Variation in Aedes aegypti larval indices over a one year period in a neighborhood of Mérida, Yucatán, México.

Surveys for Aedes aegypti larvae were conducted to provide an estimate of the magnitude and timing of seasonal variations in larval indices in one colonia in Mérida, Yucatán, México, and to assess how the proportion of disposable and non-disposable containers as larval production sites varies. Breteau indices exceeded 200 during the months of July and August, and disposable containers were important year-round larval production sites.