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Bacterial flora of spices and its control by gamma irradiation

Journal Article:

Abstract

The bacterial contamination was tested in 26 samples of spices. Chili, allspice and paprika were the most contaminated spices by bacteria. Five bacterial genera were isolated, namely bacillus, staphylococcus, streptococcus, micrococcus, and coccobacillus, all being gram-positive. Most isolates have been related to the genus bacillus. The bacterial isolates were identified as B. alvei, B. circulans, B. megaterium, B. pasteurii, B. pumilus, B. thuringiensis, B. sphaericus, B. incertaesedis, Micrococcus luteus, staphylococcus aureus, streptococcus sp. and coccobacillus sp. Irradiation of spices led to a significant decrease in the bacterial count of all samples. The dose required to inhibit completely the natural bacterial flora was 25 KGY. The most radioresistant isolates were staphylococcus aureus and micrococcus luteus which were subjected to sublethal doses of 15 and 20 KGY respectively. The dose response curves of the 2 most radioresistant isolates showed simple exponential relationship. The D 10-value of S. aureus and M. luteus were 0.9 and 1.1 KGY, respectively. The effect of storage period on the bacterial load of, as well as, the antibacterial activity of the tested spices were investigated.
Publication Date:
Jan 01, 1985
Product Type:
Journal Article
Reference Number:
AIX-20-029448; EDB-89-057654
Resource Relation:
Journal Name: Egypt. J. Radiat. Sci. Appl.; (Egypt); Journal Volume: 2:1
Subject:
60 APPLIED LIFE SCIENCES; SPICES; RADIOSTERILIZATION; RADURIZATION; BACILLUS; DOSE-RESPONSE RELATIONSHIPS; MICROCOCCUS; PEPPERS; RADIOSENSITIVITY; STAPHYLOCOCCUS; STREPTOCOCCUS; SUBLETHAL IRRADIATION; SURVIVAL CURVES; BACTERIA; FOOD; IRRADIATION; MICROORGANISMS; PLANTS; STERILIZATION; VEGETABLES; 553004* - Agriculture & Food Technology- Food Protection & Preservation- (1987-)
OSTI ID:
6323950
Research Organizations:
National Centre for Radiation Research and Technology, Cairo (Egypt)
Country of Origin:
Egypt
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: EJRAE
Submitting Site:
INIS
Size:
Pages: 57-68
Announcement Date:
May 01, 1985

Journal Article:

Citation Formats

El-Zawahry, Y A, Youssef, Y A, Awny, N M, and Hussein, H A. Bacterial flora of spices and its control by gamma irradiation. Egypt: N. p., 1985. Web.
El-Zawahry, Y A, Youssef, Y A, Awny, N M, & Hussein, H A. Bacterial flora of spices and its control by gamma irradiation. Egypt.
El-Zawahry, Y A, Youssef, Y A, Awny, N M, and Hussein, H A. 1985. "Bacterial flora of spices and its control by gamma irradiation." Egypt.
@misc{etde_6323950,
title = {Bacterial flora of spices and its control by gamma irradiation}
author = {El-Zawahry, Y A, Youssef, Y A, Awny, N M, and Hussein, H A}
abstractNote = {The bacterial contamination was tested in 26 samples of spices. Chili, allspice and paprika were the most contaminated spices by bacteria. Five bacterial genera were isolated, namely bacillus, staphylococcus, streptococcus, micrococcus, and coccobacillus, all being gram-positive. Most isolates have been related to the genus bacillus. The bacterial isolates were identified as B. alvei, B. circulans, B. megaterium, B. pasteurii, B. pumilus, B. thuringiensis, B. sphaericus, B. incertaesedis, Micrococcus luteus, staphylococcus aureus, streptococcus sp. and coccobacillus sp. Irradiation of spices led to a significant decrease in the bacterial count of all samples. The dose required to inhibit completely the natural bacterial flora was 25 KGY. The most radioresistant isolates were staphylococcus aureus and micrococcus luteus which were subjected to sublethal doses of 15 and 20 KGY respectively. The dose response curves of the 2 most radioresistant isolates showed simple exponential relationship. The D 10-value of S. aureus and M. luteus were 0.9 and 1.1 KGY, respectively. The effect of storage period on the bacterial load of, as well as, the antibacterial activity of the tested spices were investigated.}
journal = {Egypt. J. Radiat. Sci. Appl.; (Egypt)}
volume = {2:1}
journal type = {AC}
place = {Egypt}
year = {1985}
month = {Jan}
}