LIVESTOCK TICK RESEARCH PROGRAM

Evaluation covers the period through 1/14/80 and is based on a Research Advisory Committee team review. Significant progress has been made in research and work plan for the second year should lead to further accomplishments. Studies are well designed and are being carried out by ICIPE in collaboration with the Kenya Agriculture Research Institute and International Laboratory for Research on Animal Diseases. Ecological research has involved controlled introduction of known numbers of Rhipicephalus appendiculatus into experimental paddocks of various sizes and pasturing of European cattle (Bos taurus) in these paddocks. Field studies have been made of experimental tick population fluctuations, persistence, survival, and feeding patterns, and of the effects of molasses grass on ticks. Physiological research has: (1) evaluated the possible use of certain insect hormones and anti-hormones as tick control agents; (2) identified endocrine secretions and elucidated the roles of these hormones in growth, development, and reproduction; and (3) studied tick pheromones and their effects on clustering and mating behavior. Immunological research has involved developing an experimental skin test to identify and measure host cattle immunity against tick infestation. Also, controlled studies have shown that host animals develop resistance following prolonged exposure to R. appendiculatus infestations. ICIPE"s training outputs continue to grow, both in regard to training of LDC participants (74 through 1979) and of technicians (a high ICIPE priority). It is recommended that AID/DSB/AGR/L consider a new proposal from ICIPE to expand the immunological studies now being conducted.