ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1981.tb00417.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1981.tb00418.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Salmonella typhimurium H391 neurotoxin was sensitive to gamma radiation under in vivo conditions but resistant under in vitro conditions. Cells were detoxified after exposure to a radiation dose of 500 krad while isolated neurotoxin retained toxicity up to a dose of 3,000 krad. Detoxification of S. typhimurium H391 cells after exposure to 500 krad was accompanied by loss of antigenic properties which may be attributed to changes in the physico‐chemical behavior of the neurotoxin moiety after in vivo radiatio

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1981.tb00419.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Five plating media, Hektoen enteric (HE) and xylose lysine deoxycholate (XLD) agars with and without 80 and 5 μg/ml of novobiocin (N), respectively, and brilliant greeen sulfadiazine (BGS) agar with 80 μg/ml of the antimicrobial agent, were analyzed for the recovery of salmonellae from various fresh beef, pork, and poultry meat products. Of the total Samonella positive samples, 50.0% and 82.5% were found on XLD and XLD‐N agars, respectively, 75.0% and 85.0% on HE and HE‐N agars, respectively and 65.0% on BGS agar. HE‐N and BGS media isolated three times more false positives than did XLD‐N agar, while XLD and HE agars gave the highest numbers of false positives. The major H2S producing false positive on XLD and HE agars was Proteus mirabilis. With the addition of N, P. mirabilis was eliminated, and the major H2S producing false positive was almost exclusively Citrobacter freundii. The false positives on BGS agar were predominately distributed among C. freundii, Enterobacter sp., and Kleb

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1981.tb00420.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Cynomologus monkeys (Macaca fascicularis) were tested for their sensitivity and specificity to staphylococcal enterotoxin A (SEA). Thirty‐two of 38 monkeys vomited within 5 h in response to intragastric feeding of 4.8–18 μg of crude SEA. Twenty‐four of these 32 responding monkeys were subjected to specificity study by feeding crude SEA which was neutralized with specific Antiserum A. Twenty‐two (92%) of the 24 demonstrated specificity by not vomiting when fed neutralized crude SEA. The remaining two (8%) monkeys showed specificity only with purified SEA neutralized with the Antiserum. The emetic dose ‐50 for crude SEA was 6.5 μg per monkey. These suggest that cynomologus monkeys are suitable for SE bioassay and for identification of new e

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1981.tb00421.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Repeated (five) doses of pyridoxine chloride (vitamin B6, 10 mg) reduced botht he neurological symptoms caused by ethylidene gyromitrin, the main poisonous compound of the mushroom false morel (Gyromitra esculenta pers. Fr.), and the overall mortality due to ethylidene gyromitrin poisoning in mice treated orally with this poison (400 mg/kg). In contrast, little or no effect was found when the mice were treated with γ‐aminobutyric acid (1 mg) or vitamin C (10 mg) after treatment with poison. The significance of these findings is discussed in perspective to possible treatments of human poisonings caused by false mor

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1981.tb00422.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Book reviewed in this articleFood Safety.Edited by H. R. Roberts.

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1981.tb00423.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY