Studies on the epizootiology of canine cestodes, particularly Taenia multiceps and ovine coenurosis
Studies on the epizootiology of canine cestodes, particularly Taenia multiceps and ovine coenurosis
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犬绦虫，特别是多头带绦虫和绵羊多头绦虫病的流行病学研究
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发表时间：
1992
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影响因子：
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通讯作者：
B. M. Williams
中科院分区：
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作者：
B. M. Williams
在1973年对威尔士戴费德的552个羊群进行的一项调查中，375个（68%）羊群发生多头蚴病，估计年平均发病率在2.5%和3.0%之间。在58/1000（5.8%）被送去屠宰的羔羊中发现了多头带绦虫幼虫阶段感染的证据。从20/100个绵羊繁殖场的37/320（11.5%）只犬、2/18个绵羊越冬场的3/39（7.7%）只犬和4/12包的41/552（7.4%）只猎犬中回收多头带绦虫。农场狗只和猎犬感染绦虫的频率与喂食生肉和内脏以及缺乏定期驱虫治疗密切相关。166只宠物犬中仅1只（0.6%）和387只狐狸中仅1只（0.26%）携带多头带绦虫，两者均不被认为是多头带绦虫流行病学的重要组成部分。
狗实验感染多头带绦虫，并保持感染长达六个月或更长的时间，每天脱落多达21个节片。兔和小鼠不能实验性感染多头带绦虫六钩蚴，但实验性感染的羔羊发生急性或慢性多头蚴病。
六钩蚴在蒸馏水中的悬浮液在3 - 11°C下可以存活长达8周，但多头蚴在9 - 11°C下在完整头骨中的存活时间不超过4天。
急性和慢性多头蚴病的发病机制，特别是参考的临床症状，临床病理学，病理学和免疫学，在实验感染的羔羊和选定的领域的情况下的疾病进行了研究。
In a survey of 552 sheep flocks in Dyfed, Wales, carried out in 1973, coenurosis occurred in 375 (68%) with an estimated average annual flock incidence of between 2.5 and 3.0%. Evidence of infection with the larval stage of Taenia multiceps was found in 58/1000 (5.8%) lambs sent for slaughter. Taenia multiceps was recovered from 37/320 (11.5%) dogs on 20/100 sheep breeding farms, 3/39 (7.7%) dogs on 2/18 sheep wintering farms and 41/552 (7.4%) hounds in 4/12 packs. The frequency of cestode infection in farm dogs and hounds was closely associated with the feeding of uncooked meat and offal and the absence of regular anthelmintic treatment. Only one (0.6%) of 166 pet dogs and one (0.26%) of 387 foxes examined harboured Taenia multiceps and neither were considered to be of importance in the epizootiology of Taenia multiceps.
Dogs were experimentally infected with Taenia multiceps and remained infected for up to periods of six months or longer, and up to 21 proglottids were shed each day. Rabbits and mice could not be experimentally infected with oncospheres of Taenia multiceps, but lambs which were experimentally infected with the oncospheres developed acute or chronic coenurosis.
Suspensions of oncospheres in distilled water remained viable at 3 - 11°C for periods up to eight weeks, but the coenurus was viable for no longer than four days in the intact skull at 9 - 11°C.
The pathogenesis of acute and chronic coenurosis, with particular reference to the clinical signs, clinical pathology, pathology and immunology, was studied in experimentally infected lambs and selected field cases of the disease.