Porcine Insect Bites Study Guide
Overview and Clinical Importance
Insect bites represent a significant cause of skin lesions, economic loss, and disease transmission in swine production. Biting insects including stable flies (Stomoxys calcitrans), mosquitoes (Culex, Aedes species), hog lice (Haematopinus suis), and biting midges (Culicoides species) cause direct damage through blood feeding and serve as mechanical or biological vectors for numerous swine pathogens.
Understanding insect-related dermatoses in pigs is essential for NAVLE because these conditions affect animal welfare, production efficiency, and can serve as entry points for secondary infections. Additionally, certain mosquito-borne diseases like Japanese Encephalitis Virus (JEV) have significant zoonotic implications.
Major Biting Insects Affecting Swine
Stable Flies (Stomoxys calcitrans)
Biology and Life Cycle
Stable flies are blood-feeding Dipterans that closely resemble house flies but can be distinguished by their bayonet-like proboscis used for piercing skin. Both males and females are blood feeders, requiring 1-2 blood meals daily. The complete life cycle takes approximately 15-30 days depending on environmental conditions.
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