Question 1

What is the cause of mumps?

Accepted Answer

Answer reason: Mumps is caused by the mumps virus, a paramyxovirus (genus Rubulavirus) transmitted primarily via respiratory droplets and close contact. It classically infects salivary glands, leading to parotitis, and can also cause orchitis, meningitis, or pancreatitis. Because it is a viral illness, antibiotics are not effective; prevention is mainly through MMR vaccination.
Category reason: This question tests identification of the infectious organism responsible for a disease, which is a foundational microbiology concept rather than a nursing intervention or clinical prioritization task.

Question 2

Widal teat is used for?

Accepted Answer

Answer reason: The Widal test is a serologic agglutination test that detects antibodies (O and H agglutinins) against Salmonella enterica serovar Typhi and Paratyphi. It is therefore used in the evaluation of enteric (typhoid) fever, particularly in settings where culture facilities are limited. Interpretation depends on rising titers in paired sera and local baseline titers, because false positives and negatives can occur.
Category reason: This question tests knowledge of a laboratory serologic test used to diagnose an infectious disease, which is a core Microbiology topic rather than a nursing intervention decision.

Question 3

All of the following are RNA viruses EXCEPT?

Accepted Answer

Answer reason: Poxviruses are large, enveloped DNA viruses (double-stranded DNA) that replicate in the cytoplasm, so they are not classified as RNA viruses. In contrast, picornaviruses, paramyxoviruses, reoviruses, and rhabdoviruses all have RNA genomes. Therefore the listed exception among “RNA viruses” is the DNA virus family.
Category reason: This question tests classification of viral families by genome type (DNA vs RNA), which is a core topic in microbiology/virology rather than nursing care decisions.

Question 4

Toxoplasma Gondii can be described as...?

Accepted Answer

Answer reason: Toxoplasma gondii is a protozoan parasite that must live and replicate inside host cells, making it an obligate intracellular organism. This property is central to its pathogenesis, including formation of tissue cysts within cells. The other choices are vague or incomplete descriptors and do not capture the defining obligate intracellular nature of this parasite.
Category reason: This item tests identification/classification of a protozoan parasite based on its microbiologic characteristics, which falls under Microbiology.

Question 5

Infants and child with primary tuberculosis have

Accepted Answer

Answer reason: Children with primary TB usually have paucibacillary disease and are less likely to generate infectious aerosols because they tend not to have forceful, productive cough. Cavitary pulmonary lesions (a major driver of transmission) are uncommon in young children compared with adults. Therefore, they are typically not a significant source of community transmission despite being at higher risk for severe disseminated disease.
Category reason: This question tests an infectious-disease transmission concept (infectivity of primary tuberculosis in infants/children), which fits foundational microbiology rather than nursing interventions or prioritization.

Question 6

The BCG vaccine is administered for immunity against?

Accepted Answer

Answer reason: BCG (Bacille Calmette-Guérin) is a live attenuated vaccine derived from Mycobacterium bovis and is used primarily to protect against severe forms of tuberculosis in children (e.g., TB meningitis, miliary TB). It does not provide immunity against malaria, hepatitis viruses, or nonspecific conditions like jaundice. Therefore, the best match among the options is tuberculosis.
Category reason: This tests knowledge of what infectious organism/disease a specific vaccine targets, which is a core Microbiology/immunization concept rather than a nursing care intervention decision.

Question 7

Gonorrhea is a STD caused by?

Accepted Answer

Answer reason: Gonorrhea is caused by Neisseria gonorrhoeae, a gram-negative diplococcus transmitted through sexual contact. Because it is bacterial, it is treated with antibiotics (with attention to coinfection with Chlamydia trachomatis and local resistance patterns). Untreated infection can ascend and cause pelvic inflammatory disease, infertility, and disseminated gonococcal infection. Fungi, parasites, and viruses do not cause gonorrhea.
Category reason: This question tests the etiologic agent type of an STI, which is core microorganism-based disease knowledge and best fits Microbiology rather than nursing-care decision-making.

Question 8

Common cold is caused by?

