Question 1

Which bacterial meningitis is associated with head trauma?

Accepted Answer

Answer reason: Post–head trauma (especially basilar skull fracture) can create a CSF leak and direct communication between the nasopharynx/sinuses and the meninges, predisposing to meningitis from colonizing respiratory tract organisms. The organism most classically linked to meningitis after head trauma/CSF rhinorrhea or otorrhea is an encapsulated respiratory pathogen. In contrast, N. meningitidis is more associated with outbreaks in close-contact settings, and E. coli is a common neonatal pathogen rather than a typical post-traumatic cause. This makes the pneumococcus the best single answer in this context.

Question 2

Meningitis due to Haemophilus influenzae is most common in?

Accepted Answer

Answer reason: Influenzae type b classically causes invasive bacterial infections (including meningitis) predominantly in young children when protective antibodies are not yet well developed. The peak incidence is after loss of maternal antibody protection and before effective immunization coverage, aligning with infancy through early childhood. Neonatal meningitis is more commonly due to organisms like group B Streptococcus and E. coli, making that option a common distractor. In adults and the elderly, meningitis is more often caused by pathogens such as S. pneumoniae or N. meningitidis rather than Hib.

Question 3

Which of the following meningitis is non-communicable?

Accepted Answer

Answer reason: Tuberculous meningitis is typically a complication of Mycobacterium tuberculosis infection and is not generally considered communicable from person to person in the way acute droplet-spread meningococcal meningitis is. By contrast, meningococcal meningitis spreads via respiratory droplets and requires prompt isolation and chemoprophylaxis of close contacts, making it clearly communicable. “Bacterial meningitis” and “viral meningitis” are broad categories and can include pathogens with person-to-person transmission, so they are not reliably non-communicable as categories.

Question 4

Most fatal form of meningitis is?

Accepted Answer

Answer reason: Its case-fatality rate and risk of severe neurologic sequelae are generally higher than viral etiologies, which are often self-limited. TB and fungal meningitis can be very serious, but they typically have a more subacute course and their overall frequency and immediate mortality risk are usually lower than acute pyogenic bacterial disease. The need for immediate empiric antimicrobial therapy and supportive critical care reflects this high fatality risk.

Question 5

“College dormitory meningitis” is commonly caused by?

Accepted Answer

Answer reason: Close-contact living (e.g., dormitories, military barracks) increases transmission of respiratory droplets and nasopharyngeal carriage, which classically predisposes to meningococcal meningitis. The organism most associated with outbreaks in adolescents and young adults in crowded settings is an encapsulated gram-negative diplococcus. Rapid progression to sepsis and petechial/purpuric rash is a hallmark, making prompt recognition and prophylaxis of close contacts important. Other common bacterial causes like pneumococcus are more associated with older adults or post-sinusitis/otitis rather than crowding-related outbreaks. Vaccination (MenACWY and, in many settings, MenB) targets this high-risk population.

Question 6

Which diagnostic test confirms Cryptococcal meningitis?

Accepted Answer

Answer reason: This directly establishes the presence of Cryptococcus infection even when organism burden is low. VDRL is used for neurosyphilis evaluation, not fungal meningitis. ELISA for HIV assesses HIV infection risk/association but does not diagnose cryptococcal disease, and Gram stain is often insensitive for Cryptococcus compared with antigen detection.

Question 7

Most common cause of neonatal meningitis is?

Accepted Answer

Answer reason: Group B Streptococcus (Streptococcus agalactiae) is a leading cause of early-onset neonatal sepsis and meningitis, which is why routine maternal GBS screening and intrapartum prophylaxis are emphasized. E. coli is also an important neonatal pathogen, particularly in preterm infants, but it is generally less common overall than GBS. Neisseria meningitidis and Streptococcus pneumoniae are more typical causes outside the neonatal period and are not the predominant etiologies in newborns.

Question 8

The vector of Dengue fever is –?

Accepted Answer

Answer reason: This matches the epidemiology of dengue outbreaks and the known principal vector in most endemic regions. Culex species are more classically linked to diseases like lymphatic filariasis and West Nile/Japanese encephalitis transmission patterns, not dengue. Anopheles is the malaria vector, and sand flies transmit leishmaniasis, making them incorrect for dengue.

Question 9

Causative agent for common cold —?

