Effect of faecal extract on the growth ofsalmonella enteritidisin artificially contaminated hens’ eggs

Abstract

1. Salmonella enteritidis PT 4 grew in eggs stored at 25 degrees C, but not at 10 degrees C. 2. The incidence of generalised infection of the egg contents (greater than 10(6) salmonellas/ml) was greater in eggs inoculated with cells suspended in faecal extract compared to those with cells in Ringer's solution. 3. The removal of most of the iron did not decrease the growth-promoting effect of the faecal extract.

The chicken, the egg and Salmonella enteritidis

“…However, it can be difficult to isolate S. enteritidis from hen houses, even when a flock is producing contaminated eggs (Henzler et al ., 1994; Caldwell et al ., 1995; Davies and Wray, 1996a; Riemann et al ., 1998; Fuzihara et al ., 2000). Inhibiting the growth and survival of S. enteritidis in the hen house is an emerging area of research that may aid control (Clay and Board, 1992; Guard‐Petter, 1997; Himathongkham et al ., 1999; Mattick et al ., 2000).…”