Accession Number:

AD0644973

Title:

STUDY OF THE ROLE OF TICKS OF THE GENERA DERMACENTOR AND HAEMAPHYSALIS IN TRANSMISSION OF BRUCELLOSIS,

Descriptive Note:

Corporate Author:

NAVAL MEDICAL RESEARCH UNIT NO 3 CAIRO (EGYPT) DEPT OF MEDICAL ZOOLOGY

Report Date:

1960-01-01

Pagination or Media Count:

23.0

Abstract:

In a comparative study of infection of ixodid ticks of the genera Dermacentor and Haemaphysalis with brucelleae of the types melitensis and bovis, the highest 82 infection was obtained with strain melitensis. Ticks infected with freshly isolated strain Br. bovis No. 7, produced positive results of infection in guinea pigs in 65.3 of cases, and infection with strain Br. bovis No. 28, isolated many years ago, in only 25 of cases. Haemaphysalis ticks showed very high susceptibility to infection with brucelleae. From 12 test with three strains of brucelleae, only one gave a negative result. The two tests with strain Br. bovis No. 28 gave positive results in all investigations. Transovarial transmission of brucella of the type melitensis by H. warburtoni female through eggs to larvae was proved. Strain Br. bovis K-4 was isolated by biological test from D. pavlovskyi females collected from sheep. In experiments on guinea pigs infected with Br. bovis during the appearance of brucellosis in the form of local infection of the lymphatic node, an agglutination reaction was absent in both cases and CF was positive in only one case. Author

Subject Categories:

  • Biology
  • Microbiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE