| surveillance of lyme disease in the united states, 1982. | lyme disease is a tick-borne illness that has been reported from three regions in the united states--the northeast, midwest, and west--which correspond to the distribution of the recognized vectors of the disease, ixodes dammini and ixodes pacificus. in 1982, a surveillance system designed to define the morbidity and geographic distribution for lyme disease by using a clinical case definition received information on 491 definite cases and 38 probable cases. of the definite cases, 489 were acquir ... | 1985 | 3998509 |
| antibodies to spotted fever-group rickettsiae in dogs and prevalence of infected ticks in southern connecticut. | blood samples and ticks were obtained from dogs to assess canine exposure to spotted fever-group (sfg) rickettsiae during 1978-1980 in southern connecticut. of the 1,576 dog sera screened by microimmunofluorescence. 174 (11.0%) contained specific antibodies at titers greater than or equal to 1:64 against rickettsia montana (n = 34), r rickettsii (n = 31), r rhipicephali (n = 19), or the unclassified 369-c rickettsia (n = 90). end points greater than or equal to 1:8,192 to r rickettsii and to r r ... | 1982 | 6803626 |
| molecular characterization of a novel rickettsia species from ixodes scapularis in texas. | a novel rickettsia species of undetermined pathogenicity was detected in ixodes scapularis. dna sequencing showed the highest nucleotide sequence similarities with r. australis for the 17 kda gene, r. helvetica for glta, and r. montana for rompa. the new organism, provisionally designated as genotype cooleyi, is highly divergent in three conserved genes from recognized rickettsia species. | 1998 | 9621204 |
| prevalence of infection in ticks submitted to the human tick test kit program of the u.s. army center for health promotion and preventive medicine. | in 1997, ticks removed from humans and received alive by the tick-borne disease laboratory of the u.s. army center for health promotion and preventive medicine (usachppm) were tested for pathogens by polymerase chain reaction (pcr). thirty-three of 222 (15%) amblyomma americanum (l.) dnas produced amplicons of the expected size of ehrlichia chaffeensis anderson, dawson & wilson and 26/222 (12%) produced amplicons indicating borrelia burgdorferi johnson, schmid, hyde, steigalt & brenner. five (2% ... | 2001 | 11268694 |