Accepted Answer

Answer reason: These viruses spread via respiratory droplets and direct contact, leading to nasal congestion, rhinorrhea, and sore throat without the systemic features typical of more invasive infections. In contrast, Plasmodium causes malaria (a protozoal blood infection), Vibrio are bacteria classically linked to gastrointestinal disease, and Candida is a fungus associated with mucocutaneous and opportunistic infections. Therefore, the option that matches the typical etiologic agent of the common cold is the viral choice.

Question 10

Disease caused by Plasmodium —?

Accepted Answer

Answer reason: The organism has a liver stage followed by an erythrocytic stage, producing fever, hemolysis, and anemia. Dengue is caused by a flavivirus, not a protozoan parasite. Typhoid is due to Salmonella Typhi and cholera is due to Vibrio cholerae, both bacterial diseases rather than Plasmodium infection.

Question 11

Rabies affects mainly the –?

Accepted Answer

Answer reason: The hallmark disease process is encephalitis, producing agitation, hydrophobia, autonomic instability, and progressive neurologic dysfunction. This directly makes the brain the primary organ affected, whereas lungs, liver, and kidneys are not the main target tissues in rabies pathogenesis. End-organ failure can occur late in severe illness, but it is secondary to the primary CNS infection.

Question 12

Rotavirus vaccine prevents -?

Accepted Answer

Answer reason: The oral live-attenuated rotavirus vaccines primarily reduce severe disease, hospitalizations, and deaths from rotavirus gastroenteritis in infants. The other options are caused by unrelated pathogens (e.g., Plasmodium for malaria, Mycobacterium tuberculosis for TB) and are prevented by different vaccines or interventions. Therefore, the prevention target most directly matched to rotavirus immunization is severe infantile diarrheal illness.

Question 13

Which vaccine prevents shingles?

Accepted Answer

Answer reason: The recombinant zoster vaccine is designed specifically to prevent herpes zoster and related complications such as postherpetic neuralgia. The varicella vaccine primarily prevents primary varicella (chickenpox) rather than serving as the standard preventive vaccine for shingles in adults. MMR and HPV target unrelated viruses and therefore do not prevent VZV reactivation.

Question 14

Influenza vaccine protects against —?

Accepted Answer

Answer reason: The influenza vaccine is designed to induce protective immune responses against circulating influenza virus strains responsible for seasonal influenza. It does not generate immunity against bacterial infections like tuberculosis or unrelated viruses such as HIV or hepatitis viruses. A common exam trap is assuming “flu-like illness” prevention equals broad respiratory protection, but this vaccine’s protection is specific to influenza viruses.

Question 15

Which virus causes rabies?

Accepted Answer

Answer reason: Rabies is caused by a Lyssavirus, which belongs to the Rhabdoviridae family and is classically associated with neurotropic infection leading to fatal encephalitis. This family includes enveloped, negative-sense single-stranded RNA viruses, aligning with rabies virology. Paramyxoviruses more commonly cause respiratory illnesses and some CNS infections (e.g., measles), but not rabies. Togaviruses and flaviviruses are typically arthropod-borne viruses and are not the etiologic agents of rabies.

Question 16

Which mosquito breeds in clean water?

Accepted Answer

Answer reason: Mosquito breeding habitats are classically distinguished by the type of water they prefer, which is a key epidemiologic point for vector-borne disease control. Anopheles species typically breed in clean, fresh water such as clear pools, slow-moving streams, and rice fields, aligning with their association with malaria transmission. In contrast, Culex commonly breeds in polluted or stagnant water (e.g., drains, sewage), making it a frequent distractor when “clean water” is specified. Aedes often uses small artificial containers with relatively clean water, but exam convention most strongly links “clean water breeding” to Anopheles, while Mansonia is associated with aquatic vegetation.

Question 17

Causative organism of Tuberculosis is –?

Accepted Answer

Answer reason: The etiologic agent is a slow-growing mycobacterium with a lipid-rich cell wall (mycolic acids), which explains acid-fast staining and intrinsic resistance to many antibiotics. Streptococcus and Staphylococcus aureus commonly cause acute pyogenic infections rather than chronic granulomatous disease. Bacillus subtilis is typically an environmental organism and not a common cause of human TB.

Question 18

Causative organism of AIDS is –?

Accepted Answer

Answer reason: The direct causative pathogen is therefore the retrovirus HIV, not hepatitis viruses or herpes simplex virus. HBV and HCV primarily cause viral hepatitis and chronic liver disease rather than the defining opportunistic infections and malignancies seen in AIDS. HSV can cause recurrent mucocutaneous lesions and may be more severe in immunocompromised patients, but it is not the underlying cause of AIDS.

