Enumeration and characterization of Aeromonas hydrophila and Aeromonas caviae isolated from grocery store produce
| Autor: | S M Callister, W A Agger |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
Aeromonas caviae
food.ingredient Biology Applied Microbiology and Biotechnology Cell Line Microbiology Hemolysin Proteins food Vegetables Agar Food microbiology Ecology Lysine decarboxylase Cytotoxins Temperature food and beverages Hemolysin biology.organism_classification Culture Media Aeromonas hydrophila Aeromonas Food Microbiology Fermentation Research Article Food Science Biotechnology |
| Zdroj: | Applied and Environmental Microbiology. 53:249-253 |
| ISSN: | 1098-5336 0099-2240 |
| Popis: | Starch-ampicillin agar was used to quantitatively isolate Aeromonas sp. from retail grocery store produce. All produce sampled, including parsley, spinach, celery, alfalfa sprouts, broccoli, and lettuce, contained Aeromonas sp. In most instances, the count of Aeromonas sp. increased 10- to 1,000-fold during 2 weeks of storage at 5 degrees C. Eleven (92%) of 12 kinds of produce yielded cytotoxic Aeromonas sp. Identification as Aeromonas hydrophila was the strongest indicator of cytotoxicity, and all 29 (100%) A. hydrophila isolates and 1 (6%) of 16 A. caviae isolates were cytotoxic. Twenty-seven (90%) of 30 cytotoxic Aeromonas sp. strains produced hemolysins. Strong correlations were also noted between ability to produce cytotoxin and positive Voges-Proskauer, lysine decarboxylase, and sorbitol fermentation reactions. It appears that grocery store produce is a potentially significant source of cytotoxic Aeromonas sp. and should be considered in the epidemiology of A. hydrophila gastroenteritis. |
| Databáze: | OpenAIRE |
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