马浑睛虫病的中西医治疗

浑睛虫病又称混睛虫病,为马丝状线虫和指形丝状线虫的幼虫寄生在马眼房液中所引起的一种寄生虫病。虫体长1-5cm。这两种线虫的正常宿主是黄牛和水牛,成虫多寄生在牛的腹腔、胸腔等处,牛、马混养通过蚊蝇叮咬互相传播。幼虫一旦随血液侵入眼前房内,     

黑龙江省首次发现绵羊丝状网尾线虫

在双城市蠕虫学剖检２只绵羊时，于１只绵羊肺小支气管内发现３条线虫，透明后镜下观察并测量其大小，根据其形态学特征，鉴定为雌性丝状网尾线虫，为黑龙江省首见虫种。     

1例马浑睛虫病的诊治

马浑睛虫病是由多种丝状线虫童虫寄生于马眼前房内引起的一种寄生虫病,临床上以患眼羞明流泪、角膜混浊、视力下降甚至失明为特征。笔者偶遇1例,经手术治疗痊愈,现将诊治过程报道如下。     

混睛虫病的防治

混睛虫病是由丝状科丝状属丝状线虫的微丝蚴寄生于眼前房,引起角膜及眼前房混浊的疾病。童虫迷路侵入马羊的脑、脊髓的硬膜下或实质中,引起运动神精障碍,共济失调等症状。丝状线虫的成虫寄生于马羊的腹腔,在腹腔内繁殖的微丝蚴进入宿主的血液循环,经蚊吸血传播,成为马牛混睛虫病及     

奶牛胎盘感染马氏丝状线虫报告

大庆市三环企业总公司奶牛场自1989年至1992年冬春(12月～4月)季节共剖检新生犊牛37头,其中8头检出马氏丝状线虫(Seterie marshalli)占21.62％,除1头在心包液中检出4条外,其余虫体全在腹腔中检获。感染强度1～6条,平均为2.75条。系黑龙江省首次报道。 1 虫体形态描述 虫体呈白色线状,头端的齿状突起发达且突出,雌虫尾部粗,尾端呈半球状,并有数个分枝的结节。测量马氏丝状线虫的数据:雄虫虫体长5.50m、宽0.445cm、神经环至头端330um、肚门至尾端196μm、圆锥突至尾端32μm。雌虫虫体长     

鸟类也是指形丝状线虫的终宿主

指形丝状线虫的成虫致病性不强,但其幼虫可寄生于非固有宿主的某些器官,引起如脑脊髓丝虫病和浑睛虫病等一些危害较严重的疾病,给畜牧业造成一定损失。以往曾有资料报道指形丝状线虫寄     

羊脑脊髓丝虫病的防治

羊脑脊髓丝虫病是由寄生于牛腹腔的指形丝状线虫和唇乳突丝状线虫的幼虫迷路移行后,童虫寄生于幼羊的脑脊髓,而引起的以脑脊髓炎和脑脊髓实质破坏为特征的寄生虫病。1流行情况羊脑脊髓丝虫病有明显的季节性,多发生于夏末秋初,一般为7~10月份,其发病率随气温的升高及雨季的来临逐渐升高[1]。羊脑脊髓丝虫病在师宗县呈区域性零星散发,海拔在1 200 m以上的丹凤、雄壁、葵山等6个乡(镇)发病较少,在海拔低于1 200 m的高良、五龙2个乡(镇)发病较多,随海拔升高,发病数量逐步下降。自1999年以来,师宗县的羊因感染脑脊髓丝虫病而发病4 520只,死亡2 17…     

新疆乌鲁木齐地区绵羊丝状网尾线虫的流行病学研究

绵羊丝状网尾线虫(Dictyocaulus filaria)即肺丝虫是引起绵羊肺线虫病的主要病原,我国主要分布在西北地区,新疆是高发区,对畜牧业经济的发展有着重大的影响。2004年4月至2005年4月,对新疆乌鲁木齐地区的绵羊丝状网尾线虫流行病学做了较为详细的研究。通过12个月连续调查发现,在检查的643只绵羊中丝状网尾线虫的感染率为37.38%,感染强度(每10g粪便)为1～300条,较1975年～1988年新疆统计的丝状网尾线虫的感染率和感染强度均有所下降。此次调查发现,从12月份至来年的3月份绵羊丝状网尾线虫的感染率和感染强度均比较高。对此以及一些相关的问题进行了讨论分析并提出了有效的防治措施。     

鹿丝状肺虫病的防治

<正>鹿的丝状肺虫病是由于网尾科(Dictyocaulidae)网尾属(Dictyocaulus)的丝状网尾线虫[Dityocaulus filaria(Rudolphi,1890)]寄生于鹿的气管及支气管内,引起的以支气管炎和肺炎为主要特征的一种寄生虫病。本病在吉林省东辽河与西辽河流域养鹿场(户)的梅花鹿群中,多有流行。     

3种马肠道寄生线虫体表结构的扫描电镜观察

为了观察3种马肠道寄生线虫的体表结构，试验对采自马消化道内的偏位杯冠线虫(Cylicostephanus asymetricus)、间生杯冠线虫(Cylicostephanus hybridus)和粗壮食道齿线虫(Oesophagodontus robustus)标本(每种线虫选取雄虫、雌虫各3条)进行处理，然后用扫描电镜观察并测量。结果表明：偏位杯冠线虫外叶冠细长而卷曲，共20枚；雄虫生殖锥腹唇呈圆锥形，有乳突状突起，背唇上有成对、长囊状附属物；雌虫尾长为102μm。间生杯冠线虫外叶冠长而尖，共18枚；雄虫生殖锥腹唇皮质领发达，背唇上有1对乳突状突起的附属物；雌虫尾长为90μm。粗壮食道齿线虫外叶冠细长，共22枚；雄虫交合伞有伞前乳突，生殖锥有2对粗指状附属物，长约为50μm;雌虫阴门距尾3 mm左右，肛门距尾尖500μm,尾末端有小突。说明通过扫描电镜观察3种线虫的外部形态特征有明显的差异，可以用扫描电镜对3种线虫进行鉴定。     

Heartworm in dogs in Canada in 1983

In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.

Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.

     

Heartworm in dogs in Canada in 1985

In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).

Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.

     

Heartworm in dogs in Canada in 1988

In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%).     

Heartworm in dogs in Canada in 1984

In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.

Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.

     

Heartworm in dogs in Canada in 1991

In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium.     

Heartworm in dogs in Canada in 1989

In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.

Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.

     

Heartworm in dogs in Canada in 1987

In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%).     

Heartworm in dogs in Canada in 1986

In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).

Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.