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Trombiculiasis in the Florida black bear.
M W Cunningham1, L A Phillips, C Wellbourn
1Department of Pathobiology, College of Veterinary Medicine, University of Florida, Gainesville 32611, USA. cunninm@fwc.state.fl.us
Journal of Wildlife Diseases
|August 16, 2001
Summary
Trombiculid mite infestations were found in 32% of Florida black bears studied. These chigger infestations peaked in June, affecting bear abdomens and limbs.
Area of Science:
- Zoology
- Parasitology
- Wildlife Health
Background:
- Trombiculid mites, commonly known as chiggers, can parasitize various wildlife species.
- Understanding ectoparasite prevalence is crucial for assessing wildlife health and potential disease transmission.
Purpose of the Study:
- To investigate the prevalence and characteristics of trombiculid mite infestations in free-ranging Florida black bears.
- To identify the specific mite species and their distribution on the host.
Main Methods:
- Examined live-captured and necropsied Florida black bears (Ursus americanus floridanus) from January 1999 to April 2000.
- Recorded mite presence, density, location on the host, and associated cutaneous lesions.
- Identified mites to the species level.
Main Results:
- Trombiculid mite infestations were detected in 32% (32 of 101) of Florida black bears.
- Infestations were most prevalent in June, with none observed from October to March.
- Larval Eutrombicula splendens were identified, typically found in clusters on the ventral abdomen, thorax, and extremities.
- Cutaneous lesions were observed in 6% of infested bears.
Conclusions:
- Florida black bears are susceptible to trombiculid mite infestations, particularly Eutrombicula splendens.
- Seasonal patterns in chigger prevalence were observed, with a summer peak.
- While generally low, cutaneous lesions indicate potential health impacts of these infestations in black bears.