EN
Two hundred and forty clean, sound, unwashed eggs originating from the same farm were used a few hours after they were laid. S. enteritidis broth culture were accordingly diluted in 0.1% peptone water, and 0.1 mL of the suspension containing 104 colony forming units (CFU) was transferred to the egg surface and spread widely on the shell. The eggs were then investigated after their storage in the refrigerator or incubator at 2°, 20° or 30°C for 0, 7,14 and 21 days. Results indicate that survival of S. enteritidis on the egg shells depends, to a great extent, on the time and temperature of storage. The organisms survived better at 2°C than at 20°C and 30°C.
PL
Badania przeprowadzono na 240 jajach, które zakupiono w jednej fermie i dostarczono do laboratorium w dniu ich zniesienia. Na każde jajo nanoszono 104 jtk (jednostek tworzących kolonie) pałeczek Salmonella enteritidis. Jaja składowano w temperaturze 2°C, 20°C i 30°C przez 0, 7,14 i 21 dni. Wykazano, że pałeczki Salmonella zamierają stopniowo na skorupkach jaj w każdej temperaturze, ale tempo zamierania jest wyraźnie szybsze w temp. 30°C lub 20°C niż 2°C.