Accepted Answer

Answer reason: Rhinoviruses are the most common cause of acute viral nasopharyngitis and account for a large proportion of common cold cases, especially in early fall and spring. They primarily infect the upper respiratory tract and spread via respiratory droplets and fomites. Tobacco mosaic virus is a plant virus, rotavirus mainly causes gastroenteritis, and adenovirus more often causes pharyngitis/conjunctivitis and can cause cold-like illness but is less common than rhinovirus.
Category reason: This item tests the etiologic microorganism responsible for a common infectious syndrome, which is a foundational topic in Microbiology rather than a nursing care decision.

Question 9

Which body fluid is known to carry the highest concentration of HIV?

Accepted Answer

Answer reason: HIV is present at clinically significant levels in blood, which is why blood-to-blood exposure (e.g., needle-stick injuries, transfusion without screening) is a high-risk transmission route. In contrast, saliva, sweat, and urine generally contain none or only trace amounts of virus and are not considered efficient vehicles for transmission unless visibly contaminated with blood. Standard precautions emphasize protection from blood and certain other potentially infectious body fluids to prevent occupational transmission.
Category reason: This question tests knowledge of where HIV is present in highest concentration and the relative infectiousness of different body fluids, which is a core topic in microbiology and infectious disease transmission rather than a nursing intervention scenario.

Question 10

A 45-year-old man presents with a history of low-grade fever, dry cough, weight loss, and fatigue for 3 weeks. He works as a construction worker and has recently been involved in cleaning an old, abandoned warehouse in eastern India. On examination, there is mild hepatosplenomegaly. Chest X-ray shows diffuse reticulonodular infiltrates. A bronchoalveolar lavage (BAL) specimen is sent for microscopy, which reveals small, round, blue-staining intracellular organisms within macrophages on GMS stain. What is the most likely diagnosis?

Accepted Answer

Answer reason: The finding of small, round organisms that are intracellular within macrophages on GMS stain is classic for Histoplasma capsulatum (often seen as tiny yeasts residing in macrophages). The clinical picture of subacute pulmonary symptoms with reticulonodular infiltrates and systemic signs such as hepatosplenomegaly supports disseminated or progressive pulmonary infection. Exposure risk is consistent with environmental disturbance of contaminated soil/dust in enclosed old buildings where bird or bat droppings may be present. Alternative dimorphic fungi have different characteristic morphologies (e.g., broad-based budding for Blastomyces; spherules for Coccidioides; encapsulated yeasts for Cryptococcus).
Category reason: This item tests identification of a fungal pathogen based on stain appearance, intracellular location, and clinical epidemiology, which is a foundational infectious-disease organism recognition task within Microbiology rather than a nursing intervention or prioritization scenario.

Question 11

Disease is caused by dog bites?

Accepted Answer

Answer reason: Rabies is a fatal viral infection transmitted through the saliva of infected mammals, most commonly via bites. After inoculation, the virus travels via peripheral nerves to the central nervous system, causing encephalitis with agitation/hydrophobia and progressive neurologic decline. Prompt wound cleansing and post-exposure prophylaxis can prevent disease onset when given appropriately.
Category reason: This question tests the infectious cause of a disease transmitted by animal bites, which is core content in Microbiology rather than a nursing care/intervention scenario.

Question 12

The first sign or symptoms of H.I.V AIDS is?

Accepted Answer

Answer reason: Early HIV infection (acute retroviral syndrome) commonly presents with a flu-like illness, and fever is one of the most frequent initial symptoms. This reflects a systemic immune response during high-level viremia shortly after infection. Cough and vomiting are less characteristic as first manifestations, and diarrhea can occur but is not as consistently the earliest sign compared with fever. Therefore, among the listed options, fever is the best answer.
Category reason: This question tests knowledge of common early clinical manifestations of an infectious disease (HIV) rather than a nursing intervention or prioritization decision, aligning best with Microbiology.

Question 13

The microbe used in the Ames test is?

Accepted Answer

Answer reason: The Ames test assesses mutagenicity using strains that carry mutations in histidine biosynthesis, so they cannot grow on histidine-free media unless a reverse mutation occurs. These engineered bacterial strains are derived from Salmonella and are selected for high sensitivity to DNA damage and for permeability/repair characteristics that increase detection of mutagens. An S9 liver extract is often added to provide metabolic activation for pro-mutagens.
Category reason: This question tests knowledge of the organism used in a standard bacterial mutagenicity assay, which is a core topic in microbiology and genetic toxicology rather than nursing care decisions.

Question 14

Full form of E. coli?

Accepted Answer

Answer reason: This abbreviation refers to the bacterial species name in standard microbiology nomenclature, where the genus is abbreviated to its initial followed by the full species epithet. It is a Gram-negative bacillus commonly found as normal flora in the human gut, with some strains capable of causing disease. The other options are not valid taxonomic expansions used in clinical microbiology.
Category reason: This item tests recognition of a bacterial organism name and abbreviation expansion, which is a foundational concept in Microbiology.

Question 15

Flaccid paralysis, tripod sign, fever, nausea and vomiting are the features of-?

Accepted Answer

Answer reason: Poliovirus can produce an acute febrile illness with nausea and vomiting followed by acute flaccid paralysis due to anterior horn cell involvement. The “tripod sign” is a classic compensatory posture seen with paralytic polio as children use their arms to support the trunk because of proximal weakness. Meningitis can cause fever and vomiting but does not characteristically cause asymmetric acute flaccid paralysis with this posturing. Diphtheria typically causes pseudomembrane and toxic effects, and enteric fever causes systemic febrile illness without this neuromuscular pattern.
Category reason: This is primarily testing recognition of an infectious disease syndrome (poliomyelitis) and its characteristic neuromuscular manifestations, which fits foundational pathogen-related content under Microbiology rather than nursing interventions or prioritization.

Question 16

Which of the following diseases is a sexually transmitted disease?

Accepted Answer

Answer reason: Gonorrhea is a common sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae and is primarily spread through vaginal, anal, or oral sexual contact. Influenza is a respiratory viral infection transmitted mainly via droplets and is not classified as an STI. While multiple options listed are STIs, the item asks for a single best example, and this choice is unambiguous and widely recognized as an STI.
Category reason: This is a foundational infectious-disease identification question (which conditions are sexually transmitted), focusing on organisms and transmission categories rather than nursing interventions, fitting Microbiology within NursingScience.

Question 17

The major cultural characteristics to be considered after successful culture of microorganism include all the following, except;

Accepted Answer

Answer reason: Colony morphology (“cultural characteristics”) refers to qualitative features observed on culture media such as form/shape, margin, elevation, size, color, and texture. The count of colonies is primarily used for quantification (e.g., estimating bacterial load or CFU), not for describing morphological characteristics. Therefore it is not part of the major cultural (morphologic) characteristics used for presumptive identification after growth.
Category reason: This question tests laboratory culture interpretation and colony morphology concepts used to describe microorganisms, which are core topics in Microbiology rather than nursing care decision-making.

Question 18

The ‘Herd Immunity Threshold’ concept for controlling communicable diseases relies mainly on:

Accepted Answer

Answer reason: Herd immunity is achieved when a sufficient proportion of the population is immune, reducing the average number of secondary cases generated by an infected person. This pushes the effective reproduction number (Re) to < 1, causing transmission chains to die out. The “threshold” specifically refers to the immune proportion needed to bring Re below 1, which is derived from the reproduction number concept.
Category reason: This item tests epidemiologic principles of infectious disease transmission and population-level immunity using the reproduction number concept, which fits Microbiology/public health foundations rather than nursing interventions.

Question 19

Which hepatitis virus can be prevented through vaccination?

Accepted Answer

Answer reason: A licensed, widely used vaccine exists that induces protective anti-HBs antibodies and prevents HBV infection and its complications (including chronic hepatitis, cirrhosis, and hepatocellular carcinoma). In contrast, there is no routinely available, broadly used vaccine for hepatitis C. Hepatitis A also has an effective vaccine, but among the single-best options, HBV is the classic answer tied to universal vaccination programs and prevention of chronic liver disease.
Category reason: This tests which specific viral pathogen is vaccine-preventable, a core concept in infectious disease/virology rather than nursing process or clinical decision-making.

