The peak age group of HHV6 infection is

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Question 1 of 5

The peak age group of HHV-6 infection is

A. in newborns, acquired as a congenital infection B. 0-3 years C. 5-15 years D. Over 13 years

Correct Answer: B

Rationale: HHV-6 (roseola) peaks in children 6 months to 3 years.

Question 2 of 5

Which is not associated with papillomaviruses?

A. Common skin warts B. Laryngeal papillomatosis C. Condylomata acuminata D. All of the above are associated with papillomaviruses

Correct Answer: D

Rationale: All listed conditions are associated with papillomaviruses.

Question 3 of 5

Which describes the recommended use of HRIG for postexposure rabies prophylaxis in the United States?

A. One half of the HRIG dose at the exposure site, the remainder at another intramuscular site, always with rabies vaccine B. As much of the HRIG dose as possible at the exposure site, the remainder at another intramuscular site, always with rabies vaccine C. One half of the HRIG dose at the exposure site, the remainder at another intramuscular site, with rabies vaccine for high-risk bites D. As much of the HRIG dose as possible at the exposure site, the remainder at another intramuscular site, with rabies vaccine for high-risk bites

Correct Answer: B

Rationale: CDC recommends infiltrating as much HRIG as possible around the wound, with the rest IM, alongside vaccine.

Question 4 of 5

Which is not true concerning HIV infection?

A. HIV suppression is best achieved by regularly rotating antiretroviral regimens. B. Therapy can reduce HIV burden to undetectable levels. C. Viral burden predicts disease progression. D. CD4 cell counts reflect the risk of opportunistic infections.

Correct Answer: A

Rationale: Rotating regimens is not a standard strategy; consistent combination therapy is key.

Question 5 of 5

A 4-year-old child presents with acute onset of colicky abdominal pain, blood-stained diarrhea, and tenesmus. There is no fever. Trophozoites are seen in the stool. The family has recently returned from a trip to Mexico. Which etiology should be suspected?

A. Giardia lamblia B. Entamoeba dispar C. Entamoeba histolytica D. Naegleria

Correct Answer: C

Rationale: Entamoeba histolytica causes amebic dysentery with bloody diarrhea and trophozoites in stool.

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The peak age group of HHV-6 infection is

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