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1.
《中国兽医学报》2019,(12):2364-2367
观察X线照射后细粒棘球绦虫原头蚴体外培养下成囊率的变化,初步探索X线照射对原头蚴成囊过程的影响。新鲜采集自然感染细粒棘球蚴的绵羊肝脏,无菌分离原头蚴体外培养,将X线照射分为0,10,20,30,40,50,60 Gy共7个剂量,于单次大剂量照射后观察各组形态变化,计算成囊率。结果显示,单次大剂量照射原头蚴后体外培养14 d,对照组光镜下可见原头蚴成囊发展,大部分原头蚴已成囊,顶突消失,囊外周已有角质层出现;而照射组出现不同程度的钩突崩解,正常结构消失。不同剂量X线照射后14 d统计原头节的成囊率各不同剂量照射组与对照组比较差别有统计学意义(P0.05)。结果表明,X放射线可抑制细粒棘球绦虫原头蚴向成囊方向发展,这将为X线对原头蚴及包囊的杀灭作用机制研究奠定一定的理论基础。 相似文献
2.
细粒棘球绦虫——原头蚴在两种细胞培养液中体外培养的初步观察 总被引：1，自引：0，他引：1
通过原头蚴在两种细胞培养液中（RPMI-1640和MEM）培养,观察其存活、生长及发育情况,从而为研究寄生虫发育提供最基本的数据资料。方法：细粒棘球绦虫幼虫——原头蚴培养的细胞培养基（RPMI-1640和MEM）分为4组：Ⅰ组为纯RPMI-1640培养液;Ⅱ组为含10％的小牛血清的1640培养液;Ⅲ组为纯MEM培养液;Ⅳ组为含10％的小牛血清的MEM培养液;并进行对比观察。结果：培养15d的原头蚴的成活率分别为：Ⅰ组69．87％、Ⅱ组80．35％、Ⅲ组50．25％、Ⅳ组60．32％;成囊率分别为：Ⅰ组80．58％、Ⅱ组90．25％、Ⅲ组35．65％、Ⅳ组45．89％;头节外翻率分别为：Ⅰ组95．50％、Ⅱ组98．65％、Ⅲ组60．52％、Ⅳ组70．98％。结论：大多数虫体在早期向囊发育,一部分虫体头节外翻,并伴有规律的伸缩运动,但随时间的延长虫体运动减缓,又向囊蚴发育。通过对细粒棘球绦虫的原头蚴的体外培养,初步表明含有10％小牛血清的细胞培养基RPMI-1640较适合原头蚴的生长发育,在普通培养箱中培养,最适温度在37—40℃,培养液pH=7．2,初步建立了原头蚴体外培养的方法。 相似文献
3.
应用吡喹酮对绵羊多头蚴病进行治疗试验。结果表明：用吡喹酮７０ｍｇ／ｋｇ体重剂量深部肌肉注射效果最佳，能完全杀死囊泡内的原头蚴，治愈率达１００％。 相似文献
4.
羊多头蚴病是由于多头带绦虫的幼虫即脑多头蚴寄生在羊的脑内,引起神经症状,甚至死亡的一种寄生虫病。1病原脑多头蚴,又称为脑包虫,属于绦虫类,是多头带绦虫的幼虫,呈现囊泡状,有的呈现豌豆粒大小,随着长到鸡蛋大小,囊内可以有一百多个原头蚴,一般有芝麻大小,原头蚴直径2-3mm。寄生在羊的脑内,是羊发生疾病的源头。 相似文献
5.
应用常规病理学和组织学技术,检查丙硫咪唑治疗后自然感染细粒棘球蚴的藏系绵羊体内棘球蚴囊的大小,所含囊液的量及原头蚴的存活力。大体观察显示棘球蚴囊大部分萎缩、钙化。光镜下观察到角质层变性、断裂,嗜酸性增强;生发层核浓缩或消失,甚至全部脱落坏死;原头蚴崩解为碎片。并见大量炎性细胞浸润。 相似文献
6.
脑多头蚴病（脑包虫病）是由于多头绦虫的幼虫—多头蚴寄生在绵羊、山羊的脑、脊髓内,引起脑炎、脑膜炎及一系列神经症状（周期性转圈运动）,甚至死亡的严重寄生虫病。多头蚴还可危害黄牛、牦牛、猪、马甚至人类。成虫则寄生于犬、狼、狐、豺等肉食兽的小肠。该病多见于犬活动频繁的地方。1病原（1）多头蚴呈囊泡状,囊状可由豌豆大至鸡蛋大,囊内充满透明液体,在囊的内壁上有100～250个原头蚴,原头蚴直径2～3mm。 相似文献
7.