Question 20

Which kingdom includes mushrooms?

Accepted Answer

Answer reason: Mushrooms are eukaryotic organisms that obtain nutrients by absorption and have cell walls made largely of chitin. They reproduce via spores and lack chlorophyll, so they are not classified as plants. Protista is a diverse group of mostly unicellular eukaryotes and does not include mushrooms.
Category reason: This question tests biological classification of microorganisms and related eukaryotes, which is covered under Microbiology rather than nursing care decision-making.

Question 21

Water Borne disease is.?

Accepted Answer

Answer reason: Typhoid fever is caused by Salmonella Typhi and is commonly transmitted via the fecal–oral route through contaminated water or food, making it a classic water-borne illness. Malaria is vector-borne via Anopheles mosquitoes, not water ingestion. Diabetes is a metabolic disorder, and tetanus is typically acquired through wound contamination with spores rather than water transmission.
Category reason: This item tests knowledge of infectious disease transmission routes (water-borne vs vector-borne or noninfectious), which is a core concept in Microbiology.

Question 22

Which Of the following Infectious Disease is Known as Lockjaws ..?

Accepted Answer

Answer reason: Lockjaw (trismus) is a classic manifestation of infection with Clostridium tetani, due to tetanospasmin causing sustained muscle rigidity and spasms. The jaw muscles are often affected early, producing difficulty opening the mouth. Tuberculosis and measles do not characteristically cause trismus, and “paralysis” is a symptom category rather than a specific infectious disease diagnosis.
Category reason: This item tests identification of an infectious disease by its hallmark clinical sign, which falls under study of pathogens and their associated syndromes in Microbiology.

Question 23

Which waterborne disease is most commonly associated with poor sanitation during floods?

Accepted Answer

Answer reason: Flooding commonly contaminates drinking water with human waste, enabling fecal–oral transmission of Vibrio cholerae. This pathogen causes acute, profuse watery diarrhea and outbreaks are strongly linked to inadequate sanitation and unsafe water supplies after disasters. Malaria and dengue are mosquito-borne, and while typhoid is also fecal–oral, cholera is the classic and most outbreak-prone waterborne illness in flood-related sanitation failure.
Category reason: This question tests identification of an infectious agent and its transmission route (waterborne disease linked to fecal contamination), which is core Microbiology content rather than a nursing intervention scenario.

Question 24

Which of the following diseases is zoonotic (can be transmitted from animals to humans)?

Accepted Answer

Answer reason: Rabies is a viral infection maintained in animal reservoirs (e.g., dogs, bats, raccoons) and transmitted to humans primarily through bites or saliva exposure to mucous membranes or broken skin. It is a classic zoonosis and is almost universally fatal once clinical symptoms begin, which is why prompt post-exposure prophylaxis is critical. The other listed conditions are primarily animal diseases and are not typical direct zoonotic infections in humans.
Category reason: This item tests knowledge of infectious disease transmission between animals and humans, which is a core concept in microbiology rather than nursing care decision-making.

Question 25

A definitive diagnosis of ascariasis can be made by finding which of the following?

Accepted Answer

Answer reason: Ascariasis (Ascaris lumbricoides) is definitively diagnosed by identifying characteristic ova on stool microscopy (ova and parasite exam). Adult worms may occasionally be passed, but egg detection is the standard, confirmatory laboratory finding. The other options align with different organisms or life stages (e.g., proglottids with tapeworms, gametocytes with malaria, cysts with protozoa).
Category reason: This tests identification of a parasitic infection based on the diagnostic life stage seen on laboratory examination, which falls under Microbiology.

Question 26

Infectivity of whooping cough is during?

