Question 1

What is the name of the technique that involves heating liquids or food to a high temperature to kill harmful microorganisms and prevent spoilage?

Accepted Answer

Answer reason: Pasteurization Pasteurization is the controlled heating of liquids/foods (e.g., milk, juice) to a specific temperature for a set time to reduce pathogenic microorganisms and extend shelf life. It does not necessarily eliminate all microbes or spores, distinguishing it from sterilization. Boiling is a general method of heating but is not the named food-safety preservation process described. Distillation is used for separating components based on boiling points, not primarily for microbial kill to prevent spoilage.
Category reason: This tests knowledge of a food microbiology control method (pasteurization) and its purpose in reducing harmful microorganisms, which fits Microbiology rather than nursing care decision-making.

Question 2

BCG vaccine is given for...?

Accepted Answer

Answer reason: Tuberculosis BCG (Bacille Calmette-Guérin) is a live attenuated vaccine derived from Mycobacterium bovis and is used to prevent tuberculosis. It is most effective at preventing severe forms of TB in children, such as TB meningitis and miliary TB. It is not used for tetanus, typhoid, or dementia.
Category reason: This question tests knowledge of which infectious disease a specific vaccine targets, which is a core Microbiology/immunization concept rather than a nursing care judgment scenario.

Question 3

The ELISA (enzyme-linked immunosorbent assay) test is related to?

Accepted Answer

Answer reason: HIV ELISA is a common screening immunoassay used to detect antibodies (and/or antigen in some formats) against HIV in blood. Because screening tests can yield false positives, reactive ELISA results are typically confirmed with a more specific supplemental test (e.g., differentiation immunoassay and/or nucleic acid testing). While ELISA principles can be applied to many infections, it is classically and most commonly associated in exams with HIV screening.
Category reason: This is a question about laboratory immunoassay testing used to detect infectious agents, which is primarily studied under Microbiology rather than nursing care decision-making.

Question 4

Pneumonia Quiz Q1. What is the main cause of pneumonia?

Accepted Answer

Answer reason: Bacteria Pneumonia is most commonly caused by infectious pathogens, and in general clinical teaching the most frequent cause is bacterial infection (e.g., Streptococcus pneumoniae) causing alveolar inflammation and consolidation. Allergy is not a primary cause of pneumonia. Viruses and fungi can cause pneumonia, but are less commonly the “main cause” in typical community-acquired pneumonia framing.
Category reason: This item asks about the etiologic agent responsible for pneumonia, which is foundational infectious-disease knowledge (pathogens and causation) rather than a nursing intervention or prioritization question, fitting Microbiology.

Question 5

Whooping cough is caused by?

Accepted Answer

Answer reason: Bordetella pertussis Whooping cough (pertussis) is a highly contagious respiratory infection caused by the gram-negative coccobacillus Bordetella pertussis. The organism produces toxins (including pertussis toxin) that damage respiratory epithelium and contribute to the characteristic paroxysmal cough and inspiratory “whoop.” Corynebacterium diphtheriae causes diphtheria, Clostridium species cause tetanus/botulism/gas gangrene, and pneumococcus commonly causes pneumonia/otitis media rather than classic pertussis.
Category reason: This is a question about identifying the causative bacterial organism of an infectious disease, which is core Microbiology knowledge rather than a nursing care/intervention scenario.

Question 6

Tuberculosis is caused by?

Accepted Answer

Answer reason: Mycobacterium tuberculosis Tuberculosis is an infectious disease caused by the acid-fast bacillus Mycobacterium tuberculosis, most commonly affecting the lungs. The other options are different pathogens that cause other diseases (e.g., Staphylococcus aureus causes skin/soft-tissue infections; Streptococcus pneumoniae causes typical bacterial pneumonia; Salmonella typhi causes typhoid fever). Therefore, the causative organism of TB is Mycobacterium tuberculosis.
Category reason: This is a foundational question asking which microorganism causes a specific infectious disease, which is primarily studied under Microbiology rather than nursing care decision-making.

