In biological transmission, which term describes when the arthropod injects a pathogen directly into the host's bloodstream?

Optimize your Entomology 1 PMT exam preparation with our targeted study material. Engage with our flashcards and multiple choice questions, complete with hints and detailed explanations. Get exam-ready today!

Multiple Choice

In biological transmission, which term describes when the arthropod injects a pathogen directly into the host's bloodstream?

When a vector injects a pathogen into the host’s bloodstream during feeding, that action is called inoculation. In biological transmission, the pathogen is not merely carried on the vector’s body but is delivered through a bite or piercing by the arthropod’s mouthparts, often aided by saliva, directly into the host’s blood. This distinguishes it from regurgitation (where material is expelled from the gut), fecal contamination (pathogens arriving via feces on skin or wounds), or simple contamination (pathogens merely contacting surfaces without being injected). A familiar example is malaria, where the mosquito injects the parasite into the host’s bloodstream.

When a vector injects a pathogen into the host’s bloodstream during feeding, that action is called inoculation. In biological transmission, the pathogen is not merely carried on the vector’s body but is delivered through a bite or piercing by the arthropod’s mouthparts, often aided by saliva, directly into the host’s blood. This distinguishes it from regurgitation (where material is expelled from the gut), fecal contamination (pathogens arriving via feces on skin or wounds), or simple contamination (pathogens merely contacting surfaces without being injected). A familiar example is malaria, where the mosquito injects the parasite into the host’s bloodstream.

More practice questions