猪血虱 （Haematopinus suis） 主讲 米政实 组员 申翰钦 王德刚 高李泽 08级动物科学类丁颍班 2017/4/22

Haematopinus suis Belongs to the suborder Anoplura(虱目) The swine louse is the largest louse affecting domestic animals（家畜） and is of common occurrence wherever the hog is found. The pig is its only host, and when not molested the parasite is likely to increase in large numbers and cause an unthrifty condition in a herd. 2017/4/22

1 形态学（Morphology） Antenna 触角 Haematopinus has a long narrow head, long mouthparts adapted for sucking blood, and large claws each on its six legs. The wide body is grayish-brown with black edges. This is the only louse of swine. Legs 足 Claw 抓 2017/4/22

2 生活史（Life cycle） Nymph Egg Adult Each Haematopinus suis female produces up to 90 eggs over 25 to 30 days. Each egg is about 1-2 mm long and is attached by clear cement to the hair. About 12 days Nymph （若虫） Egg (3 to 6 eggs per day) Hatch in 1 to 2 weeks 2017/4/22

3 流行病学(Epidemiology) Epidemiology is uncomplicated Contact infection Host-specific(宿主专一性) Cannot live for more than 2-3 days away from the host. 2017/4/22

4 Pathogenesis and Symptoms（致病作用和症状） The lice live frequently in the folds of skin on neck and jowl, the inside and base of ears ,the inside of legs, the flanks , and the back in smaller numbers, where they crawl under the scales to get in contact with the new skin. 2017/4/22

4 Pathogenesis and Symptoms （致病作用和症状） Results in anemia(贫血) in young pigs; Affects growth rate and efficiency of food conversion; Vector of swine pox(猪痘) 2017/4/22

5 Diagnosis (诊断) Scratching(抓痕) and Rubbing(摩擦) Adult lice on the body Nymph attached to the lower parts of hairs 2017/4/22

6 Treatment ( 治疗) Therapeutic agents may be applied to the pig in the form of sprays(喷雾),pour-ons and dusting powders. Organochloride 有机氯杀虫剂 Organophosphorus 有机磷杀虫剂 2017/4/22

7 control special attention to the ears treatment of the boars(公猪) multiple treatment of sows prior to farrowing treatment of the whole herd 2017/4/22

参考文献 兽医寄生虫学（Veterinary Parasitology） 李国清 主编 中国农业出版社.2006 Diseases of Swine (9th Edition)