Use of a peroxidase-catalyzed compound and ultraviolet radiation as an egg shell sanitizer /
A peroxidase-catalyzed compound (PCC) ('Enzodine, Symbollon Corporation, Sudbury MA 01776) and ultraviolet (UV) were tested to determine their potential for used as egg shell sanitizers. A primary poultry isolate of S. typhimurium was used to evaluate the biocidal activity of PCC and UV on egg...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=739363441&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | A peroxidase-catalyzed compound (PCC) ('Enzodine, Symbollon Corporation, Sudbury MA 01776) and ultraviolet (UV) were tested to determine their potential for used as egg shell sanitizers. A primary poultry isolate of S. typhimurium was used to evaluate the biocidal activity of PCC and UV on egg shells. Initial Salmonella levels were significantly decreased by deionized-distilled water (DDW) and PCC dipping. Salmonella isolated following PCC dip were significantly lower than those from DDW dip (P<.05). Aerobic counts were also significantly reduced by PCC dipping (P<.Ol). Comparison of PCC dip with 200 ppm chlorine (CL) and formaldehyde fumigation indicated that PCC dip was as effective as these two sanitizers. Hatchability and embryonic mortality were not affected by dipping treatments. Control compared to DDW and PCC dip did not show significant differences on egg weight loss during incubation. No significant differences in chick mortality and feed consumption among dipping treatments were found. These results indicated that PCC dipping can be used to reduce bacterial contamination on egg shells without alteration of hatchability, egg weight and chick quality. In the UV study, the initial Salmonella levels inoculated on Brilliant Green agar were significantly decreased after 1 minute of UV treatment (P<.Ol) . Further investigation found that 15 seconds of UV radiation could significantly reduce Salmonella levels (P<.Ol). Salmonella levels inoculated on egg shell surfaces were also significantly decreased after 1 minute of UV treatment (P<.Ol). The results of mold counts were either 0 or I CFU for all the UV treatments and 99% of the aerobic microbes were eliminated by all the UV treatments. The combination of higher LTV intensity (4350 pW/cm2) and rotating the egg at 1 revolution/min significantly reduced the aerobic counts in 15 minutes (P<.Ol) . Comparison of UV radiation with CL, formaldehyde fumigation and a commercial quaternary ammonium sanitizer showed that UV had higher aerobic counts (P<.05). However, UV radiation was as effective as others in decreasing mold populations. These results showed that UV radiation can significantly reduce Salmonella, aerobic and mold populations from egg shell surfaces. |
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| Item Description: | Vita. "Major Subject: Poultry Science". |
| Physical Description: | xii, 112 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages xii, 112. |