Question 19

Which of the following is a common co-infection with HIV?

Accepted Answer

Answer reason: Mycobacterium tuberculosis is the most common and clinically important co-infection worldwide in people living with HIV and is a leading cause of mortality in this population. Co-infection also accelerates progression of both diseases and changes diagnostic patterns (more extrapulmonary and smear-negative TB). The other listed infections can occur but are not classically emphasized as common persistent co-infections driving morbidity and mortality in HIV the way TB is.

Question 20

Cholera is caused by –?

Accepted Answer

Answer reason: The toxin increases intracellular cAMP in enterocytes, driving massive chloride and water secretion leading to profuse “rice-water” stools and rapid dehydration. The organism classically responsible is a curved, motile, gram-negative rod transmitted via contaminated water or food. Salmonella and E. coli can cause gastroenteritis, but they are not the defining etiologic agent of classic epidemic cholera. Staphylococcus more commonly causes toxin-mediated food poisoning with vomiting rather than severe watery diarrhea and dehydration.

Question 21

Disease caused by Plasmodium falciparum –?

Accepted Answer

Answer reason: Plasmodium falciparum is the most virulent species and is classically responsible for severe malaria due to high parasitemia and cytoadherence causing microvascular obstruction. Kala-azar is visceral leishmaniasis caused by Leishmania donovani complex, while dengue is a flavivirus infection transmitted by Aedes mosquitoes. Filariasis is caused by nematodes (e.g., Wuchereria bancrofti) rather than protozoa.

Question 22

Causative organism of Typhoid fever is –?

Accepted Answer

Answer reason: Typhoid (enteric) fever is caused by systemic infection following ingestion of Salmonella enterica serovar Typhi, which invades intestinal mucosa and disseminates via the reticuloendothelial system. This organism is classically associated with prolonged fever, abdominal symptoms, relative bradycardia, and potential intestinal perforation from Peyer patch necrosis. Escherichia coli is more commonly linked to diarrheal disease, UTIs, and sepsis rather than classic enteric fever. Vibrio cholerae causes acute watery diarrhea with severe dehydration, and Shigella dysenteriae causes bacillary dysentery with bloody diarrhea, not typhoid fever.

Question 23

Causative organism of Typhus is –?

Accepted Answer

Answer reason: g., lice for epidemic typhus, fleas for murine typhus, chiggers for scrub typhus). The genus/classic etiologic agents are Rickettsia (and closely related Orientia for scrub typhus), making this the best match among the options. Vibrio classically causes watery diarrheal illnesses such as cholera, not typhus. Mycobacterium and Staphylococcus are associated with tuberculosis/atypical mycobacterial infections and skin/soft-tissue or toxin-mediated infections, respectively, which do not fit the typhus syndrome.

Question 24

Malaria is caused by —?

Accepted Answer

Answer reason: The disease involves a liver stage followed by cyclic red blood cell invasion, explaining characteristic periodic fevers and hemolysis. Viral, bacterial, and fungal pathogens do not produce the Plasmodium life cycle or its erythrocytic parasitism. Therefore the etiologic agent category that best fits malaria is protozoa.

Question 25

Rabies is caused by –?

Accepted Answer

Answer reason: This directly matches the option identifying an RNA virus as the causative agent. Bacterial and fungal organisms do not cause rabies, and rabies is not a DNA virus infection. Recognizing the pathogen type is clinically important because prevention relies on post-exposure prophylaxis and vaccination rather than antibacterial or antifungal therapy.

Question 26

Leprosy is caused by –?

Accepted Answer

Answer reason: The organism responsible is an obligate intracellular pathogen that replicates slowly, explaining the long incubation and chronic course. The other options cause different classic diseases (e.g., cholera causes acute watery diarrhea; S. typhi causes enteric fever) and do not primarily target peripheral nerves. Recognizing the specific causative bacterium is central to appropriate diagnosis and multidrug therapy selection.

Question 27

Causative organism of Pneumonia is —?

Accepted Answer

Answer reason: It colonizes the nasopharynx and can invade the lower respiratory tract, producing lobar consolidation and typical pneumococcal features such as rust-colored sputum. While E. coli can cause pneumonia in hospitalized, ventilated, or debilitated patients, it is not the prototypical general cause asked in basic exams. Bacillus anthracis primarily causes inhalational anthrax, and Mycobacterium is classically associated with tuberculosis rather than acute typical pneumonia.

Question 28

Causative organism of Diphtheria –?

