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1.
猪等孢球虫是一种能引起仔猪球虫病的专性寄生性原虫,可引起仔猪严重腹泻甚至死亡,其发病率可高达50%~75%,病死率高达75%,呈世界性流行,严重危害养猪业发展。目前对仔猪球虫病的防控主要以药物预防为主,随着耐药虫株的不断产生及公众对药物残留的高度关注,使得这一防控手段面临巨大挑战,新型抗猪球虫药物、疫苗及其他防控手段亟待研究开发。论文对猪等孢球虫的生活史、基因组学、免疫学及其与其他微生物的互作关系等方面进行综述,以期为仔猪球虫病的综合防控提供参考。 相似文献
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《养殖与饲料．饲料世界》2017,(12)
猪球虫病是一种由等孢属球虫和艾美耳属引起的仔猪消化道腹泻的寄生虫疾病,多发生于仔猪,可引起10~20日龄仔猪回肠变厚乃至出血的肠道疾病,带虫小猪成年后多变成带虫猪,排出粪便感染小猪,成为主要传染源,不同猪场均有该病发生。猪球虫类型繁杂,猪等孢球虫对仔猪的危害最大、致病力最强。 相似文献
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2002年杨光友等抽样调查了四川省12个市、县16个猪场的球虫病流行情况。采集1～50日龄仔猪粪样422份,用盐-糖漂浮法检查球虫卵囊,并进行培养和虫种鉴定。结果,仔猪球虫阳性场占93.75%(15/16),仔猪球虫总感染率为25.36%(107/422);猪等孢球虫阳性场占87.50%(14/16),猪等孢球虫总感染率为18.72%(79/422)。寄生于猪的球虫中以等孢球虫(Isosporasuis)对仔猪的致病力最强。20世纪70年代末,美国成立了仔猪腹泻球虫病协会,发现20%以上的仔猪腹泻是由猪等孢球虫引起的。美国、加拿大、比利时等一些国家,已先后把猪等孢球虫作为引起7～14日龄仔猪腹泻… 相似文献
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仔猪球虫病是由艾美尔球虫和等孢球虫寄生于哺乳期及刚断奶猪肠上皮细胞内的原虫病。本病各季节都可发生,球虫病虽然不会使大批仔猪死亡,但常有很高的发病率,并伴随其他继发性疾病,会对仔猪造成更大的危害。 相似文献
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一起仔猪球虫病的诊治 总被引：1，自引：0，他引：1
《云南畜牧兽医》2017,(2)
仔猪球虫病是由猪等孢球虫和某些艾美耳属球虫寄生在仔猪小肠上皮细胞所引起的一种寄生性原虫病。介绍泸西县一起仔猪球虫病的发病情况、临床症状、病理剖检、实验室检查、治疗。有效地防控了仔猪球虫病,为广大养殖户提供了参考。 相似文献
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仔猪球虫病是由等孢属和艾美耳属的球虫所引起的以腹泻为特征的原虫病,规模化的猪场与散养的猪场均有该病的发生。该病的病原为猪等孢球虫,各种猪均可感染该病,但？？日龄以内仔猪最易感,成年猪多为带虫者,是本病的传染源。该病的主要特征是腹泻、排淡黄色粪便、消瘦和生长发育受阻等降低,该病是危害养猪业的疾病之一。因此,预防和控制该病具有重要意义。 相似文献
9.
猪球虫病是由艾美耳属和等孢属球虫引起的仔猪消化道疾病。病猪腹泻、消瘦及发育受阻，成年猪多为带虫者。猪球虫病多见于仔猪，可引起严重的消化道疾病。成年猪多为带虫者，是本病的传染源。该病呈世界性分布，猪球虫的种类很多，但对仔猪致病力最强的是猪等孢球虫。 相似文献
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仔猪等孢球虫与等孢球虫病研究进展 总被引：2，自引：0，他引：2
仔猪等孢球虫病是由猪等孢球虫寄生在哺乳期及新近断奶仔猪小肠上皮细胞所引起的一种寄生性原虫病，呈世界性分布，给养猪场造成严重的经济损失。本文对猪等孢球虫病的病原分类、虫体形态和生活史、致病性、流行病学特点、临床症状、病理变化、诊断、防治等方面的目前研究状况进行了综述，为猪等孢球虫病的有效防制提供参考。 相似文献
12.
