Major sign for AIDS surveillance in WHO case definition ?
**Core Concept**
The World Health Organization (WHO) case definition for AIDS surveillance focuses on identifying individuals who are at high risk of progression to AIDS. The major sign for AIDS surveillance is a critical indicator used to identify individuals who may be infected with HIV and require further testing.
**Why the Correct Answer is Right**
The WHO case definition for AIDS surveillance includes a major sign, which is a clinical indicator that is highly suggestive of HIV infection. This sign is a key component of the surveillance definition because it helps to identify individuals who are at high risk of progression to AIDS. The major sign is a critical indicator that is used to trigger further testing for HIV. In the context of AIDS surveillance, the major sign is a critical component of the case definition because it helps to identify individuals who require further testing and treatment.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not represent a major sign for AIDS surveillance. While it may be a symptom of HIV infection, it is not a critical indicator that is used to trigger further testing.
**Option B:** This option is incorrect because it is not a major sign for AIDS surveillance. It may be a symptom of HIV infection, but it is not a critical indicator that is used to trigger further testing.
**Option C:** This option is incorrect because it is not a major sign for AIDS surveillance. It may be a symptom of HIV infection, but it is not a critical indicator that is used to trigger further testing.
**Option D:** This option is incorrect because it is not relevant to AIDS surveillance.
**Clinical Pearl / High-Yield Fact**
The major sign for AIDS surveillance in the WHO case definition is a critical indicator used to identify individuals who require further testing for HIV. This sign is a key component of the surveillance definition and helps to trigger further testing and treatment.
**Correct Answer:** C. Recurring genital ulcers.