Journal of veterinary medicine. B, Infectious diseases and veterinary public health最新文献_第10页

Effect of long-term oral administration of an immunostimulant diet on innate immunity in sea bass (Dicentrarchus labrax). 长期口服免疫刺激饲料对黑鲈先天免疫的影响。

Journal of veterinary medicine. B, Infectious diseases and veterinary public health Pub Date : 2000-12-01 DOI: 10.1046/J.1439-0450.2000.00412.X

M. Bagni, L. Archetti, M. Amadori, G. Marino

{"title":"Effect of long-term oral administration of an immunostimulant diet on innate immunity in sea bass (Dicentrarchus labrax).","authors":"M. Bagni, L. Archetti, M. Amadori, G. Marino","doi":"10.1046/J.1439-0450.2000.00412.X","DOIUrl":"https://doi.org/10.1046/J.1439-0450.2000.00412.X","url":null,"abstract":"Immunostimulants represent a modern and promising tool in aquaculture, enhancing the resistance of cultured fish to disease and stress. This study investigated the effect of a combination of dietary glucans, alpha-tocopherol and ascorbic acid on the innate immune response of cultured sea bass (Dicentrarchus labrax). After 5 weeks of adaptation on a commercial diet containing 100 p.p.m. ascorbic acid and 200 p.p.m. alpha-tocopherol, sea bass were switched to a diet supplemented with 2% beta-1.3/beta-1.6 glucans and ascorbic acid and alpha-tocopherol at 500 p.p.m. The supplemented diet was given at 2% of body weight per day over a 2-week period, every 3 months. Plasma lysozyme concentration, content and distribution of major plasma proteins and complement activity were measured prior to feeding the supplemented diet and after 40 weeks. Alternative pathways of complement activation and lysozyme activity were both significantly enhanced in fish fed on glucans and elevated doses of vitamins. No significant differences were observed in protein content or in albumin/globulin ratio. Compared to lysozyme activity, which showed marked individual variation, complement-mediated haemolytic activity has been shown to be a more reliable indicator of sea bass immunocompetence. Further studies are in progress to clarify the effect of each dietary component on the innate immune response and disease resistance.","PeriodicalId":17659,"journal":{"name":"Journal of veterinary medicine. B, Infectious diseases and veterinary public health","volume":"61 1","pages":"745-51"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91134932","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: 78

A study of the ability of a TK-negative and gI/gE-negative pseudorabies virus (PRV) mutant inoculated by different routes to protect pigs against PRV infection. 不同途径接种tk阴性和gI/ ge阴性伪狂犬病毒(PRV)突变体对猪抗PRV感染能力的研究

Journal of veterinary medicine. B, Infectious diseases and veterinary public health Pub Date : 2000-12-01 DOI: 10.1046/J.1439-0450.2000.00407.X

M. Ferrari, A. Brack, Maria Grazia Romanelli, Tc Mettenleiter, Attilio Corradi, N. D. Mas, Mn Losio, R. Silini, C. Pinoni, A. Pratelli

{"title":"A study of the ability of a TK-negative and gI/gE-negative pseudorabies virus (PRV) mutant inoculated by different routes to protect pigs against PRV infection.","authors":"M. Ferrari, A. Brack, Maria Grazia Romanelli, Tc Mettenleiter, Attilio Corradi, N. D. Mas, Mn Losio, R. Silini, C. Pinoni, A. Pratelli","doi":"10.1046/J.1439-0450.2000.00407.X","DOIUrl":"https://doi.org/10.1046/J.1439-0450.2000.00407.X","url":null,"abstract":"The capacity of a TK-negative (TK-) and gI/gE-negative (gI/gE-) pseudorabies virus (PRV) mutant to protect pigs against Aujeszky's disease carried out by experimental infection with a virulent PRV strain, was tested. There were three groups, each of four susceptible pigs which were inoculated twice by two different schedules. Group 1 received the modified virus by the intradermal (first inoculation)-intramuscular (second inoculation) routes; group 2 was treated by the intranasal (first inoculation)-intramuscular (second inoculation) routes. The third group was left untreated as the control. All of the pigs were challenged intranasally with a virulent PRV strain and they were subsequently injected with dexamethasone. Two pigs in each group were necropsied on days 5 and 15 after dexamethasone inoculation. The challenge exposure resulted in mild clinical signs, increase in growth and a shorter period of virus shedding in vaccinated pigs, whereas the control group showed severe signs of Aujeszky's disease. No difference in the titre of the virulent virus which was excreted by pigs of all three groups, was observed and all animals seroconverted. Both the mutant strain and the wild-type virus established a latent infection although only the latter was reactivated and shed. Slight lesions were observed in target tissues of the vaccinated animals and no significant differences were detected between the two inoculation schedules.","PeriodicalId":17659,"journal":{"name":"Journal of veterinary medicine. B, Infectious diseases and veterinary public health","volume":"153 1","pages":"753-62"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76152264","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: 24