Question 7

What is the name of the Vaccine used for typhoid prevention?

Accepted Answer

Answer reason: Typhim vi Typhim vi is the Vi capsular polysaccharide typhoid vaccine used to prevent infection by Salmonella Typhi. BCG is for tuberculosis, DPT protects against diphtheria/pertussis/tetanus, and Hepatitis B vaccine prevents hepatitis B virus infection. Therefore, the only option specifically indicated for typhoid prevention is Typhim vi.
Category reason: This question tests factual knowledge of which vaccine corresponds to prevention of a specific infectious disease (typhoid), which is a core topic in microbiology and immunization science rather than nursing prioritization or care planning.

Question 8

The causative organism of Tetanus is?

Accepted Answer

Answer reason: Clostridium tetani Tetanus is caused by Clostridium tetani, an anaerobic, spore-forming gram-positive bacillus found in soil and animal feces. It produces tetanospasmin, a neurotoxin that blocks inhibitory neurotransmitters (GABA and glycine), leading to muscle rigidity and spasms. The other organisms listed cause different diseases (botulism, gas gangrene/food poisoning, and anthrax, respectively).
Category reason: This item tests identification of the infectious agent responsible for a specific disease, which is a foundational concept in microbiology rather than a nursing-care decision.

Question 9

Which is a serious blood related disease?

Accepted Answer

Answer reason: Typhoid Typhoid fever is a systemic infection caused by Salmonella Typhi that enters the bloodstream (bacteremia) and can lead to severe complications such as intestinal hemorrhage or perforation. It is classically associated with prolonged fever and systemic toxicity due to hematogenous spread. The other options are serious infections but are not typically framed as “blood related” diseases in this context.
Category reason: This item tests identification of an infectious disease in terms of systemic (bloodstream) involvement and causative organisms, which aligns best with Microbiology rather than nursing interventions or prioritization.

Question 10

Yellow fever is transmitted by?

Accepted Answer

Answer reason: Aedes mosquito Yellow fever is an arboviral infection transmitted primarily by Aedes species mosquitoes (notably Aedes aegypti) in urban cycles, with Aedes/Haemagogus species involved in sylvatic cycles. Anopheles mosquitoes are the main vectors for malaria, not yellow fever. Culex mosquitoes commonly transmit viruses such as West Nile and Japanese encephalitis. Sand flies are vectors for leishmaniasis and bartonellosis, not yellow fever.
Category reason: This is a question about infectious disease transmission vectors (a microbiology/medical entomology concept) rather than a nursing intervention or clinical judgment scenario.

Question 11

Ascariasis is caused by?

Accepted Answer

Answer reason: Ascaris lumbricoides Ascariasis is an intestinal helminth infection specifically caused by the roundworm Ascaris lumbricoides. Entamoeba histolytica causes amoebiasis/dysentery, hookworm causes ancylostomiasis with iron-deficiency anemia, and Taenia solium causes taeniasis/cysticercosis. Therefore, the causative organism for ascariasis is Ascaris lumbricoides.
Category reason: This question tests identification of the causative organism of an infectious/parasitic disease, which is a core topic in microbiology/parasitology rather than nursing care decision-making.

Question 12

Amoeba is a type of?

Accepted Answer

Answer reason: Protozoa Amoebae are unicellular eukaryotic organisms classified as protozoa (traditionally within Protista). They move and feed using pseudopodia and do not have fungal cell walls or chloroplasts typical of algae. Viruses are acellular and require host cells for replication, unlike amoebae which are free-living cells.
Category reason: This is a classification question about microorganisms (amoeba type), which is primarily studied in Microbiology rather than nursing care decision-making.

Question 13

Ring worm is caused by?

Accepted Answer

Answer reason: Fungus Ringworm (tinea) is a superficial dermatophyte infection caused by fungi such as Trichophyton, Microsporum, and Epidermophyton. Despite the name, it is not caused by a worm, virus, protozoa, or bacteria. These fungi infect keratinized tissues (skin, hair, nails) and are typically treated with topical or systemic antifungals depending on severity and location.
Category reason: This item tests the causative microorganism of a common infection (ringworm/tinea), which is foundational infectious-disease etiology and classification under Microbiology rather than nursing care prioritization.