羊脑包虫病又称羊多头蚴病,是由多头绦虫的幼虫寄生于牛羊等动物的脑和脊髓中所引起的寄生虫病,人亦可感染.多呈地方性流行,可致动物死亡,是危害羔羊和犊牛的重要寄生虫病.多头蚴的成虫是寄生于犬小肠的多头绦虫,原头蚴直径为2～3毫米,数目为100～250个,中绦期为多头蚴,呈囊泡状,囊体由豌豆到鸡蛋大,囊内充满透明液体,囊内膜附有许多原头蚴.
多头绦虫寄生于犬、狼、狐狸(终末宿主)的小肠内,孕节片脱落随粪便排出体外,节片与虫卵散布于草场,污染饲草料、饮水,被羊只(中间宿主)吞食而进入胃肠道.六钩蚴逸出,钻入肠黏膜血管内,其后随血液被带到脑脊髓中,经2～3个月发育成多头蚴.六钩蚴在羔羊体内发育较快,感染后2星期发育至粟粒大小,6星期后囊体2～3毫米.含有多头蚴的脑被犬类动物吞食后,多头蚴的头节吸附于小肠壁,发育为成虫. 相似文献
8.
补体对体外细粒棘球蚴原头蚴有较强杀伤作用，单抗介入后能加强这一作用。由此表明宿主体液因子对原头蚴的免疫机理可能有3，即补体经典途径、补体旁路途径和抗体直接作用。 相似文献
9.
棘球蚴病是由细粒棘球绦虫的幼虫 (棘球蚴 )寄生在一些哺乳动物 (中间宿主 )体内而引起。本病遍布全球 ,在单峰驼中呈高水平的地方性流行 ,在流行地区 ,单峰驼是中间宿主。据报道 ,本病在单峰驼中的感染率为 1 7%～ 80 % ,在绵羊中的感染率为 1 .3%～ 2 0 %。细粒棘球绦虫在家畜体内一般有一个完整的生活周期 ,但在单峰驼体内这样一个周期却很少能够维持 ,因为 EIBiharl( 1 985 )证实 ,从感染的骆驼体内分离到的大部分是不育囊 (无原头蚴的囊 )。中间宿主可在出生后 ,采食或饮用含有细粒棘球绦虫虫卵的食肉目动物(终末宿主 )粪便污染的饲… 相似文献
10.
按照多房棘球绦虫幼虫-泡球蚴培养的培养基（RPMI-1640、M199和MEM）分为3组：Ⅰ组为含10％胎牛血清的RPMI-1640;Ⅱ组为含10％胎牛血清的MEM;HI组为含10％胎牛血清的M199。将泡球蚴在3种细胞培养液中进行培养,观察其存活、生长以及发育情况。结果显示,培养9d的泡球蚴的成活率分别为：Ⅰ组90．10％、Ⅱ组50．25％、Ⅲ组22．03％;成囊率分别为：Ⅰ组57．12％、Ⅱ组63．15％、Ⅲ组48．17％;头节外翻率分别为：Ⅰ组98．28％、Ⅱ组88．65％、Ⅲ组75．50％。可见,大多数虫体在早期向囊发育,一部分虫体头节外翻,并伴有规律的伸缩运动,但随时间的延长虫体运动减缓,又向囊蚴发育。通过对多房棘球绦虫泡球蚴的体外培养,初步表明合有10％小牛血清的细胞培养基RPMI-1640较适合泡球蚴的生长发育,为研究寄生虫发育提供了最基本的数据资料。 相似文献
11.
The development of the parasite and lesions was studied in 32 sheep killed 10 days to 47 months after inoculation with Sarcocystis gigantea sporocysts from cats. At 21-42 days post-inoculation (d.p.i.), there was a mild encephalitis, but organisms were not seen in the brain. Immature sarcocysts were detected from 40-84 d.p.i. The cyst wall was not measurable by light microscopy at 40 d.p.i., but was 1.5-2 microns thick at 84 d.p.i. At 119 d.p.i. both immature cysts containing only metrocytes, and mature cysts containing both metrocytes and merozoites, were present. These mature cysts did not have a secondary cyst wall. A mature cyst, 350 microns in length, was found in a sheep killed at 8 1/2 months p.i. At 10 m.p.i. cysts were up to 0.5 mm long and a secondary cyst wall was present. At 47 m.p.i. cysts were 2-5 X 4.5-7.5 mm, and were found only in the muscles of tongue, oesophagus, pharynx and flank. 相似文献
12.
