Prevalence and Characterization of Bacillus cereus Isolates from Clinical and Natural Sources
Abstract:Bacillus cereus clinical isolates recovered from blood, wounds and diarrheal feces as well as natural isolates from normal feces, rice, dehydrated milk, and soil were characterized with respect to their biochemical profiles, antimicrobial susceptibility and enterotoxigenicity. The biochemical profiles of all the isolates were similar regardless of their sources. However, some degree of variability was shown in the Voges-Proskauer, nitrate reduction, and esculin hydrolysis tests and in the ability to grow in the presence of 40% bile. All the isolates were resistant to amoxicillin, oxacillin, and penicillin and susceptible to gentamicin and vancomycin. Susceptibility to cephalothin was variable among the clinical isolates, whereas susceptibility to clindamycin and erythromycin was inconsistent for all of them. The B. cereus clinical isolates recovered from human diarrheal feces were found to be strong producers of diarrheal enterotoxin as revealed by induction of diarrhea in mice and vascular permeability reaction. The clinical isolates recovered from wounds and blood and the natural isolates recovered from rice, milk, and normal feces, on the other hand, were weak producers of diarrheal enterotoxin.
Document Type: Research Article
Affiliations: Department of Microbiology and Immunology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
Publication date: February 1, 1996
More about this publication?
- IAFP Members with personal subscriptions to JFP Online: To access full-text JFP or JMFT articles, you must sign-in in the upper-right corner using your Ingenta sign-in details (your IAFP Member Login does not apply to this website). The Journal of Food Protection (JFP) is a refereed monthly publication. Each issue contains scientific research and authoritative review articles reporting on a variety of topics in food science pertaining to food safety and quality. The Journal is internationally recognized as the leading publication in the field of food microbiology with a readership exceeding 11,000 scientists from 70 countries. The Journal of Food Protection is indexed in Index Medicus, Current Contents, BIOSIS, PubMed, Medline, and many others.
Print and online subscriptions are available to IAFP Members and institutional subscribers. IAFP Members with a subscription to JFP Online will have access to all available JFP and JMFT content. Online visitors who are not IAFP Members or journal subscribers will be charged on a pay-per-view basis. Membership and subscription information is available at www.foodprotection.org.
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Membership Information
- Information for Advertisers
- ingentaconnect is not responsible for the content or availability of external websites