Fate of mesophilic aerobic bacteria and Salmonella enterica on the surface of eggs as affected by chicken feces, storage temperature, and relative humidity

Sunhyung Park, Seonyeong Choi, Hoikyung Kim, Yoonsook Kim, Byeong sam Kim, Larry R. Beuchat, Jee-Hoon Ryu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We compared the microbiological quality of chicken eggshells obtained from a traditional wholesale market and a modern supermarket. We also determined the survival and growth characteristics of naturally occurring mesophilic aerobic bacteria (MAB) and artificially inoculated Salmonella enterica on eggshells under various environmental conditions (presence of chicken feces, temperature [4, 12, or 25°C], and relative humidity [RH; 43 or 85%]). The populations of MAB, coliforms, and molds and yeasts on eggshells purchased from a traditional wholesale market were significantly (P≤0.05) higher than those from a modern supermarket. In the second study, when we stored uninoculated eggs under various storage conditions, the population of MAB on eggshells (4.7-4.9 log CFU/egg) remained constant for 21 days, regardless of storage conditions. However, when eggshells were inoculated with S.enterica and stored under the same conditions, populations of the pathogen decreased significantly (P≤0.05) under all tested conditions. Survival of S.enterica increased significantly (P≤0.05) in the presence of feces, at low temperatures, and at low RH. These observations will be of value when predicting the behavior of microorganisms on eggshells and selecting storage conditions that reduce the populations of S. enterica on eggshells during distribution.

Original languageEnglish
Pages (from-to)200-205
Number of pages6
JournalFood Microbiology
Volume48
DOIs
Publication statusPublished - 2015 Jun 1

Fingerprint

Egg Shell
Aerobic Bacteria
Salmonella enterica
eggs
egg shell
Humidity
Feces
storage temperature
Eggs
Chickens
relative humidity
feces
chickens
Temperature
bacteria
storage conditions
wholesale marketing
supermarkets
Population
coliform bacteria

Keywords

  • Chicken feces
  • Eggshells
  • Relative humidity
  • Salmonella enterica
  • Temperature

ASJC Scopus subject areas

  • Food Science
  • Microbiology

Cite this

Fate of mesophilic aerobic bacteria and Salmonella enterica on the surface of eggs as affected by chicken feces, storage temperature, and relative humidity. / Park, Sunhyung; Choi, Seonyeong; Kim, Hoikyung; Kim, Yoonsook; Kim, Byeong sam; Beuchat, Larry R.; Ryu, Jee-Hoon.

In: Food Microbiology, Vol. 48, 01.06.2015, p. 200-205.

Research output: Contribution to journalArticle

Park, Sunhyung ; Choi, Seonyeong ; Kim, Hoikyung ; Kim, Yoonsook ; Kim, Byeong sam ; Beuchat, Larry R. ; Ryu, Jee-Hoon. / Fate of mesophilic aerobic bacteria and Salmonella enterica on the surface of eggs as affected by chicken feces, storage temperature, and relative humidity. In: Food Microbiology. 2015 ; Vol. 48. pp. 200-205.
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