EXPERIMENTAL-INFECTION OF KIDS WITH OESTR US-OVIS FIRST-INSTAR LARVAE

A protocol of experimental infection with OE strus ovis larvae L1 was applied to kids in order to study their susceptibility to OE strus ovi s. Two-month-old kids, born and raised indoors during winter, were inf ected with single or repeated administrations of OE strus ovis L1. Two or three months later, the kids were slaughtered and larvae harvested from their nasal cavities. Following a single administration of 30 L1 , 8.3 and 3.3% of the larvae survived after two and three months respe ctively. After eight repetitive infections in two months with the same number of larvae (30 L1), only 2.2% survived. Over a three months per iod, ie, eleven repetitive infections with a total of 61 L1, only 1.4% were found at the necropsies. This experiment indicates that goats ar e not very susceptible to OE strus ovis infection.