Section 10
Chapter 9,378

Salmonella enteritidis penetration in fertile and infertile chicken eggs at progressive stages of incubation

Garcia Espinosa, G.; Rosales Nieves, Z.; Tellez Isaias, G.; Sanchez Ramirez, E.; Hargis, B.

Veterinaria - Mexico 27(4): 285-288


Accession: 009377487

The penetration of Salmonella enteridis, phage type 13, experimentally inoculated in the egg shell on fertile and infertile eggs from 59 week old Babcock B-300 hens, free of Salmonella spp was evaluated. The study was carried out on days 8, 12 and 16 of incubation. Penetration into three areas of the outer egg structures was studied after 24 hours incubation at 37.7 degree C. There were no significant differences between fertile and infertile eggs in all the areas tested (P gt 0.05) on day of incubation 8, however, it was significantly that fewer of the fertile eggs were penetrated (P lt 0.05) on days 12 and 16 of incubation, indicating that embryonic development renders considerably less susceptibility to Salmonella invasion in eggs. Penetration through the shell was rather similar in both fertile and infertile eggs, in contrast to the marked differences observed in the deeper outer egg structures. Results indicate that fresh infertile hatching eggs may be considerable more susceptible to Salmonella penetration than those under-going embryonic development.

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