Serological and bacteriological observations on experimental infection with Salmonella hadar in chickens

Desmidt, Maria

doi:10.1016/s0378-1135(98)00154-0

Cited by 30 publications

(20 citation statements)

References 15 publications

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“…In some experimental infections with other Salmonella types in young broilers a recovery in approximately 30 days was observed [18,19]. In other inoculation experiments it is seen that inoculated chickens housed in groups shed for longer than do individually housed chickens, probably due to continuous re-infection [20].…”

Section: Discussionmentioning

confidence: 93%

Transmission of Salmonella between broiler chickens fed with fermented liquid feed

Heres¹,

Urlings²,

Wagenaar³

et al. 2004

Epidemiol. Infect.

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SUMMARYIn the light of food safety and the control of Salmonella at chicken farms, fermented liquid feed (FLF) was studied. This moistened feed reduced the susceptibility of chickens for Salmonella. To assess the effect of the fermented feed on the transmission of Salmonella between chickens, a transmission experiment was performed. Salmonella shedding was followed within groups of two susceptible chickens together with two previously inoculated chickens. The between-chicken transmission was quantified by calculating a reproduction ratio (R 0 ) and a transmission rate parameter (b). R 0 and b in the FLF-treated groups were reduced, but a typical infectious chicken fed with FLF, could on average still infect more than one new infectious case. FLF can therefore reduce the transmission of Salmonella in chicken flocks, but it will not prevent the occurrence of major outbreaks.

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Section: Discussionmentioning

confidence: 93%

Transmission of Salmonella between broiler chickens fed with fermented liquid feed

Heres¹,

Urlings²,

Wagenaar³

et al. 2004

Epidemiol. Infect.

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“…This age related difference in susceptibility to non-typhoid is observed with many different serovars. Experimental infection of day-old chicks and 4 weeks old chickens with Salmonella Hadar, however, lead to similar excretion patterns (Desmidt et al, 1998a).…”

Section: Laying Hens and Eggs For Human Consumptionmentioning

confidence: 97%

“…In the chronic stage retarded growth of some birds is usually the only obvious sequel (Desmidt et al, 1998a). Many nontyphoid serovars do not seem to cause any clinical signs under any condition.…”

Section: Laying Hens and Eggs For Human Consumptionmentioning

confidence: 99%

“…The above mentioned clinical signs and mortality have been reported only for a limited number of serovars, including among others: Enteritidis (Desmidt et al, 1997), Typhimurium (Barrow et al, 1987a;Bumstead and Barrow, 1988), Hadar (Desmidt et al, 1998a), Heidelberg (Roy et al, 2001). The occurrence and severity of clinical signs is not only serovar dependent, but also strain dependent.…”

Section: Laying Hens and Eggs For Human Consumptionmentioning

confidence: 99%

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Opinion of the Scientific Panel on biological hazards (BIOHAZ) related to the use of vaccines for the control of Salmonella in poultry

2004

EFSA Journal

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“…BPW cultures were diluted tenfold in BPW at 0.1% to 10 -3 and then plated in duplicate XLD agar (adapted from Desmidt et al, 1998 …”

Section: Bacterial Isolation and Identificationmentioning

confidence: 99%

Salmonella fecal excretion control in broiler chickens by organic acids and essential oils blend feed added

Borsoi

Santos

Diniz

et al. 2011

Rev. Bras. Cienc. Avic.

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Salmonellosis is an important disease with economic impact as it may affect animal performance and may result in foodborne disease in humans through the eggs and carcass contamination. Regarding the Salmonella control, it is possible to decrease its fecal excretion and the contamination of chicken carcasses by adding organic acids to the feed or drinking water at appropriate times. The aim of this study was to test a blend of organic acids and essential oils in broilers challenged with Salmonella Enteritidis (SE), and to verify the fecal excretion of Salmonella. Sixty broilers were placed in four groups. One group was the negative control. Another group was orally inoculated at 1 day-old with 10 5 CFU/mL of SE as a positive SE control. Two groups (T3 and T4) were orally inoculated at 1 day-old with 10 5 CFU/mL of SE and their feed was separately treated with 0.5 and 1% of organic acids and essential oils, respectively. To assess the fecal excretion of SE, cloacal swabs were collected from all birds at 2, 6, 13 and 20 days after inoculation. The T3 and T4 groups showed a reduction in fecal excretion of SE at 6 and 20 days after inoculation.

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Serological and bacteriological observations on experimental infection with Salmonella hadar in chickens

Cited by 30 publications

References 15 publications

Transmission of Salmonella between broiler chickens fed with fermented liquid feed

Transmission of Salmonella between broiler chickens fed with fermented liquid feed

Opinion of the Scientific Panel on biological hazards (BIOHAZ) related to the use of vaccines for the control of Salmonella in poultry

Salmonella fecal excretion control in broiler chickens by organic acids and essential oils blend feed added

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