The new work, she said, points to insect bites as an additional route of transmission. When a stable fly bites a cow, it injects salivary proteins that help it access and digest blood. That ...

stable, and black flies. Bites vary by species and person, but they’re often raised, red bumps or welts. Some might even bleed. Blackfly bites also might swell. (Pictured here is a horse fly bite.) ...

Physical barriers and traps are an additional layer of defense. Fly masks are more commonly associated with horses, but they ...