Question 14

Malaria is caused by?

Accepted Answer

Answer reason: Plasmodium Malaria is caused by protozoan parasites of the genus Plasmodium (e.g., P. falciparum, P. vivax) transmitted by the bite of infected female Anopheles mosquitoes. E coli is a bacterium primarily associated with gastrointestinal/urinary infections, not malaria. Leishmania causes leishmaniasis, and HIV causes AIDS; neither is the etiologic agent of malaria.
Category reason: This question tests identification of the causative infectious organism (a protozoan parasite), which is a core Microbiology concept rather than a nursing intervention or clinical judgment scenario.

Question 15

A 45-year-old patient presents with a facial appearance that is marked by thickened, coarse, and deeply furrowed skin. The skin appears to be involved in the cheeks, forehead, and nose. The patient complains of numbness and weakness in the extremities. On examination, there are hypopigmented and erythematous patches with loss of sensation. What is the medical condition characterized by the term "Leonine facies"?

Accepted Answer

Answer reason: Lepromatous Leprosy Leonine facies (thickened, coarse, deeply furrowed facial skin with nodular infiltration) is classically associated with lepromatous leprosy due to diffuse dermal infiltration by Mycobacterium leprae. The presence of hypopigmented/erythematous patches with loss of sensation and peripheral neuropathy symptoms (numbness, weakness) strongly supports Hansen disease. Acromegaly can cause coarse facial features but does not cause anesthetic skin patches, and myasthenia gravis causes fatigable weakness without sensory loss or skin lesions.
Category reason: This question tests recognition of an infectious disease manifestation (Hansen disease) and its characteristic clinical features, which is best classified under Microbiology.

Question 16

Vesiculopustular Rash, Lymphadenopathy, Fever?

Accepted Answer

Answer reason: Monkeypox A vesiculopustular rash accompanied by fever and prominent lymphadenopathy is characteristic of mpox (monkeypox); lymphadenopathy is a key feature that helps distinguish it from varicella (chickenpox), which typically lacks significant lymph node enlargement. Measles classically causes a maculopapular (not vesiculopustular) rash with cough/coryza/conjunctivitis and Koplik spots. Secondary syphilis presents with a diffuse maculopapular rash (often involving palms/soles) rather than vesiculopustules.
Category reason: This question tests identification of an infectious disease based on characteristic clinical features (rash pattern plus lymphadenopathy and fever), which is primarily studied in Microbiology rather than nursing care decision-making.

Question 17

Which of the following disease is caused by virus?

Accepted Answer

Answer reason: small pox Smallpox is caused by the Variola virus (a poxvirus), making it a viral disease. Cholera is caused by the bacterium Vibrio cholerae, tuberculosis by Mycobacterium tuberculosis, and malaria by Plasmodium parasites transmitted by Anopheles mosquitoes. Therefore, among the listed options, only small pox is viral.
Category reason: The question tests identification of the type of infectious agent (virus vs bacteria vs parasite), which is a core concept in Microbiology rather than nursing interventions or care prioritization.

Question 18

Tuberculosis (TB) is caused by?

Accepted Answer

Answer reason: Bacteria Tuberculosis is an infectious disease caused by the bacterium Mycobacterium tuberculosis. It is not caused by viruses, fungi, or protozoa. TB commonly affects the lungs but can also involve other organs (extrapulmonary TB).
Category reason: This question tests identification of the type of pathogen responsible for a specific infectious disease, which is a core Microbiology concept.

Question 19

Trans-placental spread is least associated with?

