Salmonella Typhimurium and Salmonella Sofia: Growth in and Persistence on Eggs under Production and Retail Conditions

Table 4

Survival on egg shells during storage at 4 and 22°C.

Time (weeks)	4°C (/cm^2)^1		22°C (/cm^2)
	SS^2	STM^3	SS	STM
0	3.89^aA	3.39^abA	3.55^abA	2.88^bA
1	1.52^aB	<−0.05^bB	0.56^bB	0.25^bB
2	0.48^aC	<−0.05^aB	0.10^aB	<−0.05^aB
4	<−0.05^aC	<−0.05^aB	<−0.05^aB	<−0.05^aB

Different lower case letters within rows are significantly different and different upper case letters within columns are significantly different ().
Mean MPN/cm² of five eggs at each sampling time.
²SS: S. Sofia 1296a; ³STM: S. Typhimurium PT135.