Abstract
When cod (Gadus morhua morhua) and headless white shrimp (Penaeus setiferus) were gamma irradiated with a series of low-ionizing radiation doses, a "shoulder(s)" was observed in the graph (log microbial counts versus dose) in the approximate range of 25 to 75 krads. When the microbiological survivors were differentiated into total counts, proteolytic and pseudomonad-type bacteria, it was observed that the pseudomonad-type bacteria were rapidly destroyed by 25 krads and that proteolytic bacteria were destroyed at a faster rate than the rest of the microorganisms. When cod fillets and shrimp were compared with their respective homogenates and irradiated at doses of 0, 10, 20, 30, 40, 50, 60, 80, 100, 150, 200, and 300 krads, the homogenates did not exhibit the characteristic shoulders. A further experiment was designed to test surface versus uniform dispersion of microorganisms on/in gelatin disks subjects to low doses of irradiation. Differences were found that may explain the observed differences between solid food materials such as fish fillets and shrimp and their homogenates.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- ADAMS R., FARBER L., LERKE P. BACTERIOLOGY OF SPOILAGE OF FISH MUSCLE. II. INCIDENCE OF SPOILERS DURING SPOILAGE. Appl Microbiol. 1964 May;12:277–279. doi: 10.1128/am.12.3.277-279.1964. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dyer J. K., Anderson A. W., Dutiyabodhi P. Radiation survival of food pathogens in complex media. Appl Microbiol. 1966 Jan;14(1):92–97. doi: 10.1128/am.14.1.92-97.1966. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kazanas N. Proteolytic activity of microorganisms isolated from freshwater fish. Appl Microbiol. 1968 Jan;16(1):128–132. doi: 10.1128/am.16.1.128-132.1968. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sinskey T. J., Pablo I. S., Silverman G. J., Ronsivalli L. Effect of packaging on the major microbial flora of irradiated haddock. Nature. 1967 Jan 28;213(5074):425–426. doi: 10.1038/213425a0. [DOI] [PubMed] [Google Scholar]