Accepted Answer

Answer reason: Pertussis is most contagious in the catarrhal stage (before the classic whoop) and early in the paroxysmal stage. Infectiousness typically begins about 1–2 weeks before paroxysms and declines thereafter, especially after effective antibiotic therapy. The given timeframe best matches the period when bacterial shedding and transmission risk are highest compared with the other choices.
Category reason: This question tests epidemiologic infectivity period of an infectious disease (pertussis), which is foundational infectious-disease knowledge aligned with Microbiology rather than a nursing care intervention decision.

Question 27

Pnemocystis jirovecii pneumonia Cause by?

Accepted Answer

Answer reason: Pneumocystis jirovecii is an opportunistic fungal organism that causes pneumonia primarily in immunocompromised patients (e.g., advanced HIV, transplant, chronic corticosteroid use). It was historically misclassified as a protozoan, but molecular and cell-wall features place it among fungi. Clinically this distinction matters because typical antibacterial regimens for community-acquired bacterial pneumonia will not treat it; targeted therapy (classically TMP-SMX) is required.
Category reason: This question tests identification of the causative organism type for a specific infectious pneumonia, which is a foundational microbiology concept rather than a nursing care decision.

Question 28

The principle of autoclave is?

Accepted Answer

Answer reason: Autoclaving uses moist heat (saturated steam under pressure) to sterilize. The steam transfers heat efficiently, causing irreversible denaturation of microbial proteins and enzymes, with coagulation that disrupts essential cellular functions. This mechanism reliably kills vegetative bacteria, viruses, fungi, and spores when correct time/temperature/pressure parameters are used. Oxidative damage is more characteristic of some chemical disinfectants, not steam sterilization.
Category reason: This is a foundational question about the mechanism of a sterilization method used to destroy microorganisms, which is a core concept in microbiology rather than a nursing-care decision.

Question 29

Which of the following statements is true about the vaccine shown in the image given ??

Accepted Answer

Answer reason: BCG (live attenuated Mycobacterium bovis) provides the greatest protection in infants and young children against severe TB manifestations such as miliary TB and TB meningitis, rather than reliably preventing adult pulmonary TB infection. The other options are incorrect because BCG is typically administered intradermally (not subcutaneously) and its notable adverse event is regional lymphadenitis/BCGitis rather than “bronchial neuritis.” Reconstitution details can vary by manufacturer, but that statement is not the key universally correct feature compared with its established preventive role in severe childhood TB.
Category reason: This item tests foundational vaccine/TB prevention knowledge (BCG’s protective effect and basic characteristics), which fits microbiology/immunization science rather than nursing care decision-making.

Question 30

Montoux Test is used for the diagnosis of which disease?

Accepted Answer

Answer reason: The Mantoux (tuberculin skin) test assesses a delayed-type (type IV) hypersensitivity response to purified protein derivative (PPD) from Mycobacterium tuberculosis. A positive induration suggests prior sensitization due to latent TB infection or prior BCG vaccination/exposure, and must be interpreted in clinical context and risk category. It is a screening tool for TB infection rather than a definitive test for active TB disease, which requires microbiologic and/or radiographic evaluation.
Category reason: This item tests knowledge of a specific diagnostic test used for an infectious organism (Mycobacterium tuberculosis), which is foundational microbiology rather than nursing interventions or prioritization.

Question 31

Syphilis is caused by?

Accepted Answer

Answer reason: Syphilis is an infectious disease caused by the spirochete Treponema pallidum. Spirochetes are a type of bacterium, which is why antibacterial therapy (e.g., penicillin) is effective. Viral, fungal, and parasitic pathogens cause different clinical syndromes and are treated with different medication classes. Identifying the organism type is foundational for understanding transmission, pathology, and treatment.
Category reason: This question tests identification of the infectious agent type responsible for a specific disease, which is a core concept in microbiology rather than a nursing intervention or prioritization scenario.

Question 32

Malaria disease is caused by which of the following organisms?

