obsolete Centers for Disease Control and Prevention gravid trap true A gravid trap that consists of a pan holding a hay infusion, motorized fan, and collection bag. This trap is designed to attract gravid female arthropods to the infused material, which would serve as an oviposition medium, and then draw them into the bag with the current generated by the fan. The original trap CDC gravid trap (or gravid trap of Reiter) consists of a 3 inch diameter PVC inlet tube housing a 6 V motor, as used in CDC traps, on which is mounted a four-bladed 3 inch counter-clockwise fan. The inlet tube is clamped between two vertical wooden boards that fit over a black plastic box (18.5 x 14.0 x 6.5 inches). A plastic 12 inch long PVC chimney slots into the upper end of the inlet tube. The top half consists of three struts that fit into and support a netting collecting bag. For this the middle of the collecting bag is reinforced with a circular patch of denim cloth. The oviposition attractant is made by adding 1 lb of hay and 1 oz each of dried brewer's yeast and lactalbumen powder to 30 gallons of tap water. This infusion is allowed to mature for 5 days. This original gravid mosquito trap of Reiter suffers from certain limitations, namely up to 10% of the catch of adults is damaged by passing through the fan blades, and adults tend to die of desiccation. [ISBN:9781402066658] CDC gravid trap VSMO:0001510 J Am Mosq Control Assoc. 1988 Dec;4(4):536-8. Centers for Disease Control and Prevention gravid trap term imported