| molecular investigations of cytochrome c oxidase subunit i (coi) and the internal transcribed spacer (its) in the poultry red mite, dermanyssus gallinae, in northern europe and implications for its transmission between laying poultry farms. | samples of dermanyssus gallinae (degeer) (acari: dermanyssidae) from more than 49 norwegian and swedish laying poultry farms, and additional samples collected from scottish, finnish, danish and dutch layer farms, were compared genetically. analysis of partial mitochondrial gene cytochrome c oxidase subunit i (coi) sequences of mites from norway and sweden revealed 32 haplotypes. only single haplotypes were found on most farms, which suggests that infections are recycled within farms and that tra ... | 2011 | 21501200 |