Accepted Answer

Answer reason: Malaria is caused by protozoan parasites of the genus Plasmodium, transmitted to humans through the bite of infected female Anopheles mosquitoes. The organism undergoes a liver stage followed by an erythrocytic stage, which produces the characteristic cyclical fevers and hemolysis. Viruses, bacteria, and fungi can cause febrile illnesses, but they do not produce the specific life cycle and red-blood-cell invasion typical of malaria.
Category reason: This item tests identification of the causative organism of an infectious disease, which is a core Microbiology concept rather than a nursing intervention or prioritization task.

Question 33

Urban Malaria scheme is based on?

Accepted Answer

Answer reason: Urban malaria control programs primarily focus on reducing vector breeding in urban settings by targeting stagnant water and other larval habitats. Larval control (source reduction, larvicides, environmental management) is emphasized because urban breeding sites are often identifiable and manageable. Adult mosquito measures and chemoprophylaxis may be supportive but are not the core basis of the scheme. Epidemiological surveys guide planning but do not constitute the foundational control strategy.
Category reason: This question tests the foundational public health principle of malaria vector control and the key basis of an urban malaria control scheme, which aligns best with Microbiology (vector-borne disease control concepts).

Question 34

Leishmenia donovani is;?

Accepted Answer

Answer reason: The organism causing visceral leishmaniasis (kala-azar) was described by Donovan (and Leishman), and the species name reflects this scientist attribution. The vector is a sandfly (Phlebotomus/Lutzomyia), not a mosquito, so the mosquito-related choices are incorrect. Kala-azar is the disease name, not the organism’s eponym in this context.
Category reason: This tests identification of an infectious protozoan organism and its naming, which is a core topic in microbiology/parasitology rather than nursing interventions.

Question 35

From which organism penicillin is extracted..?

Accepted Answer

Answer reason: Penicillin is a natural antibiotic originally derived from the mold Penicillium, which is a fungus. It inhibits bacterial cell-wall synthesis, making it effective against susceptible bacteria but not viruses. Algae are not a source of penicillin, and while bacteria can produce some antibiotics, penicillin is classically produced by fungal molds.
Category reason: This asks the biological source organism of an antibiotic (Penicillium mold), which is a core topic in Microbiology rather than nursing interventions or patient-care decisions.

Question 36

Q. AIDS is caused by which virus?

Accepted Answer

Answer reason: AIDS is the advanced stage of infection with human immunodeficiency virus, a retrovirus that primarily targets CD4+ T lymphocytes. Progressive immune suppression leads to opportunistic infections and certain malignancies that define AIDS. Influenza, coronaviruses, and poliovirus cause distinct respiratory or neurologic diseases and do not produce the characteristic CD4 depletion syndrome.
Category reason: This is a foundational question about the infectious agent responsible for a disease, which is best categorized under Microbiology rather than patient-care decision-making.

Question 37

Which disease is also known as "Breakbone Fever?"?

Accepted Answer

Answer reason: Dengue fever classically causes severe myalgias and arthralgias that give the sensation of “bones breaking,” hence the nickname. It is a mosquito-borne viral illness (Flavivirus) transmitted primarily by Aedes aegypti. Chikungunya can also cause prominent joint pains, but the established term “breakbone fever” is most strongly associated with dengue. Malaria and yellow fever have different hallmark clinical pictures and are not commonly referred to by this name.
Category reason: This is testing recognition of a common infectious disease nickname and its causative viral illness, which falls under microbiology/infectious diseases knowledge rather than nursing interventions or prioritization.

Question 38

Which organism causes malignant otitis external?

Accepted Answer

Answer reason: Malignant (necrotizing) otitis externa is most commonly caused by Pseudomonas aeruginosa, particularly in older adults with diabetes or in immunocompromised patients. It can invade cartilage and bone of the skull base, making it more severe than routine otitis externa. The other listed organisms can cause skin/ear infections but are not the classic primary pathogen for malignant otitis externa. Early recognition matters because treatment typically requires prolonged antipseudomonal antibiotics.
Category reason: This is a question about the causative infectious organism for a specific clinical condition, which is primarily a microbiology knowledge test rather than a nursing intervention/prioritization scenario.

Question 39

At what temperature shall cardiovascular tissue be stored?

