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  • Title: Ownership of cats or dogs does not increase exposure to Rickettsia typhi.
    Author: Wiggers RJ, Stewart RS.
    Journal: Tex Med; 2002 Jun; 98(6):56-7. PubMed ID: 12073903.
    Abstract:
    In the United States, murine typhus (Rickettsia typhi) is endemic in southern California and South Texas. Evidence indicates the natural host/vector system is the opossum and cat flea, the most common flea on both cats and dogs, and speculation suggests that pet contact may pose a risk for R typhi exposure. Serum from 140 subjects was tested for rickettsial antibodies by an enzyme-linked immunosorbent assay that used an R typhi antigen. Each subject was asked about pet contact status and placed in one of the following groups: owners, non-owners but with regular contact (more than 3 times per week), non-owners with irregular contact (fewer than 3 times per week), or non-owners with no contact. Overall, 15.7% of sera were positive for antirickettsia IgG. Of owners or those with regular contact, 14 of 96 (14.6%) were seropositive, while 8 of 44 (18.2%) of non-owners or those with irregular contact were seropositive. A chi-square test showed no significant difference among these groups (P > .5). We conclude that pet ownership or regular contact with pets is not a risk factor for exposure to Rickettsia typhi.
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