Accepted Answer

Answer reason: The pathogen responsible is identified by its characteristic diphtheria toxin, which inhibits protein synthesis (EF-2) and leads to local tissue necrosis and potential myocarditis/neuropathy. The other options are classic causes of different diseases: tetanus (spastic paralysis), diarrheagenic infections/UTIs or sepsis, and cholera (profuse watery diarrhea). Therefore the organism that matches the disease entity and its toxin-mediated pathology is the one listed in option A.

Question 29

"Bull’s neck" appearance is seen in –?

Accepted Answer

Answer reason: The diphtheria exotoxin leads to intense local inflammation in the pharynx and regional nodes, producing neck swelling and sometimes airway compromise. This clinical description classically differentiates diphtheria from pertussis (paroxysmal cough) and tetanus (muscle rigidity/spasms) which do not cause prominent cervical swelling. Recognizing this sign is important because diphtheria requires urgent antitoxin plus antibiotics and airway monitoring.

Question 30

A patient with fever, jaundice, and “tea-colored urine” after swimming in contaminated water likely has?

Accepted Answer

Answer reason: Leptospira interrogans is a zoonotic spirochete transmitted through water contaminated with animal urine, commonly after freshwater exposure. Severe disease (Weil disease) classically causes fever with jaundice and dark/tea-colored urine from hepatic dysfunction, hemolysis, and renal involvement. Malaria can cause hemolysis and dark urine, but it is acquired via Anopheles mosquitoes rather than swimming in contaminated water. Schistosomiasis is water-associated, but it more typically presents with swimmer’s itch and later hematuria or portal hypertension rather than this acute jaundice/tea-colored urine triad.

Question 31

The study of fungi is –?

Accepted Answer

Answer reason: Fungi are a distinct class of microorganisms (e.g., yeasts and molds), and their structure, reproduction, and diseases are covered under a dedicated discipline. The term for this discipline is derived from the Greek “mykes,” meaning fungus. By contrast, virology is the study of viruses, parasitology focuses on parasites (protozoa/helminths), and ecology addresses organism–environment interactions rather than a single organism group.

Question 32

The advanced practice nurse is counseling a 21-year-old patient on lifestyle changes to decrease the risk of urinary tract infections. Which microorganism, commonly responsible for these infections, should be emphasized during the education session?

Accepted Answer

Answer reason: Most uncomplicated community-acquired UTIs occur via ascending infection from periurethral flora, and enteric gram-negative bacilli are the predominant pathogens. This organism is the leading cause because it commonly colonizes the gastrointestinal tract and has adhesins (fimbriae) that facilitate attachment to uroepithelium. The other listed organisms are classically associated with different syndromes (e.g., pneumonia/meningitis, antibiotic-associated colitis, pulmonary/latent infection) and are not the usual causes of routine cystitis in a healthy young adult. Patient education on UTI prevention is therefore best anchored to reducing fecal-to-urethral contamination and behaviors that promote ascent of this enteric organism.

Question 33

Hib vaccine protects against —?

Accepted Answer

Answer reason: This prevents invasive Hib disease such as meningitis, epiglottitis, and bacteremia in young children. It does not protect against hepatitis viruses or influenza virus, which require different vaccines targeting viral antigens. “Pneumonia virus” is not a specific pathogen and pneumonia can be caused by many organisms, so it is not what Hib vaccination specifically covers.

Question 34

Which virus causes dengue fever?

Accepted Answer

Answer reason: The other listed viruses can cause febrile illnesses with overlapping symptoms but are distinct pathogens: Zika is associated with congenital infection and neurologic complications, chikungunya classically causes severe polyarthralgia, and yellow fever causes viscerotropic disease with jaundice and hemorrhage. Identifying the specific etiologic agent is key for diagnosis, public health reporting, and anticipating complications such as dengue hemorrhagic fever/shock syndrome. Therefore the causative virus for dengue fever is the dengue virus.

Question 35

A nurse is caring for a patient with a chief complaint of an itchy scalp and hair loss. The nurse notes a ring shaped rash on the patient’s head during the initial assessment. Which infection does the nurse suspect?

Accepted Answer

Answer reason: The presentation of an itchy scalp with hair loss plus a ring-shaped rash on the head best matches a scalp dermatophyte infection. In contrast, tinea corporis affects glabrous skin of the trunk/limbs, tinea cruris involves the groin, and tinea pedis involves the feet, none of which typically present with scalp hair loss. The combination of location (head/scalp) and alopecia is the key discriminator.

