Nokea
The following contribute to the natural immunity transmitted in breast milk:
- A. Macrophages
- B. Natural killer cells
- C. Lysozyme
- D. Secretory IgA
Correct Answer: D
Rationale: Secretory IgA in breast milk plays a crucial role in providing passive immunity to the infant by protecting mucosal surfaces from pathogens.
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Concerning tetanus:
- A. The infection is usually fatal
- B. The muscle spasms are often localized
- C. Immunization confers lifelong immunity
- D. Incubation period is usually weeks
Correct Answer: C
Rationale: Immunization with the tetanus toxoid provides long-lasting immunity, though booster shots are recommended to maintain protection.
Routine hearing tests in the community are usually based on:
- A. Distraction testing
- B. Auditory brainstem responses
- C. Evoked potentials
- D. Object discrimination
Correct Answer: A
Rationale: Distraction testing is a common method used in community settings to assess hearing in young children.
All of the following are true regarding intussusception in children, except
- A. It is more common in boys than girls
- B. Adeno virus C has been implicated
- C. Urgent barium meal follow-through is the investigation of choice
- D. Postoperative intussusception is commonly ileoileal
Correct Answer: C
Rationale: Urgent barium meal follow-through is not the investigation of choice for intussusception; ultrasound is preferred for diagnosis.
The following statements about immunoglobulins are false:
- A. IgG is not transferable across the placenta
- B. IgM is usually a pentamer
- C. IgE levels are raised in parasitic infestations
- D. IgD is important in antibody dependent cytotoxicity
Correct Answer: A
Rationale: IgG is not transferable across the placenta: IgG is the only immunoglobulin that crosses the placenta to provide passive immunity to the fetus.
Regarding bronchial asthma:
- A. Mortality has shown an increase during the past three decades
- B. The incidence is greater in males than females
- C. Nocturnal cough is a recognised feature
- D. Post-RSV bronchial hyperreactivity is strongly associated with atopy
Correct Answer: C
Rationale: Nocturnal cough is a common and recognized feature of bronchial asthma, often disrupting sleep.