Varying effects of infections with Mycoplasma hyopneumoniae on the weight gain recorded in three different multisource fattening pig herds. 肺炎支原体感染对三种不同多源育肥猪群增重的不同影响。

Journal of veterinary medicine. B, Infectious diseases and veterinary public health Pub Date : 2000-08-01 DOI: 10.1046/j.1439-0450.2000.00370.x

E Rautiainen, A M Virtala, P Wallgren, H Saloniemi

{"title":"Varying effects of infections with Mycoplasma hyopneumoniae on the weight gain recorded in three different multisource fattening pig herds.","authors":"E Rautiainen, A M Virtala, P Wallgren, H Saloniemi","doi":"10.1046/j.1439-0450.2000.00370.x","DOIUrl":"https://doi.org/10.1046/j.1439-0450.2000.00370.x","url":null,"abstract":"Pigs in three specialized fattening herds were studied with respect to the effect of infection with Mycoplasma hyopneumoniae on weight gain. Individual pigs were weighed four times at 4-week intervals during the fattening period and their daily weight gain over the rearing period was calculated. A blood sample was collected on each weighing occasion and analysed for the presence of antibodies to M. hyopneumoniae. The lungs of the principals were inspected at slaughter and the extent of pneumonic lesions was registered by a specially developed technique that has been proven to warrant a high degree of repeatability. No serum antibodies to M. hyopneumoniae were detected in one of the herds, and no pneumonic lesions were recorded at slaughter in that herd. In the other two herds, the prevalence of pigs with serum antibodies to M. hyopneumoniae increased from 6 to 54% and from 31 to 81%, respectively, during the fattening period. The prevalence of pneumonic lesions at slaughter in these herds was higher the later the pigs seroconverted. On the other hand, the extension of the lung lesions tended to be higher among pigs that seroconverted early during the rearing period. Infections with M. hyopneumoniae acquired early during the rearing, presumably strengthened by secondary infections and environmental errors, was found to decrease the daily weight gain of the pigs. However, even non-complicated M. hyopneumoniae infections acquired late in the fattening period were associated with reduced daily weight gain. That growth reduction was estimated to be at least 60 g (about 6%) after adjusting for herd, pen, initial weight and sex.","PeriodicalId":17659,"journal":{"name":"Journal of veterinary medicine. B, Infectious diseases and veterinary public health","volume":"47 6","pages":"461-9"},"PeriodicalIF":0.0,"publicationDate":"2000-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1046/j.1439-0450.2000.00370.x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21847692","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: 15

The sensitivities of various erythrocytes in a haemagglutination assay for the detection of psittacine beak and feather disease virus. 各种红细胞的敏感性在血凝试验检测鹦鹉喙和羽毛病病毒。

Journal of veterinary medicine. B, Infectious diseases and veterinary public health Pub Date : 2000-08-01 DOI: 10.1046/j.1439-0450.2000.00360.x

N Sanada, Y Sanada

引用次数: 25

Effectiveness of doxycycline in the prevention of an experimental infection with Actinobacillus pleuropneumoniae in pigs. 强力霉素预防猪实验性胸膜肺炎放线杆菌感染的效果。

Journal of veterinary medicine. B, Infectious diseases and veterinary public health Pub Date : 2000-08-01 DOI: 10.1046/j.1439-0450.2000.00368.x

