Diseases of poultry; their etiology, Diseases of poultry; their etiology, diagnosis, treatment, and prevention diseasesofpoultr00pea Year: 1915 206 Diseases of Puidtry A. LICE (MALLOPHAGA) Lice are probably the most widely distributed parasite of poultry. They are so common that flocks of fowls that have not been treated to remove lice for a long time are almost ' sure to have one or more species present. At least 8 species of hen lice have been found and 5 of these are common. Bird lice are quite different from those which affect man and mammals. The popular notion that lice may be transmit
Diseases of poultry; their etiology, Diseases of poultry; their etiology, diagnosis, treatment, and prevention diseasesofpoultr00pea Year: 1915 206 Diseases of Puidtry A. LICE (MALLOPHAGA) Lice are probably the most widely distributed parasite of poultry. They are so common that flocks of fowls that have not been treated to remove lice for a long time are almost ' sure to have one or more species present. At least 8 species of hen lice have been found and 5 of these are common. Bird lice are quite different from those which affect man and mammals. The popular notion that lice may be transmitted from poultry to other animals is quite erroneous. Theobald says: ' So particular are bird-lice that it is quite the exception to find one species upon two distinct kinds of birds. Fowl-lice will not even at- tack the duck nor duck-lice the fowl. Nearly'every bird has its own partic- ular Mallophagan parasite or para- sites. They may possibly pass to some strange host for a short time, but they will not live and breed. IMoreover, . . . particular species at- tack restricted areas on the same host and are seldom found in other positions.' Some of these lice are sluggish, nearly stationary, and confined to a restricted area of the body, while others are active and crawl over the en- tire body. Theobald describes eight species of lice found on poultry. The most common and widely distributed hen louse found in this country is Menopon ixiUidum. This louse is shown in Fig. 36. Another species of this genus {Menopon hiseriahim), which Fig. 3G. — The common hen louse {Menopon pal- lidum). Greatly enlarged. (From Banks.)
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