一、發病情況：該養殖戶飼養的是美系白色獺兔，9月20日發現有8只體重約3.5公斤的母兔發病，22日發病母兔增加到18只，發病率為種母兔飼養量的38%,23日已有3只死亡，死亡率為16%.

First, the incidence of the farmers rearing is the United States Department of White Rex, September 20th found that the incidence of 8 female rabbits only about 3.5 kg in weight, 22 day incidence of female rabbits increased to 18, the incidence rate of female rabbit rearing volume of 38%, 23, 3 rats died, the mortality was 16%.

二、臨床癥狀。病兔精神沉郁，食欲減少或廢絕，排出小而堅硬糞便，個別不排糞。

Two. Clinical symptoms. The rabbits in the depression, loss of appetite or waste, discharge of small hard stool, defecation is not individual.

三、長毛兔剖檢變化。剖檢3只病死兔，腸粘膜有不同程度出血，腸系膜淋巴結腫脹，回腸和盲腸粘膜以及回盲瓣也有不同程度腫脹，其他器官無明顯變化。

Three. Changes of necropsy in Angora rabbits. 3 rabbits died of intestinal bleeding, mesenteric lymph nodes swelling, ileum and cecum mucosa and ileocecal valve swelling in varying degrees, and other organs did not change significantly.

四、診斷。據實驗室涂片鏡檢，細菌學檢查結果，結合臨床表現及剖檢變化，確診為兔大腸桿菌感染。藥敏試驗結果為：對慶大霉素、氯霉素、氟哌酸高敏，對卡那霉素、痢特靈、鏈霉素中敏，對四環素、青霉素、磺胺嘧啶不敏感。

Four 、 diagnosis. According to the laboratory smear microscopy, bacteriological examination results, combined with clinical manifestations and necropsy changes, diagnosed as Escherichia coli infection in rabbits. The results of drug sensitivity test of gentamicin, chloramphenicol and norfloxacin on Gao Min, kanamycin, furazolidone, streptomycin sensitive, not sensitive to tetracycline, penicillin and sulfadiazine.

五、防治措施。將病兔隔離飼養，死兔深埋，對兔舍進行徹底清掃。火堿、百毒殺交替。另外加強通風，保持兔籠干燥。用人工鹽5-6克，病情嚴重者用蓖麻油10-15毫升，加溫水人工灌服，同時肌注慶大霉素2萬單位/公斤體重，每天2次。飼料中加入氟哌酸，連用4-6天。兔群穩定后，全群接種大腸桿菌滅活疫苗2毫升/只。

Five, prevention and control measures. The rabbits were isolated and reared, the dead rabbits were deeply buried, and the rabbit house was thoroughly cleaned. Caustic soda, disinfection Baidusha alternately. In addition to strengthen the ventilation, keep dry hutch. Artificial salt 5-6 grams, severe cases with castor oil 10-15 ml, with warm water artificial irrigation, while intramuscular injection gentamicin 20 thousand units / kg body weight, 2 times a day. Add norfloxacin feed in 4-6 days. After the rabbit colony stabilized, the whole population was inoculated with inactivated Escherichia coli vaccine 2 ml / ml..

很多養殖戶在發現成年兔排出糞便小而堅硬時,只考慮是由于喂精料過多,青飼料不足,缺水等原因引起的便秘,而忽視了大腸桿菌,所以筆者敬告廣大養殖戶,在長毛兔發生便秘時,應借助科學診斷方法,作出正確診斷,以防誤診,造成更大的經濟損失,

Many farmers found in adult rabbit feces are small and hard, only consider is due to feed too much, forage shortage, caused by shortages of constipation, neglect of Escherichia coli, so the author cautioned the majority of farmers in Angora rabbit constipation, should rely on science to make the correct diagnosis method. The diagnosis, to prevent misdiagnosis, resulting in greater economic losses,

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