Accepted Answer

Answer reason: HSV HSV is most commonly transmitted to the neonate during delivery through contact with infected genital secretions (intrapartum), rather than via transplacental spread. In contrast, rubella and HIV can cross the placenta and cause congenital infection, and HBV can be vertically transmitted (including in utero, though more often peripartum). Therefore, transplacental transmission is least associated with HSV compared with the other options.
Category reason: This question tests routes of maternal-fetal transmission for specific pathogens (congenital and perinatal infections), which is primarily microbiology/infectious disease knowledge rather than a nursing intervention decision.

Question 20

Chickenpox & Shingles are caused by?

Accepted Answer

Answer reason: Varicella-Zoster virus Varicella-zoster virus (VZV), a herpesvirus, causes primary infection as varicella (chickenpox). After the initial infection, the virus remains latent in dorsal root or cranial nerve ganglia. Reactivation later in life (often with aging or immunosuppression) produces herpes zoster (shingles) in a dermatomal distribution. The other listed viruses cause different diseases and do not account for both chickenpox and shingles.
Category reason: This question tests the causative infectious agent for specific viral diseases (chickenpox and shingles), which is foundational microbiology/virology knowledge rather than a nursing intervention or prioritization scenario.

Question 21

What type of vaccine is T.T.?

Accepted Answer

Answer reason: Toxoid vaccine T.T. refers to tetanus toxoid, which is an inactivated (detoxified) form of the tetanus toxin used to stimulate protective antitoxin antibodies. It is not a live or killed whole-organism vaccine; protection comes from immunity to the toxin rather than to the bacterium itself. This is why tetanus prophylaxis uses toxoid-containing vaccines (e.g., Td/Tdap) and, when indicated, tetanus immune globulin for immediate passive protection.
Category reason: This question tests the scientific classification of vaccines (type/mechanism of antigen), which is core microbiology/immunization knowledge rather than a nursing care decision.

Question 22

How many components are there in the chain of infection?

Accepted Answer

Answer reason: 6 The chain of infection classically consists of six links: infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host. Breaking any one of these links can prevent infection from occurring or spreading. This is a foundational infection-control concept used to guide prevention measures (e.g., hand hygiene interrupts transmission).
Category reason: This tests the foundational concept of how infections are transmitted (the chain of infection), which is primarily taught under Microbiology rather than a specific nursing action scenario.

Question 23

Which among the following is the most primitive life form?

Accepted Answer

Answer reason: VIRUS Viruses are considered the most primitive/least complex biological entities among the options because they are acellular (not made of cells) and consist mainly of nucleic acid (DNA or RNA) within a protein coat (sometimes with an envelope). They lack ribosomes and metabolic machinery and can replicate only inside a host cell (obligate intracellular parasites). In contrast, bacteria and blue-green algae (cyanobacteria) are prokaryotic cells with their own cellular structures, and protozoa are more complex eukaryotic cells.
Category reason: This is a foundational question about types of microorganisms and relative biological complexity, which is studied in Microbiology rather than nursing care decision-making.

Question 24

Purple discoloration of a urinary catheter bag is most characteristically associated with?

Accepted Answer

Answer reason: Chronic catheter + E.Coli UTI Purple urine bag syndrome occurs in chronically catheterized patients with urinary tract infection from bacteria that metabolize tryptophan to indigo (blue) and indirubin (red) pigments, producing a purple discoloration in the catheter/bag. It is classically associated with alkaline urine, constipation, and long-term indwelling catheters. Rifampicin typically causes orange/red body fluid discoloration, beetroot may cause red urine, and porphyria is not a typical cause of purple catheter bag discoloration.
Category reason: This question tests recognition of an infection-related phenomenon linked to specific urinary bacteria in catheterized patients, which is primarily a microbiology concept rather than a nursing intervention/prioritization scenario.

Question 25

What is the most common cause of bacterial meningitis in newborns?

Accepted Answer

Answer reason: Streptococcus agalactiae (Group B Strep) Group B Streptococcus is the leading cause of neonatal bacterial meningitis, typically acquired vertically from maternal genital tract colonization during delivery. It is a classic early-onset neonatal pathogen (along with E. coli), and remains a key cause despite prophylaxis programs. Hib is now uncommon in infants due to vaccination, and S. pneumoniae and N. meningitidis are more common causes in older infants/children rather than newborns.
Category reason: This question tests knowledge of the most common causative organism (pathogen epidemiology) for neonatal meningitis, which is a foundational microbiology/infectious disease concept rather than a nursing intervention or prioritization scenario.

