Brucellosis Surveillance - Annual Summary 1978

摘要

In 1978, 172 cases of human brucellosis were reported to the Center for Disease Control, a decrease of 69 cases from the 241 reported in 1977. The decline of cases that has been noted in the United States since 1947, interrupted by the resurgence of cattle-associated cases in 1974, has resumed. Case surveillance reports were received on 161 of the cases, including 127 newly acquired infections (79%), 15 (9%) recrudescent infections, and 19 (12%) for which the patient's prior brucellosis infection status was not reported. For the third time since 1967, less than half of the reported brucellosis cases occurred in meat-processing industry workers. The number of cases acquired from cattle exceeded the number acquired from swine for the fourth consecutive year.