Yellow fever aedes agypti index should be ?
**Core Concept**
The Aedes aegypti index is a measure used to assess the risk of yellow fever transmission in a particular area. It is calculated based on the number of Aedes aegypti mosquitoes per human population. A higher index indicates a higher risk of yellow fever transmission.
**Why the Correct Answer is Right**
The Aedes aegypti index is calculated by dividing the number of Aedes aegypti mosquitoes by the number of human inhabitants in a given area. This ratio is then multiplied by 100 to express it as a percentage. The World Health Organization (WHO) uses the following classification: 5% (high risk) of Aedes aegypti per human population. Therefore, the yellow fever Aedes aegypti index should be 1%.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not provide a specific percentage value, which is necessary for classification of risk.
**Option B:** This option is incorrect because it is too high, indicating a high risk of yellow fever transmission, which may not be the case in all areas.
**Clinical Pearl / High-Yield Fact**
It is essential to note that the Aedes aegypti index is a crucial tool for public health officials to determine the risk of yellow fever transmission and implement control measures accordingly. Understanding this index can help healthcare professionals take appropriate measures to prevent the spread of yellow fever.
**Correct Answer:** C. 1%