Veterinary Parasitology: The Practical Veterinarian - CX.com

• Adult females lay eggs near entrances to burrows or
along rabbit runs.
• Larvae hatch in response to presence of animal,
crawl into fur, and enter subcutaneous tissues of host
through natural body openings.
• Cut breathing holes and develop to large (up to 3
cm), black third-stage larvae in subcutaneous cysts.
• In dogs and cats, generally found in neck and head
region in late summer and early fall; also found in
aberrant sites including anterior chamber of the eye
and the brain.
• Generally benign unless secondary bacterial infection
of cyst occurs or larvae migrate to aberrant sites.
• Diagnosis is based on finding characteristic cysts with
breathing holes in which second- or third-stage larvae
are usually present.
Facultative Myiasis-Producing Flies
Arthropods 41
GENERA OR SPECIES INVOLVED
• Lucilia (green or copper bottle flies)
• Phoenicia (green bottle flies)
• Phormia (black blow flies)
• Calliphora (blue bottle flies)
• Sarcophaga (flesh flies)
• Cochliomyia macellaria (secondary screwworm)