Accepted Answer

Answer reason: Cardiovascular tissue is typically cryopreserved at ultra-low temperatures to halt enzymatic activity, prevent microbial proliferation, and minimize ice crystal–related structural damage. Temperatures around standard freezers (e.g., -25°C to -50°C) are insufficient for long-term preservation of cellular and extracellular matrix integrity. Ultra-low storage (about -100°C or lower) better maintains tissue viability and function for future clinical use. This aligns with common tissue banking cryostorage practices for sensitive graft materials.
Category reason: This question tests preservation/storage conditions for biological tissue, which is primarily a microbiology/tissue banking and specimen handling concept rather than nursing care prioritization or patient-specific interventions.

Question 40

Pre-processing culture areas:

Accepted Answer

Answer reason: Pre-processing culture requirements for tissue handling are established by the American Association of Tissue Banks to reduce contamination risk and ensure uniform safety practices. Such standards mandate when and how cultures should be obtained as part of quality and infection prevention in tissue banking. The other options are either overly broad (cultures do not “detect viruses” in routine culture) or describe processes not defining the core requirement being tested.
Category reason: This item tests knowledge of microbiology-related contamination control practices and regulatory standards for culturing in tissue processing, which aligns best with Microbiology rather than bedside nursing decision-making.

Question 41

Which infection control method kills spores?

Accepted Answer

Answer reason: Sterilization is the only method that reliably destroys all forms of microbial life, including bacterial spores. Disinfection typically kills many or most pathogenic organisms but does not consistently eliminate spores. Antiseptics are formulated for use on living tissue and do not achieve sporicidal activity under typical use conditions. Cleaning mainly removes organic material and reduces bioburden without necessarily killing microorganisms.
Category reason: This question tests foundational knowledge of microbial control levels (cleaning, antisepsis, disinfection, sterilization) and their ability to eliminate spores, which is a core Microbiology concept rather than a nursing judgment/intervention scenario.

Question 42

The Responsible Causative organism for HIV is?

Accepted Answer

Answer reason: HIV infection is caused by a retrovirus that targets CD4+ T lymphocytes, leading to progressive immunodeficiency and susceptibility to opportunistic infections. The other options are pathogens responsible for different conditions: scabies is due to a mite infestation, gonorrhea is caused by a bacterium, and syphilis is caused by a spirochete. Therefore, only the viral agent listed corresponds to the etiology of HIV disease.
Category reason: This question tests identification of the infectious organism responsible for a disease (HIV), which is a foundational microbiology concept rather than a nursing intervention or clinical decision-making scenario.

Question 43

'Amoebic Dysentery' is caused by?

Accepted Answer

Answer reason: It is the pathogenic intestinal protozoan that invades the colonic mucosa, producing flask-shaped ulcers and dysentery with blood and mucus. Giardia typically causes non-bloody, malabsorptive diarrhea rather than dysentery. Amoeba proteus is a free-living, nonpathogenic amoeba, and Taenia solium is a cestode associated with taeniasis/cysticercosis, not amoebic dysentery.
Category reason: This question tests the causative microorganism of an infectious disease, which is primarily covered under Microbiology rather than nursing care decision-making.

Question 44

Rice water stools are a cardinal sign in?

Accepted Answer

Answer reason: Watery “rice-water” diarrhea is classic for Vibrio cholerae infection due to toxin-mediated chloride and water secretion in the small intestine. This produces profuse, non-bloody stools with flecks of mucus, leading rapidly to severe dehydration and electrolyte loss. Typhoid more often causes fever with constipation or “pea-soup” diarrhea, and dysentery typically features blood and tenesmus rather than rice-water stools.
Category reason: This tests identification of a characteristic infectious disease presentation, which is primarily covered under Microbiology rather than nursing care decision-making.

Question 45

Transmission of the following diseases is most likely aided by flies?

