[Study of Dermanyssus gallinae as a carrier of Pasteurella multocida]

Microbiologic studies and biologic experiments revealed that Pasteurella multocida persists in the body of Dermanyssus gallinae mites after these engorge with blood from infected birds. Depending on the temperature of the environment the carrier status was shown to last from 42 to 64 days. It is reported that the red mite acts as a vector and does not transmit Pasteurellae directly. However, the parasite is potentially hazardous in maintaining and passing on the infection through other indirect routes. Carrier status has been established in naturally infected Dermanyssus gallinae mites.