Blood Parameters of Laying Hens Infested with Dermanyssus gallinae


Ünbaş E., Yazgan N., Coşkun B. , Konyalı C. , Kamanlı S., Savaş T.

27th International Scientific-Expert Congress of Agriculture and Food Industry, Bursa, Turkey, 26 - 28 September 2016, pp.162

  • Publication Type: Conference Paper / Full Text
  • City: Bursa
  • Country: Turkey
  • Page Numbers: pp.162

Abstract

First damages of blood sucking parasites can be monitored from the hemotological parameters. Dermanyssus gallinae, widely known as the poultry red mite (PRM), is an ecto-parasite that feeds on blood. In this study we compared hematological values of chickens healthy and infested with PRM. A total of 48 white layer hens (60-week old) were used in the study. Hens were randomly divided in 2 groups as uninfested control hens and infested hens with PRM. Groups were housed in two identical rooms and each hen was kept in individual cages. Mites were collected from healthy backyard coops and hens were experimentally infested by using traps. . No significant differences were observed between groups on the beginning of the experiment. A heavy infestation was observed after 45 days, which caused high mortality. Anemia was clearly observed according to the hematological parameters of infested hens. Average erythrocyte numbers of infested and healthy chickens were 0.99∙x106 /mm3 and 2.21∙x106 /mm3 , respectively (P<0.0001). Infested birds had a hematocrit value of 19%, while the same value for healthy chickens was 28% (P<0.0001). The enormous difference on erythrocyte numbers between the groups was showed the damages potential of the studied parasite. The determination of lower tolerance limit of the infestation intensity is an open question.

Keywords: White Layers, Ectoparasite, Erythrocyte, Hematocrit