Editing Chicken (section)

== Diseases ==

{{main |Poultry disease}}

[[File:Pesse oujheas H9N2 tanfla.JPG|thumb|8 day old chick with [[avian influenza]] ]]

Chickens are susceptible both to [[Parasitism|parasite]]s such as [[mite]]s, and to [[Poultry disease|diseases]] caused by [[pathogen]]s such as [[bacteria]] and [[virus]]es. The parasite ''[[Dermanyssus gallinae]]'' feeds on blood, causing irritation and reducing egg production, and acts as a vector for bacterial diseases such as [[salmonellosis]] and [[Borrelia anserina|spirochaetosis]].<ref name="Schiavone Pugliese 2022">{{Cite journal |last1=Schiavone |first1=Antonella |last2=Pugliese |first2=Nicola |last3=Otranto |first3=Domenico |last4=Samarelli |first4=Rossella |last5=Circella |first5=Elena |last6=De Virgilio |first6=Caterina |last7=Camarda |first7=Antonio |date=January 20, 2022 |title=''Dermanyssus gallinae'': the long journey of the poultry red mite to become a vector |journal=Parasites & Vectors |volume=15 |issue=1 |pages=29 |doi=10.1186/s13071-021-05142-1 |pmid=35057849 |issn=1756-3305 |pmc=8772161 |doi-access=free }}</ref>
Viral diseases include [[avian influenza]].<ref>{{cite journal |last1=Barjesteh |first1=Neda |last2=O'Dowd |first2=Kelsey |last3=Vahedi |first3=Seyed Milad |title=Antiviral responses against chicken respiratory infections: Focus on avian influenza virus and infectious bronchitis virus |journal=Cytokine |date=March 2020 |volume=127 |pages=154961 |doi=10.1016/j.cyto.2019.154961 |pmid=31901597|pmc=7129915 }}</ref>