National Institute of Animal Health quarterly最新文献_第3页

Isolation of chicken anemia agent with MDCC-MSB1 cells from chickens in the field. 用MDCC-MSB1细胞从鸡体内分离鸡贫血剂。

National Institute of Animal Health quarterly Pub Date : 1983-01-01

N Yuasa, T Taniguchi, M Goda, M Shibatani, T Imada, H Hihara

引用次数: 0

Pathogenicity and distribution of avian nephritis virus (G-4260 strain) in inoculated laying hens. 鸡肾炎病毒(G-4260株)在接种蛋鸡中的致病性和分布。

National Institute of Animal Health quarterly Pub Date : 1983-01-01

T Imada, M Maeda, K Furuta, S Yamaguchi, H Kawamura

{"title":"Pathogenicity and distribution of avian nephritis virus (G-4260 strain) in inoculated laying hens.","authors":"T Imada, M Maeda, K Furuta, S Yamaguchi, H Kawamura","doi":"","DOIUrl":"","url":null,"abstract":"Specific-pathogen-free laying hens were inoculated intravenously with the G-4260 strain of avian nephritis virus (ANV). The distribution of the virus in organs, histological changes in main organs, the condition of laying, and egg transmission of the virus were examined in them. Over an experimental period of 27 days, no clinical sings were observed. In a chronological study on the distribution of the virus in organs, the virus was recovered from liver, kidney, jejunum, and rectum for 6 days postinoculation (PI). The virus titer in organ emulsion was the highest in the jejunum of all the main organs. The virus was recovered from the kidney for 8 days PI, although it was not so high in this organ. It was not recovered from the ovary or oviduct. Fluorescent antigens were not observed at all in any material. In a pathological examination, some local inflammatory changes were observed only in the kidney. There were no significant changes in the ovary, oviduct, or any other organ. Antibody appeared 10 days PI and was detectable even 27 days PI, although it was not so high in titer. There was no significant difference in the rate of egg-production between the infected and the sham inoculated groups. No virus was isolated from 111 fertile eggs laid by infected hens over a period from 2 to 27 days PI.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"23 2","pages":"43-8"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17164277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative culture of Rhodococcus equi from the feces of horse. 马粪中马红球菌的定量培养。

National Institute of Animal Health quarterly Pub Date : 1983-01-01

M Nakazawa, C Sugimoto, Y Isayama

引用次数: 0

White spots of the liver in pigs experimentally infected with Ascaris suum. 猪实验性感染猪蛔虫后肝脏出现白斑。

National Institute of Animal Health quarterly Pub Date : 1983-01-01

S Yoshihara, M Nakagawa, H Suda, K Ikeda, K Hanashiro

{"title":"White spots of the liver in pigs experimentally infected with Ascaris suum.","authors":"S Yoshihara, M Nakagawa, H Suda, K Ikeda, K Hanashiro","doi":"","DOIUrl":"","url":null,"abstract":"To make clear the relationship between Ascaris suum infection and the appearance of white spot lesions on the surface of the liver in pigs, three groups of pigs were inoculated orally with embryonated A. suum eggs and observed clinicopathologically. Group A of three pigs were inoculated 21 times with 100 eggs each of the nematode, group B of three pigs 4 times with 50,000 eggs each for 10 weeks, and group C of two pigs 2 times with 50,000 eggs each at a one-week interval. All the pigs were sacrificed at the same time 1 week after the final inoculation. Such signs of the nematode infection as dyspnea, coughing and fever appeared in all the pigs of groups B and C seven days after inoculation to continue for several days. In addition, peripheral blood eosinophilia was recorded in these animals 7 or 14 days after inoculation. At autopsy, mesh-worked white spots, some compact and others lymphonodular, were observed on the surface of the liver in all the pigs of the three groups. Main white spots were mesh-worked and lymphonodular in the pigs of group A. They were severe and compact in group B. Therefore, they were rough to the touch. In group C mesh-worked white spots fused with one another and covered the surface of the liver. These white spot lesions observed were morphologically very similar to those found in the field conditions. Complement-fixating antibodies reacting to adult A. suum antigen were detected only in sera from the pigs of group B. Moreover, antibodies involved in the intradermal reaction of immediate type were found in the pigs of groups A and B.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"23 4","pages":"127-37"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17735576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pathological studies on white spots of the liver in fattening pigs. 育肥猪肝脏白斑的病理研究。