Question 36

Which of the following organisms most commonly causes community-acquired pneumonia in adults?

Accepted Answer

Answer reason: This organism is classically the leading cause across outpatient and inpatient CAP presentations, producing lobar pneumonia and being a primary target of empiric therapy and vaccination strategies. Haemophilus influenzae is a common cause particularly in smokers and patients with COPD, but it is not the overall most common in adults. Klebsiella pneumoniae and Staphylococcus aureus are more associated with specific risk contexts (alcohol use/aspiration or post-influenza/severe disease) rather than being the most common general CAP cause.

Question 37

A patient diagnosed with syphilis presents with a widespread rash and flu-like symptoms. As the nurse, you know that these symptoms are most consistent with which stage of syphilis?

Accepted Answer

Answer reason: Primary syphilis is typically characterized by a painless chancre at the inoculation site rather than widespread rash and systemic illness. Latent syphilis is defined by absence of clinical signs despite seroreactivity. Tertiary disease develops years later and presents with gummatous lesions, cardiovascular involvement, or neurosyphilis rather than an acute generalized rash syndrome.

Question 38

An adult woman is admitted to an isolation unit in the hospital after tuberculosis was detected during a pre-employment physical. Although frightened about her diagnosis, she is anxious to cooperate with the therapeutic regimen. The teaching plan includes information regarding the most common means of transmitting the tubercle bacillus from one individual to another. Which contamination is usually responsible?

Accepted Answer

Answer reason: These droplet nuclei are generated by coughing, sneezing, speaking, or singing and are the usual route for person-to-person transmission. Fomite transmission (e.g., eating utensils, hands) is not a typical mechanism for TB infection because the organism is acquired by inhalation into the lungs rather than by casual contact. Milk products are associated with gastrointestinal infection from M. bovis in unpasteurized dairy and are not the usual route for modern pulmonary TB transmission.

Question 39

A 45-year-old female patient presents to the outpatient clinic with complaints of intermittent joint pain, fatigue, and cognitive disturbances. She recalls having a rash resembling a “bull’s-eye” a few weeks ago after a hiking trip in a tick-endemic area. The nurse, upon reviewing her medical history, notes a recent diagnosis of Lyme disease. Given the patient’s presentation and history, which of the following microorganisms is most likely responsible for her condition?

Accepted Answer

Answer reason: The organism that matches this epidemiology (tick-endemic hiking exposure) and clinical pattern is the spirochete responsible for Lyme. In contrast, Streptococcus pyogenes is associated with pharyngitis/impetigo and post-streptococcal immune complications rather than a tick-associated bull’s-eye lesion. Bacillus anthracis and Enterococcus faecalis have different exposure risks and typical syndromes, making them poor fits for this presentation.

Question 40

An infection in a central venous access device is not eliminated by giving antibiotics through the catheter. How would bacterial glycocalyx contribute to this?

Accepted Answer

Answer reason: Bacterial glycocalyx promotes adherence to surfaces and biofilm formation on indwelling catheters, creating a physical and chemical barrier that limits antibiotic penetration and activity. Biofilms also slow bacterial metabolism and increase persister-cell populations, reducing the effectiveness of many antimicrobials that target active growth. In addition, the matrix impairs opsonization and phagocytosis, helping organisms evade host immune clearance. A common misconception is that the matrix directly “neutralizes” antibiotics; instead, it mainly protects organisms by blocking access and altering local conditions rather than inactivating the drug molecule.

Question 41

Corinne is experiencing diarrhea after consuming her prescribed antibiotics for the whole week. This is because?

Accepted Answer

Answer reason: Antibiotics can disrupt normal gut microbiota, reducing colonization resistance and altering carbohydrate metabolism and bile acid handling, which commonly leads to antibiotic-associated diarrhea. Loss of protective commensals allows overgrowth of opportunistic organisms (including toxin-producing pathogens such as C. difficile) and increases intestinal motility and secretion. “Gastric flora” is less accurate because the key effect is in the intestinal/colonic microbiome rather than the stomach. The other options describe mechanisms that are not the typical primary cause of diarrhea after a week of antibiotics.

Question 42

An HIV-positive client who has been started on highly active antiretroviral therapy (HAART) came back for a follow-up checkup. Which of the following will be the most helpful in determining the response to therapy?