Use of milk progesterone enzyme immunoassay for differential diagnosis of follicular cyst, luteal cyst, and cystic corpus luteum in cows 总被引：1，自引：0，他引：1
T Nakao A Sugihashi N Saga N Tsunoda K Kawata 《American journal of veterinary research》1983,44(5):888-890
In 160 cows with ovarian cysts as determined by rectal palpation, differentiation was made of follicular cyst, luteal cyst, and cystic corpus luteum on the basis of milk progesterone concentrations estimated by an enzyme immunoassay before and at 10 days after cows were treated with gonadotropin-releasing hormone. Cows having a progesterone concentration in skim milk less than 1.0 ng/ml were considered to have follicular cysts and those with concentrations of 1.0 ng/ml or higher were regarded as the cases of luteal cyst or cystic corpus luteum. Luteal cyst was characterized by progesterone values remaining high in the cows for 10 days after treatment, and cystic corpus luteum was characterized by a decrease in progesterone concentration after cows were treated. By the rectal palpation procedure it was impossible to differentiate luteal cyst and cystic corpus luteum from follicular cyst. The frequencies of follicular cyst, luteal cyst, and cystic corpus luteum were 65%, 19%, and 16%, respectively. Of 104 cows with follicular cysts as defined by milk progesterone assay result, 73 (70%) responded to the treatment with gonadotropin-releasing hormone, the milk progesterone concentration increasing from 0.7 +/- 0.2 ng/ml (mean +/- SD) to 1.8 +/- 1.1 ng/ml. The accuracy of rectal palpation 10 days after treatment for judgment of luteinization of follicular cyst confirmed by milk progesterone analysis was only 30% (48 cows of 160). 相似文献
13.
B Gjerde 《Acta veterinaria Scandinavica》1984,25(2):195-204
Fresh preparations of micro-isolated sarcocysts from skeletal and cardiac muscle of 12 reindeer were examined by light microscopy. On the basis of cyst structure and cyst wall structure 4 Sarcocystis spp. could be differentiated. New names have been proposed for 2 previously unnamed Sarcocystis spp. of reindeer, and S. grueneri has been redefined.S. rangiferi n. sp. had macroscopic cysts in skeletal muscle measuring 2106×403 µm. The cyst wall protrusions were finger-like and measured 13.2×6.7 µm. The cysts were surrounded by a layer of fibrillar material.S. tarandi n. sp. had micro- to macroscopic cysts primarily in skeletal muscle, but a few cysts were found in the heart of one animal. In skeletal muscle the cysts measured 999×75µm; in the heart the cysts were shorter and wider. The cyst wall protrusions were fingerlike and measured 9.2×2.2 µm.S. grueneri had micro- to macroscopic cysts in cardiac muscle measuring 581×137 µm. The cyst wall was thin and relatively smooth with no visible protrusions.Sarcocystis sp. had micro- to macroscopic, slender cysts in skeletal muscle measuring 916×64 µm. The cyst wall had tightly packed, short, knob-like protrusions. The cysts of this species were previously classified as cysts of S. grueneri. 相似文献
14.
The development of the parasite was studied in 48 sheep killed between 188 and 1132 days after experimental inoculation with Sarcocystis medusiformis sporocysts from cats. Immature sarcocysts were present at 188 days post inoculation (d.p.i.). At 331 d.p.i. macroscopic sarcocysts with an elongate fusiform appearance were seen in the laryngeal, abdominal and diaphragm musculature. The largest cyst measured 2 mm in length by 0.5 mm in width at 331 d.p.i.; histologically they contained metrocytes at the periphery of the cyst with more densely staining merozoites in the central region. By 443 d.p.i. typical 'thin' cysts 2-3.5 mm in length were seen in the flank and external thoracic muscles. By 765 d.p.i. sarcocysts were 5 mm in length. The ultrastructure of the cyst wall of these cysts resembled that of S. medusiformis. At 1132 d.p.i. sarcocysts measured 4 mm X 0.5 mm. 相似文献
15.