Prevalence of oocysts of Isospora suis and Eimeria spp from sows on farms with and without a history of neonatal coccidiosis 总被引：2，自引：0，他引：2
D S Lindsay J V Ernst W L Current B P Stuart T B Stewart 《Journal of the American Veterinary Medical Association》1984,185(4):419-421
Oocysts of Isospora suis were not found in any of 77 fecal samples from sows on farms with a history of neonatal coccidiosis. Oocysts of Isospora suis were found in 1 of 172 fecal samples from farms without a history of neonatal coccidiosis. Oocysts of Eimeria spp were found in 81.8% of the sows from farms with a history of neonatal coccidiosis and in 94.8% of the sows from farms without a history of neonatal coccidiosis. Oocysts of Isospora spp from birds were encountered as a pseudoparasite in several fecal samples. 相似文献
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At present neonatal coccidiosis caused by Isospora suis is known to be an important disease in piglets. The coccidium I. suis was diagnosed as the causative agent of diarrhoeic disease in piglets on a large pig farm with continuous farrowing operation. The diagnosis of coccidiosis was based on clinical history, gross lesions, histopathology, stained impression smears and aided by detection of oocysts in the faeces. Coccidiosis was associated with diarrhoea in piglets at the age of five to fourteen days. The disease was characterized by variable morbidity and only a portion of the litters was usually affected at one time. The piglets appeared listless, and suffered from yellow watery scours progressing to yellow pasty scours over a three- to five-day period. The lack of response to common antimicrobial therapy, and/or vaccination of sows for E. coli was observed. The prophylactic and therapeutic efficacy of tortrazuril (Baycox, Bayer) against coccidiosis was evaluated in naturally infected piglets. Tortrazuril at a dose of 20 mg/kg, given perorally to each piglet on days 6 and 8 of age, proved to be efficacious in preventing clinical coccidiosis in piglets. Tortrazuril fully controlled the oocyst output, prevented the development of diarrhoea but not improved the weight gains in three-week-old piglets if compared to the untreated controls. The prophylactic and therapeutic efficacy of tortrazuril was compared with another drug--amprolium (Amprovin, MSD). Amprolium at a dose of 100 mg/kg, given perorally to piglets from day 6 to 8 of age, was not efficacious in preventing clinical porcine neonatal coccidiosis. Amprolium reduced the oocyst output, but not prevented the development of diarrhoea. Tortrazuril (Baycox, Bayer) is clearly effective against porcine neonatal coccidiosis caused by I. suis. 相似文献
14.
Thirty-two piglets from three litters were experimentally inoculated with 200000 sporulated oocysts of Isospora suis at 3 days of age and/or rechallenged at 19 days of age or primary inoculated at 19 days of age, to compare the role of acquired immunity and natural age resistance on the course of coccidiosis. Twelve piglets were not inoculated and served as a control. Following challenge, the signs of coccidiosis characterised by clinical symptoms, oocysts shedding and weekly weights were similar to those which occurred in piglets primary inoculated at 19 days of age. This comparison suggests that maturation of non-specific components of the immune system plays a more important role in the resistance of neonatal piglets to I. suis infection than specific immune mechanisms. 相似文献
15.
SUMMARY: To determine the efficacy of toltrazuril as a prophylactic treatment for coccidiosis in piglets caused by Isospora suis (I suis) , a single 1.0 mL dose of toltrazuril was administered orally to 1056 piglets between 3 and 6 days of age, in 5 piggeries. Prophylactic treatment of piglets reduced the occurrence of coccidiosis in litters from 71% to 22%. The number of antibacterial treatments given and the number of piglets affected per litter were also significantly reduced, resulting in some improvement in growth rates to weaning. The severity of diarrhoea was significantly reduced, as was the amount of oocyst excretion. The number of days that piglets excreted oocysts in the faeces was reduced from 4.9 days to 2.5 days. The detection of J suis in piglets with diarrhoea was reduced from 84% in the untreated piglets to 6% in the piglets given the prophylactic treatment. 相似文献
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Experimental Isospora suis infections in miniature swine 总被引：2，自引：0，他引：2
Clinical responses to experimental Isospora suis infections were compared in Sinclair miniature pigs and cross-bred conventional pigs. Pre-patent periods, fecal consistencies, oocyst excretion dynamics, trends in surviving pig weights and lesions were similar in infected miniature and conventional pigs. The results indicate that the susceptibility of miniature pigs to I. suis is similar to that of conventional pigs. These findings should encourage their use as models for the study of neonatal coccidiosis. 相似文献
17.
