Mohamed Douifi, Nassim Ouchene, Karim Rahal, Ahcène akem


Dermanyssus gallinae (Red mite) is the most important and common ectoparasite of laying hens and recognized as a vector of several pathogens. In order to estimate the infestation prevalence rate of Dermanyssus gallinae in layer housing and to evaluate its vectorial role in regard to salmonella. A study was carried out in 386 laying hen farms in four provinces located in north-eastern Algeria. A total of 32 pooled mite samples were examined for the presence of Salmonella enterica, Salmonella typhimurium and Salmonella enteritidis using PCR essay. Results showed that 14% of hen housing were infested by D. gallinae. Salmonella enterica DNA was detected in 8 samples (25%), including two Salmonella enteritidis (6.25%). These results indicate that D. gallinae can act as reservoir of Salmonella, allowing the propagation of this bacterium between successive bands and between different farms.


Dermanyssus Gallinae, Salmonella, Layer Housing, Vector, Algeria

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