I Luque, C Tarradas, L Carrasco, E Torroella, C Artigas, A Perea

{"title":"Effectiveness of doxycycline in the prevention of an experimental infection with Actinobacillus pleuropneumoniae in pigs.","authors":"I Luque, C Tarradas, L Carrasco, E Torroella, C Artigas, A Perea","doi":"10.1046/j.1439-0450.2000.00368.x","DOIUrl":"https://doi.org/10.1046/j.1439-0450.2000.00368.x","url":null,"abstract":"The effectiveness of medication with doxycycline in feed in the control of pleuropneumonia in pigs was tested using an Actinobacillus pleuropneumoniae serotype 1 aerosol challenge model. Two groups of 10 animals were used for the challenge, a 'medicated group' and an 'unmedicated group'. A third group of four animals was used as a 'control group'. Pigs from the medicated group were provided with feed containing 250 p.p.m. doxycycline (HIPRAMIX/DOXI) for 8 consecutive days and were challenged on the fifth day of treatment. No clinical signs were observed in pigs from the 'control group'. Four animals from the 'unmedicated group' died within the first 48 h after challenge with clinical and lesional evidence of an acute form of pleuropneumonia. Clinical signs of animals surviving the first 48 h were progressively less severe and showed lesions similar to those described for subacute-chronic forms of the disease. However, only one animal from the 'medicated group' showed clinical signs of a chronic form of pleuropneumonia. Reisolation of A. pleuropneumoniae was more evident from lung tissues of animals fed the doxycycline-free feed (70%), coinciding with the presence of both acute and subacute lesions. However, the micro-organism could be reisolated from only one animal which belonged to the 'medicated group'. It is concluded that the treatment of pigs with 250 p.p.m. doxycycline (HIPRAMIX/DOXI) prevents disease caused by A. pleuropneumoniae.","PeriodicalId":17659,"journal":{"name":"Journal of veterinary medicine. B, Infectious diseases and veterinary public health","volume":"47 6","pages":"445-51"},"PeriodicalIF":0.0,"publicationDate":"2000-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1046/j.1439-0450.2000.00368.x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21847691","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: 2

Occurrence of chlamydiae in the genital tracts of sows at slaughter and their possible significance for reproductive failure. 屠宰母猪生殖道中衣原体的发生及其对繁殖失败的可能意义。

Journal of veterinary medicine. B, Infectious diseases and veterinary public health Pub Date : 2000-08-01 DOI: 10.1046/j.1439-0450.2000.00415.x

M Busch, R Thoma, I Schiller, L Corboz, A Pospischil

{"title":"Occurrence of chlamydiae in the genital tracts of sows at slaughter and their possible significance for reproductive failure.","authors":"M Busch, R Thoma, I Schiller, L Corboz, A Pospischil","doi":"10.1046/j.1439-0450.2000.00415.x","DOIUrl":"https://doi.org/10.1046/j.1439-0450.2000.00415.x","url":null,"abstract":"The aim of this study was to investigate further the role of chlamydiae as pathogens in the genital tracts of sows at slaughter. Genital tracts of 101 randomly selected sows were collected and specimens of genital tract localizations were systematically examined for chlamydiae using immunohistochemistry and PCR. In the genital tracts of 10 sows, Chlamydia psittaci DNA was detected by PCR, and was further typed as 'serotype 1' in nine cases and as avian strain 6 BC in one animal. However, all specimens examined by immunohistochemistry were negative for chlamydiae. Pooled samples of scalding tank water were additionally investigated for 95 animals. Of these samples, 63.2% contained chlamydial DNA, mostly C. trachomatis, and in one sample C. psittaci 'serotype 1'. Although in most cases contamination through influx of faecally contaminated scalding water is a possible reason for the positive PCR results in the genital tract, latent infection cannot be excluded. In conclusion, the results obtained suggest that chlamydiae are of no or only minor importance in the examined group of Swiss breeding sows. Nevertheless, the role and significance of chlamydiae as pathogens in porcine reproductive disorders remain unresolved and require further investigation.","PeriodicalId":17659,"journal":{"name":"Journal of veterinary medicine. B, Infectious diseases and veterinary public health","volume":"47 6","pages":"471-80"},"PeriodicalIF":0.0,"publicationDate":"2000-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1046/j.1439-0450.2000.00415.x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21847693","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: 36