An anorexic 5-yr-old female giant anteater () developed multifocal ulcerative and vesicular lesions affecting the rostrum, oral cavity, and tongue. Disseminated skin lesions were also found on the body, affecting the feet, flanks, and genital area. Polymerase chain reaction confirmed a systemic viremic orthopoxvirus infection. Cowpox virus was considered to be the only likely etiological agent. Intensive supportive treatment, including daily fluid therapy, force-feeding, and anti-inflammatory administration achieved a successful outcome after 3 wk. To the authors' knowledge, this is the first time a giant anteater with severe orthopoxvirus lesions has survived the disease. This unique case discusses current and possible future therapeutic and prophylactic options for the treatment of orthopoxvirus infections in giant anteaters and other nondomestic animal species.
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