Differences among Six Salmonella Serovars in Abilities to Colonize Reproductive Organs and to Contaminate Eggs in Laying Hens

• DOI: 10.2307/1593012
• Publication Date: 2006-05-10T05:09:33Z
• Authors: Masashi Okamura; Yuka Kamijima; Tadashi Miyamoto; Hiroyuki Tani; Kazumi Sasai; Eiichiroh Baba
• Keywords: Salmonella enteritidis; Oviduct; Cloaca; Cecum

The abilities of Salmonella serovars to colonize the reproductive organs chickens and contaminate eggs were compared. Mature laying hens inoculated intravenously with 10(5) colony-forming units enteritidis, typhimurium, infantis, hadar, heidelberg, or montevideo cause systemic infection. enteritidis was recovered from three yolks laid (7.0%), suggesting egg contamination transovarian transmission S. enteritidis. liver, spleen, cecum colonized by each serovar similarly at 4 7 days postinoculation (PI), whereas ovary preovulatory follicles significantly (P < 0.05) higher levels than other PI. cloaca vagina 2, 4, PI portions oviduct In addition, had been persistent in peripheral blood for These results suggest that is predominant mature among six used this study, reflecting field situatibn which outbreaks human salmonellosis caused enteritidis-contaminated recently. ability may be one reasons has increased.