Question 26

5 doses vaccine on days 0, 3, 7, 14, and 28 is for?

Accepted Answer

Answer reason: Rabies The classic rabies post-exposure prophylaxis vaccine schedule is given on days 0, 3, 7, 14, and (in some protocols/older schedules or immunocompromised patients) day 28. This timing is specific to building active immunity after a potential rabies exposure, often combined with rabies immunoglobulin on day 0 for previously unvaccinated individuals. The other listed vaccines do not use this characteristic multi-dose day-based regimen.
Category reason: This question tests knowledge of an immunization schedule specific to an infectious disease (rabies), which is foundational infectious disease/vaccine content within Microbiology rather than a nursing care decision-making scenario.

Question 27

Prophylactic treatment started after exposure to HIV virus ...??

Accepted Answer

Answer reason: Within 72 hours Post-exposure prophylaxis (PEP) for HIV should be initiated as soon as possible after a potential exposure, and it is generally considered ineffective if started after 72 hours. Earlier initiation (e.g., within hours) is preferred because viral replication begins quickly. Therefore, the best single time cutoff among the options is within 72 hours.
Category reason: This item tests foundational knowledge about HIV post-exposure prophylaxis timing rather than nursing prioritization or a patient-care scenario, fitting best under Microbiology.

Question 28

The liver disease Hepatitis-B is caused by?

Accepted Answer

Answer reason: DNA Virus Hepatitis B virus (HBV) is a partially double-stranded DNA virus in the Hepadnaviridae family. It causes hepatitis through viral infection of hepatocytes and the host immune response, which can progress to chronic hepatitis, cirrhosis, and hepatocellular carcinoma. In contrast, hepatitis A and C are RNA viruses, and bacteria/helminths do not cause HBV infection.
Category reason: This is a causative-agent identification question about the type of pathogen (DNA vs RNA virus), which is a core Microbiology concept rather than a nursing care/intervention decision.

Question 29

Which of the following is not a sexually transmitted disease (STD)?

Accepted Answer

Answer reason: Tuberculosis Tuberculosis (TB) is primarily transmitted via airborne droplet nuclei from an infected person’s respiratory secretions, not through sexual contact. In contrast, syphilis and gonorrhea are classic bacterial STIs spread through sexual exposure, and HIV is a viral infection commonly transmitted sexually (as well as via blood and perinatal routes). While TB can rarely involve the genitourinary tract, its mode of transmission is not classified as an STD.
Category reason: This is a foundational infectious-disease classification question about modes of transmission of pathogens, which best fits Microbiology rather than nursing care decision-making.

Question 30

LYME DISEASE IS TRANSMITTED TO HUMANS THROUGH TOUCHING AN?

Accepted Answer

Answer reason: NONE OF THE ABOVE Lyme disease is primarily transmitted to humans via the bite of infected Ixodes (deer) ticks carrying Borrelia burgdorferi, not through casual contact. Touching, kissing, or having sex with an infected person are not recognized routes of transmission. Therefore, none of the listed interpersonal-contact options correctly describes how Lyme disease is transmitted.
Category reason: This question tests the mode of transmission of an infectious agent (vector-borne transmission by ticks), which is a foundational Microbiology concept rather than a nursing intervention/priority scenario.

Question 31

Keeping pigs away from human settlements helps in the eradication of ____

Accepted Answer

Answer reason: Japanese encephalitis Japanese encephalitis virus is a zoonotic arbovirus transmitted by Culex mosquitoes, with pigs serving as major amplifying hosts that increase local viral circulation. Keeping pigsties away from human dwellings reduces mosquito access to infected pigs and therefore lowers spillover risk to humans. This reservoir-control strategy is not relevant for malaria (human–mosquito–human), elephantiasis (filariasis reservoirs vary and control focuses on vectors/MDAs), or polio (fecal–oral spread without an animal reservoir).
Category reason: This question tests knowledge of an infectious disease reservoir/amplifying host and vector-borne transmission, which falls under Microbiology.