Accepted Answer

Answer reason: This marker changes earlier than immune recovery and correlates strongly with long-term clinical outcomes and transmission risk. Screening/confirmatory tests like rapid antigen testing or Western blot are designed for diagnosis, not longitudinal monitoring of therapy effectiveness. A general white blood cell count is nonspecific and can be influenced by intercurrent infections, medications, or bone marrow effects, so it does not reliably reflect antiretroviral efficacy.

Question 43

A child with measles developed fever and general weakness after being exposed to another child with rubella. In what stage of infectious process does this child belongs?

Accepted Answer

Answer reason: The prodromal stage is characterized by early, nonspecific manifestations such as low-grade fever, malaise, and generalized weakness that occur after the incubation period but before the full disease-specific clinical picture. The child’s fever and generalized weakness fit this early symptomatic phase rather than the asymptomatic incubation stage. The illness period would be expected to show the most severe and characteristic signs of the disease (e.g., prominent rash and other defining findings), which are not described here. Convalescence refers to recovery with symptom resolution and return toward baseline, which also does not match the presentation.

Question 44

50 year old mailman carried a mail with anthrax powder in it. A minute after exposure, he still hasn't developed any signs and symptoms of anthrax. In what stage of infectious process does this man belongs?

Accepted Answer

Answer reason: Because only a minute has passed and the client remains asymptomatic, he is still in the phase where the organism may be present but clinical manifestations have not started. The prodromal period begins when vague, nonspecific symptoms first appear, which is not the case here. The illness and convalescent periods require established symptoms and subsequent recovery, respectively, so they do not fit an immediately post-exposure asymptomatic state.

Question 45

Which of the following pathologic processes is often associated with aseptic meningitis?

Accepted Answer

Answer reason: Viruses such as mumps (and enteroviruses) can inflame the meninges and produce the typical CSF pattern of lymphocytic predominance with relatively normal glucose compared with bacterial meningitis. Pyogenic brain abscesses are bacterial, typically causing a focal intracranial infection rather than an “aseptic” meningeal syndrome. Ischemic stroke and post-traumatic ventricular irritation may cause neurologic symptoms but are not the common pathologic processes classically associated with aseptic meningitis.

Question 46

A patient was positive for hepatitis B virus, although she had the disease 4 years ago and now is symptom free. What is the nurse aware is true regarding this patient?

Accepted Answer

Answer reason: Chronic HBV can persist with an asymptomatic phase yet still be transmissible because viral antigens/DNA may remain detectable. This makes the client a potential source of infection even when clinically well, guiding counseling on prevention and follow-up. “Noninfectious hepatitis” is incorrect because lack of symptoms does not mean lack of infectivity in HBV. The risk for hepatitis E is unrelated to being HBV-positive and is primarily linked to fecal-oral exposure rather than persistence after HBV.

Question 47

During the window period of patient with AIDS, best diagnostic test is;?

Accepted Answer

Answer reason: Nucleic acid testing detects viral RNA directly and becomes positive earlier than serologic assays, making it the most sensitive approach in early infection. ELISA and rapid tests primarily detect antibodies (or sometimes antibody/antigen depending on assay) and are less reliable in the earliest phase. Western blot is a confirmatory antibody test and is therefore also limited by delayed seroconversion. Early RNA detection supports prompt diagnosis, counseling, and linkage to treatment while reducing transmission risk.

Question 48

Which of the following opportunistic infections is most likely to cause blindness in A.I.D.S. clients with a CD4 count of less than 200?

Accepted Answer

Answer reason: CMV retinitis is a classic AIDS-defining opportunistic infection that can rapidly progress to irreversible vision loss if untreated. The other options more characteristically cause gastrointestinal disease (cryptosporidiosis), pulmonary disease (Pneumocystis pneumonia), or disseminated fungal illness rather than primary blinding retinitis. Therefore, CMV is the infection most associated with blindness risk in this setting.

Question 49

Vaccine preventable neonatal disease is?

Accepted Answer

Answer reason: Protective maternal IgG crosses the placenta and reduces risk during the newborn period. Measles typically affects older infants/children and is not considered a neonatal disease in standard epidemiology. Pertussis is vaccine-preventable but the primary neonatal prevention strategy is maternal Tdap and cocooning; the prototypical “neonatal vaccine-preventable disease” tested is neonatal tetanus.

Question 50

TB is considered a ___ disease?

Accepted Answer

Answer reason: This makes it a bacterial disease rather than viral, since viruses require host cells for replication and are not treated with antibiotics. It is not fungal because the causative organism is not a yeast or mold and the standard management is not antifungal therapy. It is not genetic because it is acquired via airborne transmission rather than inherited through DNA.

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