Slovis NM Watson JL Couto SS 《Journal of the American Veterinary Medical Association》2001,219(3):338-40, 324-5
A 6-month-old Morgan colt was evaluated because of a 10-cm right-sided retropharyngeal swelling. The swelling was soft and moveable on examination, and palpation did not elicit signs of pain. Radiography revealed a large space-occupying mass ventral to the second cervical vertebra; ultrasonography revealed an anechoic fluid-filled structure with a well-defined hyperechoic capsule. Fine-needle aspiration yielded a viscous amber fluid. Cytologic evaluation indicated that the fluid was an exudate; anaerobic and aerobic bacterial culture did not yield any growth. Histologic examination of a portion of the cyst capsule revealed a connective tissue wall lined by pseudostratified columnar to cuboidal epithelium, consistent with a branchial cyst. The cyst wall was marsupialized to the skin, and iodine sclerotherapy was performed twice daily for 14 days, at which time forceps were introduced into the cyst and the cyst lining was removed. The site was allowed to heal by second intention, but 10 days later, the swelling recurred. An incision was made over the previous marsupialization site, and residual remnants of the cauterized cyst lining were removed with a forceps. The foal did not have any other complications during the subsequent 2 years. Branchial arch cysts are uncommon embryonic anomalies of horses, mice, cats, dogs, and cattle. Results suggest that marsupialization and iodine sclerotherapy may be a viable alternative to surgical excision in horses with branchial cysts; however, the entire cyst lining must be removed at the completion of sclerotherapy to prevent recurrence and abscess formation. 相似文献
16.
Diagnosis of luteal and follicular ovarian cysts by palpation per rectum and linear-array ultrasonography in dairy cows. 总被引：1，自引：0，他引：1
P W Farin R S Youngquist J R Parfet H A Garverick 《Journal of the American Veterinary Medical Association》1992,200(8):1085-1089
The purpose of this study was to determine and compare the accuracy of palpation per rectum and linear-array ultrasonography for diagnosing follicular vs luteal ovarian cysts in cows. Forty-seven examinations of ovarian cysts from 28 cows were diagnosed by palpation per rectum as either a firm, thick-walled structure (luteal cyst) or a soft, thin-walled structure (follicular cyst) during weekly herd examinations. The ovaries of each cow were then examined by ultrasonography. Ultrasonograms of cysts greater than 25 mm in diameter were diagnosed as luteal or follicular cysts and were recorded on videotape for evaluation by a second clinician. Serum progesterone concentrations at the time of examination were determined by radioimmunoassay and used to classify luteal (greater than 0.5 ng/ml) or follicular (less than or equal to 0.5 ng/ml) cysts. Selection of this discriminatory level was based on response of a proportion of cows with luteal cysts that were given 25 mg of prostaglandin F2 alpha at the time of diagnosis by ultrasonography. Sensitivity and specificity of palpation per rectum for diagnosis of type of ovarian cyst were low (43.3 and 64.7%, respectively). In contrast, sensitivity and specificity of ultrasonography were considerably higher (86.7 and 82.3%, respectively). Agreement between the 2 methods of diagnosis was 57.4%. Overall agreement between the 2 clinicians' diagnoses by ultrasonography was 85.1%. On the basis of our findings, we confirm that luteal and follicular cysts cannot be accurately differentiated by palpation per rectum alone. These data suggest that linear-array ultrasonography is more effective than palpation per rectum for diagnosing type of ovarian cyst in cows. 相似文献
17.
For this investigation 50 Brown Swiss cows from 21 different farms were used. Twenty-five peripartal overconditioned cows (back fat thickness > 38 mm) were compared with 25 peripartal not overconditioned animals (back fat thickness < 38 mm). On days 20, 30 and 40 post partum the ovaries were examined sonographically and 10, 15, 20, 30 and 40 days after calving plasma concentrations of progesterone and 17-beta estradiol were determined. In peripartal overconditioned animals 12 ovarian cysts were found while only one cyst was present in not overconditioned cows (P < 0.05). At first examination all ovarian cysts were classified by ultrasound as follicle theca cysts (progesterone < 0.5 ng/ml plasma). Follow examinations resulted in 3 cysts which persisted as theca cysts while 8 cysts became luteinized and 2 cysts completely regressed. There was no indication of increased plasma progesterone and/or estradiol concentrations in overconditioned cows with higher fat deposit before of ovarian cysts had occurred. 相似文献
18.