National Institute of Animal Health quarterly Pub Date : 1983-01-01

M Nakagawa, S Yoshihara, H Suda, K Ikeda

{"title":"Pathological studies on white spots of the liver in fattening pigs.","authors":"M Nakagawa, S Yoshihara, H Suda, K Ikeda","doi":"","DOIUrl":"","url":null,"abstract":"Hepatic lesions were found in fattening pigs derived from a farm where swine had been suffering from the multiple occurrence of white spots in the liver. They were examined at a slaughter-house for 18 months. The white spots were classified into three patterns on the basis of the macroscopic appearance; that is a compact, a mesh-worked, and a lymphonodular pattern. Histologically, the following 3 kinds of lesions were seen: (1) Eosinophilic interstitial hepatitis accompanied with intralobular necrosis, arteriolar degeneration, boring focus, granuloma and the existence of Nematoda larvae. (2) Fibrosis accompanied occasionally with infiltration of a few eosinophils and lymphocytes. (3) Lymphofollicular hyperplasia. As to the relationship between macroscopic and histologic patterns, compact white spots were generally produced by eosinophilic interstitial hepatitis. The mesh-worked pattern consisted of eosinophilic interstitial hepatitis or fibrosis, and the lymphonodular pattern of lymphofollicular hyperplasia. The incidence of eosinophilic interstitial hepatitis was relatively high over a period from July to December and rather low over a period from January to June. That of fibrosis was considerably high all the year round. Lymphofollicular hyperplasia showed no distinct seasonal incidence. Intestinal ascarids were frequently detected over a period from August to October. Pigs having CF antibody against Ascaris suum increased in number over a period from August to December. From these results, the cause of the multiple occurrence of white spots in the liver was regarded as A. suum infection.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"23 4","pages":"138-49"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17735577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Streptococcus R (Streptococcus suis type II) infection in pigs in Japan. 日本猪感染R型(猪链球菌II型)。

National Institute of Animal Health quarterly Pub Date : 1983-01-01

R Azuma, F Hara, Y Oonuma, C Sugimoto

{"title":"Streptococcus R (Streptococcus suis type II) infection in pigs in Japan.","authors":"R Azuma, F Hara, Y Oonuma, C Sugimoto","doi":"","DOIUrl":"","url":null,"abstract":"Since the first outbreak of an epizootic disease on a pig farm in Shimane Prefecture in 1979, similar diseases have occurred continually on other 8 pig farms in the same prefecture until 1982. Main clinical symptoms of the disease were recumbency, convulsion, anorexia and paddling. The diseased pigs ranged mostly from 35 to 67 days of age. Monthly fatality on one pig farm for 1 year was 0.2 to 3.6%. Morbidities in affected litters were mostly at a level of 20 to 30% on 7 pig farms. The diseases were diagnosed as streptococcal meningitis and septicemia with each one of endocarditis and pneumonitis by pathological and bacteriological studies on 20 affected pigs. Distribution of piglets from a breeding farm to pig farms was considered as one of the causes of prevalence in the prefecture. Representative 20 strains of the isolates from diseased animals on 9 pig farms were identified as Streptococcus R (Streptococcus suis type II) by biological and serological examinations. For the latter examination, anti-Streptococcus R, S and T sera were prepared. It was also indicated that the disease had occurred in 8 prefectures in addition to Shimane, because positive results had been obtained from 41 strains submitted from those prefectures for serological diagnosis. The minimal inhibitory concentration was examined in 18 drugs to 19 isolates. It was the lowest in ampicillin and thiopeptin of all the drugs.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"23 4","pages":"117-26"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17735575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental studies on vertical infection of mice with Japanese encephalitis virus III. Effect of gestation days at the time of inoculation on placental and fetal infection. 乙型脑炎病毒垂直感染小鼠的实验研究。接种时妊娠天数对胎盘和胎儿感染的影响。

National Institute of Animal Health quarterly Pub Date : 1982-01-01

Y Fujisaki, Y Miura, T Sugimori, Y Murakami, T Ino, K Miura

{"title":"Experimental studies on vertical infection of mice with Japanese encephalitis virus III. Effect of gestation days at the time of inoculation on placental and fetal infection.","authors":"Y Fujisaki, Y Miura, T Sugimori, Y Murakami, T Ino, K Miura","doi":"","DOIUrl":"","url":null,"abstract":"An experiment was carried out on the effect of gestation days at the time of inoculation on the establishment of experimental vertical infection with Japanese encephalitis virus in mice. In it, mice of the CFW strain in a closed colony were inoculated intravenously with a field strain at different times over a period from 3 to 12 days of gestation. After that, an attempt was made to recover the virus from the placenta and fetus to estimate the rate of infection. As a result, placental infection was established not when the virus was inoculated at 3 days of gestation, but when it was inoculated at 4 days of gestation or later. The rate of infection was relatively high when the virus was inoculated at 6 days of gestation or later. Fetal infection was established relatively frequently when the virus was inoculated some time between 7 and 10 days of gestation, but quite infrequently when the virus was inoculated at any other time than this. There was a difference in rate between placental and fetal infection at a given time of inoculation in days of gestation. This difference seemed to have been induced not by a difference in intensity of viremia appearing after inoculation, but by a difference in degree of development between placental and fetal tissues at the time of inoculation.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"22 3","pages":"95-101"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17360195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pathogenicity of avian nephritis virus for embryonating hen's eggs. 禽肾炎病毒对母鸡胚的致病性。

