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Am. J. Trop. Med. Hyg., 69(5), 2003, pp. 470-472
Copyright © 2003 by The American Society of Tropical Medicine and Hygiene

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SHORT REPORT: A DISSEMINATED INFECTION OF LEISHMANIA MEXICANA IN AN EASTERN WOODRAT, NEOTOMA FLORIDANA, COLLECTED IN TEXAS

CHAD P. MCHUGH, MONTE L. THIES, PETER C. MELBY, LOUDON D. YANTIS, JR., RUSSELL W. RAYMOND, MARIA D. VILLEGAS, AND SARA F. KERR
Air Force Institute for Operational Health, and Air Force Research Laboratory, Brooks City-Base, Texas; Department of Biologic Sciences, Sam Houston State University, Huntsville, Texas; Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas; School of Math, Science and Engineering, University of the Incarnate Word, San Antonio, Texas

 

ABSTRACT

An eastern woodrat (Neotoma floridana) collected in January 2001 near Bedias, Grimes County, Texas, had extensive lesions of both ears and swollen feet. Impression smears and histologic sections demonstrated the presence of Leishmania in both ears and the one foot that was screened. Polymerase chain reaction screening using species-specific primers detected parasites in both ears and all four feet and indicated the parasites were L. mexicana. The detection of L. mexicana in N. floridana represents a new host record in a new ecologic region and may help explain a human infection acquired outside the previously-known range of the disease. Given the geographic distribution of N. floridana and the two other species of Neotoma found naturally infected, enzootic foci of Leishmania could be present over much of the southern United States.

Received April 10, 2003. Accepted for publication August 17, 2003.

Acknowledgments: We thank S. E. Beach for preparation of the impression smears and histologic sections and T. B. Jasek for preparation of Figure 3.

Financial support: This research was supported by the National Institutes of Health through grant GM-55337 to Sara F. Kerr, and by the Department of Health and Human Services (CDC) through grant H75/CCH615041 to Peter C. Melby.

Authors’ addresses: Chad P. McHugh, AFIOH/RSRH (attn: Entomology), 2513 Kennedy Circle, Brooks City-Base, TX 78235. Monte L. Thies, Department of Biological Sciences, Box 2116, Sam Houston State University, Huntsville, TX 77341. Peter C. Melby, Department of Medicine, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229. Loudon D. Yantis, Jr., United States Army Veterinary Laboratory Europe, CMR 402, APO AE 09180. Russell W. Raymond, Maria D. Villegas, and Sara F. Kerr, School of Math, Science and Engineering, University of the Incarnate Word, 4301 Broadway, San Antonio, TX 78209.

Reprint requests: Chad P. McHugh, AFIOH/RSRH (Attn: Entomology), 2513 Kennedy Circle, Brooks City-Base, TX 78235-5116, Telephone: 210-536-6135, E-mail: chad.mchugh{at}brooks.af.mil.






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