Accepted Answer

Answer reason: Flies can act as mechanical vectors for pathogens transmitted via the fecal–oral route by contaminating food and water after contact with feces. Poliovirus spreads primarily by fecal–oral transmission, so poor sanitation and fly contamination can facilitate spread. Bronchial asthma is non-infectious, pulmonary tuberculosis is mainly airborne via droplet nuclei, and viral conjunctivitis is typically spread by direct contact with secretions or fomites rather than by flies.
Category reason: This is a question about modes of infectious disease transmission and vectors, which is best categorized under Microbiology rather than nursing care decision-making.

Question 46

Brucellosis is NOT transmitted through which of the following.?

Accepted Answer

Answer reason: Brucellosis is a zoonotic infection typically acquired from infected animals or their products. Common transmission routes include contact with animal tissues/fluids (e.g., placenta), inhalation of infectious aerosols (occupational exposure), and ingestion of contaminated unpasteurized dairy or undercooked animal products. Direct human-to-human transmission is extremely rare and is not considered a usual route of spread in standard epidemiology.
Category reason: This question tests modes of transmission of an infectious organism, which is a core topic in Microbiology rather than a nursing intervention or prioritization scenario.

Question 47

The primary health care provider has determined that a client has contracted hepatitis A based on flu-like symptoms and jaundice. Which statement made by the client supports this medical diagnosis?

Accepted Answer

Answer reason: "I ate selfish about 2 weeks ago at a local restaurant." Hepatitis A is transmitted via the fecal–oral route, most commonly through contaminated food or water and outbreaks linked to restaurants. The incubation period is typically about 15–50 days, so exposure around 2 weeks prior is plausible when paired with prodromal “flu-like” symptoms and jaundice. The other options describe exposures more characteristic of hepatitis B/C (sexual transmission, needle sharing, older transfusion risk).
Category reason: This question primarily tests infectious disease transmission routes and incubation related to viral hepatitis, which is foundational microbiology rather than a nursing intervention or prioritization task.

Question 48

Common causative organism of UTI is.?

Accepted Answer

Answer reason: E.Coli Most uncomplicated urinary tract infections are caused by ascending enteric gram-negative bacilli from the gastrointestinal tract, with Escherichia coli accounting for the large majority of cases. Its virulence factors (e.g., adhesins such as P fimbriae) promote attachment to uroepithelium and facilitate ascent into the bladder. Klebsiella and other organisms can also cause UTIs but are less common in typical community-acquired cases. Pneumococcus and streptococci are not typical primary pathogens for uncomplicated UTIs.
Category reason: This item tests knowledge of the typical microbial etiology of a common infection, which is foundational organism-based content best classified under Microbiology rather than nursing interventions or care prioritization.

Question 49

A patient is on his 3rd day with antibiotic therapy due to a lower respiratory tract infection. He presented 3 bouts of bloody diarrhea. What would be the likely cause?

Accepted Answer

Answer reason: Antibiotic therapy can disrupt normal gut flora, allowing C. difficile to overgrow and produce toxins that inflame and injure the colonic mucosa. This can lead to antibiotic-associated colitis, which may present with frequent diarrhea that can be bloody. The timing (day 3 of antibiotics) and GI symptoms fit this mechanism better than histamine release or allergy, which typically cause rash, pruritus, bronchospasm, or anaphylaxis. A worsening UTI would not explain acute bloody diarrhea.
Category reason: The question tests the etiologic organism and mechanism of antibiotic-associated bloody diarrhea, which is primarily an infectious disease/microbiology concept (C. difficile overgrowth and toxin-mediated colitis) rather than a nursing intervention or prioritization scenario.

Question 50

Common complication of measles is?

Accepted Answer

Answer reason: Measles (rubeola) commonly leads to respiratory complications due to viral damage to the respiratory epithelium and transient immunosuppression. This predisposes to primary viral pneumonitis and secondary bacterial pneumonia, making pneumonia a frequent and clinically important complication. Other listed options can occur with different viral illnesses (e.g., orchitis with mumps) or are less typical as the most common complication in standard exam framing.
Category reason: This item tests knowledge of a classic infectious-disease complication of measles, which is foundational microbiology/infectious disease content rather than a nursing intervention or prioritization task.

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