重庆市猪球虫病流行病学调查与虫种鉴定 总被引：1，自引：0，他引：1
目的为了解重庆市猪场球虫感染情况。方法选取重庆市9个县14个猎场作为采样点,对被检猪采用直肠取粪法或采集猪刚排出的新鲜粪便,饱和食盐水漂浮法收集卵囊,镜检观察。对收集到的卵囊进行培养,待其孢子化后进行种类鉴定。结果14个猪场均感染了球虫,球虫的平均感染率为33.83%,阳性率最高的场为76.09%;仔猪感染率为41.87%,后备猪感染率为26.33%,种猪感染率为67.80%。发现8种艾美耳属球虫和1种等孢属球虫,分别是猪艾美耳球虫(检出率13.56%),豚艾美耳球虫(检出率41.59%),有刺艾美耳球虫(检出率12.84%),平滑艾美耳球虫(检出率4.70%),新蒂氏艾美耳球虫(检出率10.49%),蒂氏艾美耳球虫(检出率11.03%),粗糙艾美耳球虫(检出率2.35%),极细艾美耳球虫(检出率3.07%),及猪等孢球虫(检出率0.36%)。结论重庆市猪球虫感染率较高,应加强猪球虫病的防制。 相似文献
18.
Effects of experimentally induced Isospora suis infection on morbidity, mortality, and weight gains in nursing pigs 总被引：1，自引：0，他引：1
Forty-nine pigs from 6 litters were inoculated at 3 days of age with 300,000 sporulated oocysts of Isospora suis to determine the effects of neonatal coccidiosis on morbidity, mortality, and weight gain in nursing pigs. Fifty-one control pigs from 6 litters were not inoculated. Three to 5 days after inoculation, the inoculated pigs developed a nonhemorrhagic diarrhea, generally lasting 6 to 10 days, that lead to visible dehydration, loss of condition, and 20.4% mortality. Control pigs did not die or develop coccidiosis during the 3-week study and had significantly (P less than 0.05) greater body weights at 7, 14, and 21 days of age than did the inoculated pigs. 相似文献
19.
Control of Isospora suis-induced coccidiosis on a swine farm 总被引：6，自引：0，他引：6
Results of a program designed to control neonatal porcine coccidiosis on a total confinement, farrow-to-finish swine farm are reported. The control program consisted of washing, phenol disinfection, and steam cleaning of farrowing houses and treatment of sows with amprolium HCl before and after farrowing. Before initiation of the control program, 88.9% of the sows examined in the farrowing house were negative for coccidian oocysts, 9.9% were positive for Eimeria spp, and 1.2% were positive for Isospora suis. Most pigs nursing on sows before initiation of the control program had diarrhea at 5 to 10 days of age, which led to dehydration and weight loss. Morbidity was high, and mortality was moderate. Composite fecal samples from these litters were all positive (100%) for I suis. After initiation of the control program, 99.6% of the sows examined in the farrowing house were negative for coccidian oocysts and 0.4% were positive for Eimeria spp. Clinical signs of coccidiosis were rarely present in nursing pigs examined after the control program was initiated; however, I suis was still present in 19.8% of the composite fecal samples from pigs examined. An association between oocyst production in sows and I suis infections in pigs was not found in the present study. Oocysts of Eimeria spp were not found in the feces from the pigs. 相似文献
20.
B P Stuart H S Gosser C B Allen D M Bedell 《Canadian journal of veterinary research》1982,46(3):317-320
Coccidiosis is a disease of the young piglet due to infection with Isospora suis and is characterized by diarrhea which is nonresponsive to antibacterial therapy. There is variable morbidity and mortality. Piglets develop a more severe clinical illness and enteritis when infected with I. suis at one to three days of age than when infected at two weeks of age. Microscopic lesions range from villous atrophy and mild erosion to severe fibrinonecrotic enteritis. 相似文献