National Institute of Animal Health quarterly Pub Date : 1982-01-01

T Imada, T Taniguchi, S Sato, S Yamaguchi, H Kawamura

{"title":"Pathogenicity of avian nephritis virus for embryonating hen's eggs.","authors":"T Imada, T Taniguchi, S Sato, S Yamaguchi, H Kawamura","doi":"","DOIUrl":"","url":null,"abstract":"The pathogenicity of avian nephritis virus (ANV) for embryonating hen's eggs was studied by various routes of inoculation. When inoculated with ANV by the yolk sac route, 6-day-old embryos showed the highest susceptibility and all of them died 3 to 14 days postinoculation (PI). They manifested hemorrhage and edema of the whole body (3 to 6 days PI) and stunting (7 to 14 days PI). The 50% egg-infective dose of the virus by yolk sac inoculation coincided well with the virus titer expressed in plaque-forming units determined on the monolayer of chicken kidney cell cultures. The virus could be passed serially through the chorioallantoic membrane (CAM) of embryonating hen's eggs. In these eggs the CAM presented edematous thickening at the inoculation site, and the embryo stunting. when inoculated by the CAM route, high virus doses killed all embryos, but low virus doses allowed some of the infected embryos to hatch normally. When inoculated by the allantoic cavity route, the virus did not multiply in the allantoic cavity of embryonating eggs, but some of these eggs became infected. Fluorescent antigens were present only in the kidneys and CAM of embryos infected with the virus. The virus was recovered at a low rate from cloacal swabs of chicks from normally hatched eggs inoculated with the virus by the CAM route. These chicks were variable in growth, but had antibodies against the virus and developed nephritis at 36 days of age.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"22 1","pages":"8-15"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17343494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intrapressures and oxygen contents of air sacs at deformation of expiratory-oxygen-concentration curve in chickens. 鸡呼气-氧浓度曲线变形时的气囊内压和氧含量。

National Institute of Animal Health quarterly Pub Date : 1982-01-01

T Itabisashi

{"title":"Intrapressures and oxygen contents of air sacs at deformation of expiratory-oxygen-concentration curve in chickens.","authors":"T Itabisashi","doi":"","DOIUrl":"","url":null,"abstract":"Intrapressures and oxygen contents of air sacs were measured in adult hens showing spontaneous deformation episodes of expiratory oxygen curve. Differential pressures between air sacs were also determined. The deformation resembled that seen at the time of uneven pulmonary ventilation in mammals. To analyse the mechanism responsible for genesis of the deformation episode, an airway was obstructed in the unilateral extrapulmonary primary bronchus by a small balloon. This maneuver caused the expiratory oxygen curve to deform and values of intrapressure and oxygen content of air sacs to change similarly to those of the spontaneous deformation episode. Some of the latter changes in intrapressure and oxygen content caused by obstruction in the left bronchus were different from those caused by obstruction in the right one. The side of airway obstruction at the spontaneous deformation episode could thus be deduced by this result. It was hypothesized that respiratory air from the lung-air sac system on the obstructed side might have flowed through the clavicular air sac to the primary bronchus on the non-obstructed side and vice versa. This condition might induce large respiratory fluctuations of oxygen content in the clavicular air sac, and would be responsible for plateau inclination (deformation) of the expiratory oxygen curve.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"22 2","pages":"76-87"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18149018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Histopathological definition of the adult and calf types of bovine leukosis. 成年和小牛型牛白血病的组织病理学定义。

National Institute of Animal Health quarterly Pub Date : 1982-01-01

H Yamamoto, T Yoshino, I Matsuda, H Nakajima

{"title":"Histopathological definition of the adult and calf types of bovine leukosis.","authors":"H Yamamoto, T Yoshino, I Matsuda, H Nakajima","doi":"","DOIUrl":"","url":null,"abstract":"Histopathological distinctions were examined on 36 cattle 2 months to 12 years of age affected with leukosis. The distribution of tumors pointed out previously as the characteristic of the adult type of leukosis was observed in 27 adult cases, which, except two, were positive for the immunodiffusion test of bovine leukemia virus (BLV). The noticeable development of massive and lumpy tumors in serosa, loose connective tissue, and lymph nodes seemed to suggest a neoplastic accumulation in areas related to the lymphatic way. Splenic involvement and intrasinusoidal leukotic immigration in the liver were present in cases with the leukemic manifestation of peripheral blood. The neoplastic involvement of bone marrow, however, was difficult to find. On the other hand, in 5 calves and 4 adolescent or adult cattle, the neoplastic proliferation was observed throughout such hematopoietic organs as lymph nodes, bone marrow, liver, spleen, thymus and tonsil. The hepatic lesion was characterized by the neoplastic proliferation in the portal triads No BLV antibody could be detected from these cattle, except one adult. As the conclusion of the present study, the tumor of adult type regarded as the pathologic manifestation of enzootic bovine leukosis is defined as malignant lymphoma (non-Hodgkin's lymphoma or lymphosarcoma) of undifferentiated-, histiocytic-, or poorly- differentiated lymphocytic- cell type. And lymphocytic leukemia seems to be desirable term to distinguish the lymphoid malignancy regarded as the characteristic of the calf type from that of the adult type.","PeriodicalId":76197,"journal":{"name":"National Institute of Animal Health quarterly","volume":"22 3","pages":"115-29"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17360194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0