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Chrysomya bezziana (Diptera: Calliphoridae) infestation: case report of three dogs in Malaysia treated with spinosad/milbemycin
Author(s) -
Han Hock Siew,
Sharma Reuben,
Jeffery John,
Noli Chiara
Publication year - 2017
Publication title -
veterinary dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.744
H-Index - 60
eISSN - 1365-3164
pISSN - 0959-4493
DOI - 10.1111/vde.12403
Subject(s) - calliphoridae , spinosad , infestation , veterinary medicine , biology , myiasis , toxicology , medicine , horticulture , ecology , larva , pesticide
Background Infestation of wounds with the larvae of Callophorid flies is relatively common in countries where these parasites are found. The most common species associated with infections in Southeast Asia is Chrysomya bezziana ( Ch. bezziana ), the Old World screw worm. Treatment consists of either subcutaneous injection of ivermectin or oral administration of nitenpyram combined with aggressive tissue debridement under general anaesthesia. Objectives To describe the treatment of cutaneous myiasis in three dogs caused by the larvae of Ch. bezzian a in Malaysia and their treatment with spinosad plus milbemycin. Results In all dogs, a single oral dose of spinosad plus milbemycin at the recommended dosage of 31–62 mg/kg and 0.5–1.0 mg/kg, respectively, was able to kill all larvae within 8 h. Most dead larvae fell off the host and those remaining on the host were dead and easily removed with simple saline flushing and gentle debridement. Neither general anaesthesia nor aggressive mechanical debridement were needed in any patient. Conclusions and clinical importance Oral spinosad plus milbemycin is a safe, licensed and effective treatment at the recommended dose for the rapid elimination of Ch. bezziana myiasis, with no need for sedation or anaesthesia.