Question 32

Rabies disease is transmitted by –?

Accepted Answer

Answer reason: Dog bite Rabies is a zoonotic viral infection transmitted primarily through saliva of an infected animal introduced via a bite. Dogs are the most common source of human rabies transmission worldwide, making this the best single answer in typical public health/medical exam contexts. Mosquitoes and houseflies do not transmit rabies, and while other mammals can carry rabies, rat bites are not a common transmission route compared with dogs.
Category reason: This question tests the infectious disease transmission route of a specific virus, which is foundational content in microbiology rather than a nursing care decision.

Question 33

HOW DOES EBOLA SPREAD FROM HUMAN TO HUMAN?

Accepted Answer

Answer reason: SPREADS THROUGH DIRECT CONTACT WITH BLOOD AND BODILY FLUIDS Ebola virus is transmitted via direct contact with infected blood or other body fluids (e.g., vomit, diarrhea, urine, semen) through broken skin or mucous membranes, including exposure to contaminated needles or surfaces. It is not primarily spread by inhaling droplets in typical community settings like respiratory viruses. Waterborne transmission is not a recognized route for Ebola. Therefore, direct contact with infectious body fluids best explains human-to-human spread.
Category reason: This item tests the transmission route of a specific infectious agent (Ebola virus), which is core content in microbiology and communicable disease mechanisms.

Question 34

LJ medium is used for the culture of?

Accepted Answer

Answer reason: M.Tuberculosis Löwenstein–Jensen (LJ) medium is an egg-based selective medium designed to support the slow growth of mycobacteria while inhibiting many contaminants (e.g., via malachite green). It is classically used to culture Mycobacterium tuberculosis from clinical specimens. The other listed organisms are typically cultured on different routine media (e.g., MacConkey for many Enterobacterales, specialized media for Vibrio and Corynebacterium).
Category reason: This question tests knowledge of which culture medium is used for a specific pathogen, a core topic in identifying and growing microorganisms in Microbiology.

Question 35

MacConkey agar is used for the culture of?

Accepted Answer

Answer reason: E.Coli MacConkey agar is a selective and differential medium designed to isolate Gram-negative enteric bacilli and distinguish lactose fermenters from non-fermenters. It contains bile salts and crystal violet that inhibit most Gram-positive organisms, and lactose with neutral red to indicate fermentation. Escherichia coli typically grows well and ferments lactose, producing pink colonies. The other listed organisms require different media and growth conditions (e.g., Lowenstein-Jensen for Mycobacterium tuberculosis).
Category reason: This question tests knowledge of culture media selection and bacterial growth characteristics, which is a core topic in Microbiology.

Question 36

Which of the following diseases is transmitted by mosquitoes?

Accepted Answer

Answer reason: Malaria Malaria is a vector-borne parasitic infection caused by Plasmodium species and spread to humans through bites of infected female Anopheles mosquitoes. Tuberculosis is transmitted via airborne droplets, and polio is primarily spread by the fecal-oral route. Therefore, mosquito transmission uniquely matches malaria among the listed choices.
Category reason: This question tests knowledge of infectious disease transmission vectors (mosquito-borne spread), which is a core concept in Microbiology.

Question 37

Amniotic cavity inoculation is one type of virus culture in?

Accepted Answer

Answer reason: c- embryonated egg Amniotic cavity inoculation is a classic method for cultivating certain viruses (notably influenza) using embryonated chicken eggs. The virus is introduced into specific compartments (e.g., amniotic or allantoic cavity) to allow replication in a controlled living system. This approach is distinct from tissue culture monolayers and from inoculation of whole laboratory animals. It remains foundational in virology and vaccine production methods.
Category reason: This question tests methods of viral cultivation (use of embryonated eggs and inoculation sites), which is a core topic in Microbiology.