Several studies have clarified that the follicular cysts degenerate and are replaced by newly growing follicles that develop into new follicular cysts without ovulation, i.e., turnover of ovarian follicular cysts in cows. However, the relativity of endocrinological changes, including the inhibin profile during turnover of spontaneous follicular cysts in dairy cows, is still unclear. In the present study, the relationship between turnover of follicular cysts and changes in the peripheral blood concentrations of progesterone (P), estradiol-17beta (E(2)), luteinizing hormone (LH), follicle stimulating hormone (FSH) and inhibin were examined in lactating dairy cows. Five cows diagnosed with follicular cysts (follicles of more than 25 mm in diameter in the absence of a corpus luteum) were investigated. Their ovarian dynamics were monitored using ultrasonography, and blood samples were collected at 2- or 3- day intervals throughout the experiment. The day when a follicle fated to become a follicular cyst reached more than 8 mm in diameter was defined as the start of a cystic follicular wave. Four of the 5 cows exhibited a similar patterns of cystic follicular changes and hormone profiles. The data from the 4 cows was used for analysis of the relationships between turnover of cystic follicles and the hormone profiles. Two or three new cystic follicular waves occurred in each cow during the experimental period. The mean diameter of the cystic follicles was more than 25 mm 13 to 15 days after the start of the cystic follicular wave, and it began to decrease 1 to 6 days before the start of the subsequent cystic follicular wave. The levels of E(2) and inhibin tended to decrease for 7 to 9 days before the start of a new cystic follicular wave and to increase concomitantly with new follicular cyst growth. The levels of FSH rose for 1 to 3 days before the start of a new cystic follicular wave. The present study clarified the relationship between FSH and inhibin during turnover of spontaneous follicular cysts in dairy cows and found that it was very similar to previous results for cows. The present results suggest that an increase in FSH secretion following a reduction in inhibin secretion triggers turnover of cystic follicles in cows with spontaneous follicular cysts. 相似文献
19.
用多房棘球绦虫(Echinococcus multilocularis,Em)原头蚴继发感染一线仓鼠(坎培尔仓鼠Dwarf Campbells RussianHamster)、冬白仓鼠(倭仓鼠Phodopus sungoris sungoris)、金丝熊仓鼠(黄金鼠Mesocricetus auratus)、松鼠(Sciurusvulgaris)4种宠物鼠各4只。接种70 d后剖解各种宠物鼠1只,一线仓鼠、金丝熊仓鼠、松鼠未发现包囊泡,冬白仓鼠分离出包囊泡4.37 g,占体重的7.23%;接种95 d后4种宠物鼠的平均湿包囊泡重和包囊泡重占体重的百分比分别为:冬白仓鼠13.05g和33.03%,金丝熊仓鼠2.22 g和1.98%,松鼠2.28 g和3.54%,冬白仓鼠、金丝熊仓鼠和松鼠都出现成熟原头蚴,一线仓鼠未发现包囊泡。试验证明冬白仓鼠、金丝熊仓鼠和松鼠对多房棘球绦虫原头蚴较敏感,可以作为Em的中间宿主。 相似文献
20.
Lievaart JJ Parlevliet JM Dieleman SJ Rientjes S Bosman E Vos PL 《Tijdschrift voor diergeneeskunde》2006,131(12):438-442
On dairy farms covered by the ambulatory service of the Department of Farm Animal Health, 55 Holstein-Friesian cows with suspected ovarian follicular cysts on the basis of rectal palpation underwent confirmatory transrectal ultrasonography. An ovarian follicular cyst was confirmed in 28 cows (50.9%) and was treated by single transvaginal-guided needle aspiration. Cows with a corpus luteum or a luteinized cyst were not treated. After aspiration, 82.1% (n=23) of the cows showed oestrus behaviour at 13.3 +/- 6.0 days. Artificial insemination was performed during the first heat after cyst aspiration and resulted in a pregnancy rate of 64.2%. In conclusion, single transvaginal-guided needle aspiration of ovarian follicular cysts is an easy and good method for the treatment of follicular cysts. Moreover, it is a safe and good alternative method for the manual, active rupturing of cysts during rectal palpation. 相似文献