Document Detail

Prevalence of naturally occurring Dirofilaria immitis infection among nondomestic cats housed in an area in which heartworms are endemic.
MedLine Citation:
PMID:  16013550     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine prevalences of heartworm exposure (ie, positive heartworm antibody test results) and heartworm infection (ie, positive heartworm antigen test results or identification of mature heartworms at necropsy) among nondomestic cats housed in an area in rural North Carolina where Dirofilaria immitis is known to be endemic and among nondomestic cats housed in areas with a low prevalence of dirofilariasis or in an area considered to be free from heartworms. DESIGN: Cross-sectional prevalence survey. ANIMALS: 97 nondomestic cats in North Carolina (study population) and 29 nondomestic cats in Colorado; Queensland, Australia; or Auckland, New Zealand (control population). PROCEDURE: Results of serologic tests and postmortem examinations were reviewed. RESULTS: Results of heartworm antibody tests were positive for 57 of 75 (76%) study cats and 1 of 29 (3%) control cats. Male study cats had a significantly higher risk of heartworm exposure than did female study cats (relative risk, 1.3). Results of heartworm antigen tests were negative for all 47 study cats and 16 control cats that were tested. Postmortem examinations were performed on 21 study cats, and 1 (5%) was found to be infected with heartworms. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggested that nondomestic cats housed outdoors in the southeastern United States are at risk for heartworm exposure and infection, with male cats having a greater risk of exposure than female cats.
Clarke Atkins; Anneke Moresco; Annette Litster
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American Veterinary Medical Association     Volume:  227     ISSN:  0003-1488     ISO Abbreviation:  J. Am. Vet. Med. Assoc.     Publication Date:  2005 Jul 
Date Detail:
Created Date:  2005-07-14     Completed Date:  2005-08-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7503067     Medline TA:  J Am Vet Med Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  139-43     Citation Subset:  IM    
Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA.
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MeSH Terms
Animals, Wild
Antibodies, Helminth / blood
Colorado / epidemiology
Cross-Sectional Studies
Dirofilaria immitis / immunology*
Dirofilariasis / epidemiology*
Felidae / parasitology*
New Zealand / epidemiology
North Carolina / epidemiology
Queensland / epidemiology
Risk Factors
Seroepidemiologic Studies
Serologic Tests / veterinary
Sex Factors
Reg. No./Substance:
0/Antibodies, Helminth

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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