Accession Number : AD0706592

Title :   CONTRIBUTION TO THE CHARACTERISTICS OF TICKBORNE RICKETTSIOSIS IN SOUTHEASTERN TURKMENIA,

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

Personal Author(s) : Kulagin,S. M. ; Zhmaeva,Z. M. ; Shekhanov,M. V. ; Pchelkina,A. A.

Report Date : 1970

Pagination or Media Count : 9

Abstract : The presence of natural rickettsial infection in H. asiaticum ticks in nature in a southeastern region in Turkmenia was established. Three rickettsial strains proved to be pathogenic for guinea pigs, white rats, young white mice, and chick embryos. The rickettsiae morphologically closely related to Dermacentroxenus sibircus, the agent of North Asian tickborne rickettsiosis, Dermacentroxenus murinus, the agent of rickettsialpox, and Dermacentroxenus conori, the agent of Marseilles spotted fever. Meanwhile, they differed from these species in the abundance of intranuclear rickettsiae which were practically found in each guinea pig with pronounced changes in the testicular membrane. This has not been observed in other tickborne rickettsiosis infections found in the USSR. White mice weighing 11 g or more were nonsusceptible to the rickettsiae. As is known, rickettsial peritonitis develops in mice in cases of peritoneal infection with agents of North Asian tickborne rickettsiosis, Marseilies fever, and rickettsialpox. Rickettsiae isolated from egg cultures were similar to those of the tickborne spotted fever agent group, but they also retained their property to affect cell nuclei on a wide scale. This tendency to intra nuclear multiplication very closely resembled Dermacentroxenus rickettsi, the agent of tickborne Rocky Mountain spotted fever. (Author)

Descriptors :   (*RICKETTSIA, EPIDEMIOLOGY), DISEASE VECTORS, TICKS, RODENTS, PARASITES, INFECTIOUS DISEASES, SIPHONAPTERA, LIFE CYCLES, LARVAE, USSR

Subject Categories : Microbiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE