Severe Ulceronecrotic Dermatitis Associated with Mite Infestation in the Critically Endangered Amargosa Vole (Microtus Californicus Scirpensis)

    August 2013 in “ Journal of Parasitology ”
    Janet E. Foley, Tammy Branston, Leslie W. Woods, Deana L. Clifford
    TLDR Mite infestations severely harm the health of endangered Amargosa voles.
    The study investigated mite infestation in the critically endangered Amargosa vole, revealing that 39.7% of 151 voles sampled had hard orange mites, primarily on their ears, genitalia, and near mammary tissue. The infestation led to severe pinnal lesions and deformities, including alopecia, swelling, necrosis, and ulceration, affecting 47% of the voles. Biopsies showed significant skin damage and inflammation, with mite mouthparts penetrating the epidermis. The mites were identified as a larval trombiculid, likely Neotrombicula microti. The severe trombiculiasis observed could adversely affect the health and fitness of this endangered species.
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