Question 38

PCR starts with:

Accepted Answer

Answer reason: PCR begins by heating the sample to separate double-stranded DNA into single strands, creating accessible templates. Only after strand separation can primers bind during the annealing step. DNA polymerase then extends from those primers during the extension step to synthesize new DNA strands. Therefore, denaturation is the first stage of each PCR cycle.
Category reason: This question tests the basic steps of the polymerase chain reaction, a core molecular diagnostic technique used in microbiology and related lab methods.

Question 39

Which of the following is a bacterial dangerous disease?

Accepted Answer

Answer reason: It is caused by the bacterium Vibrio cholerae and can rapidly become life-threatening due to profuse watery diarrhea leading to severe dehydration and shock. In contrast, malaria is caused by Plasmodium (a protozoan parasite), while dengue and Ebola are viral infections. Therefore, among the listed choices, only this one is bacterial.
Category reason: This question tests identification of the type of infectious agent (bacterial vs protozoal vs viral), which is a core Microbiology concept rather than a nursing intervention or prioritization task.

Question 40

BCG vaccine gives protection against —

Accepted Answer

Answer reason: BCG (bacille Calmette-Guérin) is a live attenuated vaccine derived from Mycobacterium bovis that provides immunity against Mycobacterium tuberculosis. It is most effective at preventing severe forms of childhood TB such as TB meningitis and miliary tuberculosis. It does not provide primary protection against tetanus, measles, or diphtheria, which are covered by other vaccines (e.g., DTaP/DTwP and MMR).
Category reason: This question tests knowledge of which pathogen/disease a specific vaccine targets, which is a core immunization and infectious-disease concept within Microbiology rather than a nursing-care decision scenario.

Question 41

Which of the Following Hepatitis Viruses is More likely to be Acquired Via FOOD/WATER Ingestion.?

Accepted Answer

Answer reason: Hepatitis A is transmitted primarily by the fecal–oral route, making contaminated food and water common sources of infection. In contrast, hepatitis B, C, and D are mainly spread through blood and body fluids (e.g., sexual contact, percutaneous exposure, or perinatal transmission). Outbreaks are classically linked to poor sanitation, contaminated water supplies, or food handled by infected individuals. The incubation and acute, self-limited course also fit typical epidemiology of fecal–oral viral hepatitis.
Category reason: This tests mode of transmission of viral hepatitis, which is a core concept in microbiology/infectious disease rather than a nursing care decision.

Question 42

BCG injection gives protection against?

Accepted Answer

Answer reason: BCG (Bacille Calmette-Guérin) is a live attenuated vaccine derived from Mycobacterium bovis and is used for prevention of tuberculosis. It is most effective at reducing the risk of severe pediatric forms of TB such as TB meningitis and miliary TB, though protection against adult pulmonary TB is variable. Measles, pertussis (whooping cough), and polio are prevented by other vaccines (e.g., MMR, DTaP, IPV/OPV).
Category reason: This question tests vaccine-targeted pathogen/disease knowledge, which is foundational infectious disease and immunization content under Microbiology rather than nursing care decision-making.

Question 43

Malaria is transmitted by?

Accepted Answer

Answer reason: Malaria is caused by Plasmodium parasites and is transmitted to humans through the bite of infected female Anopheles mosquitoes, which require blood meals for egg development. Male mosquitoes do not bite humans and therefore do not transmit the parasite. The tsetse fly is a vector for African trypanosomiasis (sleeping sickness), not malaria. Obesity is not an infectious vector and is unrelated to malaria transmission.
Category reason: This question tests knowledge of an infectious disease vector and pathogen transmission, which is a core concept in Microbiology.

