Serosurvey of Chlamydia psittaci infections among livestock and human beings employing complement fixation test

To assess the sero-positivity for Chlamydia psittaci infections during 1992-96, a total of 3286 serum samples from sheep, goats, cattle, pigs, buffaloes, rabbits and human beings were tested by complement fixation test. An overall percentage of sere-positivity in sheep and goats was 18.50 and 42.86, respectively, while that of sero-reactivity was 29.39 and 59.58. Among the sheep imported from U.S.A, the first consignment of 195 sheep was found to be sere-negative, whereas, 440 sheep from other consignments showed sere-positivity of 12.04 per cent. The sero-positivity for Chlamydia psittaci infection in culled pigs (36.36) was higher than pigs at organized farms (21.27%). The antibody titre of a human serum was not enough to consider it as positive for chlamydiosis while the remaining serum samples were negative.