Question 44

The Femal anopheles mosquito causes____

Accepted Answer

Answer reason: Female Anopheles mosquitoes are the vector that transmits Plasmodium parasites to humans during a blood meal. After inoculation, parasites first infect the liver and then red blood cells, producing the febrile paroxysms and other manifestations of malaria. Typhoid is typically transmitted via contaminated food/water (Salmonella Typhi), and “headache” is a nonspecific symptom rather than a vector-borne disease. “Appendix” is an organ and not caused by a mosquito.
Category reason: This question tests knowledge of an infectious disease vector (Anopheles transmitting Plasmodium), which is a foundational microbiology/parasitology concept rather than a nursing intervention or prioritization task.

Question 45

Q. Sleeping Sickness caused by...

Accepted Answer

Answer reason: Sleeping sickness (African trypanosomiasis) is caused by Trypanosoma brucei, which is transmitted to humans through the bite of infected tsetse flies (Glossina species). Mosquitoes transmit malaria, dengue, and other arboviruses rather than trypanosomes. Sand flies are vectors for leishmaniasis, and house flies are mechanical vectors for enteric pathogens but do not transmit African trypanosomes biologically.
Category reason: This is a question about an infectious disease vector and pathogen transmission, which is foundational microbiology/parasitology knowledge rather than a nursing care decision.

Question 46

H1N1 Virus is linked to .......?

Accepted Answer

Answer reason: H1N1 refers to an influenza A virus subtype that caused the 2009 pandemic and is commonly called “swine flu” because of its genetic links to influenza viruses circulating in pigs. HIV and AIDS are caused by a retrovirus (HIV) and are unrelated to influenza viruses. A “mental disorder” is not an infectious disease entity linked to the H1N1 virus.
Category reason: This item tests recognition of a virus subtype and its common disease association (H1N1 influenza/swine flu), which is core content in microbiology/virology rather than nursing interventions or prioritization.

Question 47

Examples of combined vaccines are except-?

Accepted Answer

Answer reason: Combined vaccines contain antigens against more than one disease in a single preparation. DPT (diphtheria, pertussis, tetanus), DT (diphtheria, tetanus), and MMR (measles, mumps, rubella) are all combination vaccines. BCG is a single live attenuated vaccine primarily against tuberculosis, so it is not a combined vaccine.
Category reason: This question tests knowledge of vaccine types (combination vs single-antigen preparations), which is a foundational infectious-disease/immunization concept aligned with Microbiology.

Question 48

Symmetrical Unilocular rashes firstly appearing from trunk and then on face, arms and legs is a characteristic of disease?

Accepted Answer

Answer reason: Varicella classically presents with lesions that begin on the trunk and then spread to the face and extremities (centripetal distribution). Smallpox typically has a centrifugal distribution (more on face and distal extremities) and lesions tend to be in the same stage. Measles and rubella are primarily maculopapular exanthems rather than vesicular “unilocular” lesions. The trunk-first pattern with vesicular rash most strongly supports varicella.
Category reason: This question tests recognition of infectious disease rash distribution patterns (varicella vs smallpox vs measles/rubella), which is core content in microbiology/communicable diseases rather than nursing interventions.

Question 49

Tuberculosis/TB is a..??

Accepted Answer

Answer reason: TB is caused by Mycobacterium tuberculosis, an acid-fast, slow-growing bacterium transmitted primarily via airborne droplet nuclei. Viral and fungal pathogens can cause pneumonia-like illnesses, but they do not produce classic tuberculosis infection. Correct identification matters because TB requires prolonged multi-drug antibacterial therapy and specific infection-control measures (airborne precautions).
Category reason: This question tests identification of the type of pathogen responsible for tuberculosis, which is a foundational concept in Microbiology rather than a nursing intervention or prioritization scenario.

Question 50

Short curved or straight rods, motile by single polar flagellum

Accepted Answer

Answer reason: Vibrios are classically comma-shaped (curved) gram-negative rods and are motile due to a single polar flagellum (monotrichous). Spirochaeta are spiral organisms with axial filaments rather than a single polar flagellum. Escherichia are straight rods typically with peritrichous flagella, and Lactobacillus are generally non-motile gram-positive rods.
Category reason: This question tests identification of bacterial morphology and motility patterns, which is a core concept in Microbiology rather than nursing care decision-making.

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