Some Factors Affecting Salmonella typhimurium Infection and Shedding in Chickens Raised on Litter

Rigby, C E; Pettit, J. R.

doi:10.2307/1589575

Cited by 21 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is evidence that S. Enteritidis spreads rapidly from infected day old chicks to pen mates reared on litter 78,81 . Poultry may also get infected from feed 43,66 , water 36 , rodents 4,17,40 , or by contact with other poults or chicks.…”

Section: Horizontal Infection Of S Enteritidis In Poultrymentioning

confidence: 99%

Salmonella enterica serovar Enteritidis: a Mini-review of Contamination Routes and Limitations to Effective Control

Omwandho

Kubota

2010

JARQ

View full text Add to dashboard Cite

Salmonellosis is associated with massive public health and economic losses globally. It is estimated to cost poultry farmers in the United States of America up to US$114 million annually. Attempts to develop effective vaccines and eradicate Salmonella enterica serovar Enteritidis (S. Enteritidis) from hen houses are undermined by serious limitations. This article reviews documented contamination routes and limitations to the rapid development of vaccines. Host-parasite interactions and clinical pathology are discussed and methods for reducing S. Enteritidis infection and transmission suggested.

show abstract

Section: Horizontal Infection Of S Enteritidis In Poultrymentioning

confidence: 99%

Salmonella enterica serovar Enteritidis: a Mini-review of Contamination Routes and Limitations to Effective Control

Omwandho

Kubota

2010

JARQ

View full text Add to dashboard Cite

show abstract

“…Reused litter has been found to harbor fewer yeasts, molds, coliform bacteria and Salmonella compared to fresh litter [ 9 , 10 ]. However, fecal shedding of food-borne pathogens such as Salmonella into PL by colonized birds can also be a source of new infection or re-inoculation [ 11 ]. Salmonella enterica subsp.…”

Section: Introductionmentioning

confidence: 99%

Hotspot mutations and ColE1 plasmids contribute to the fitness of Salmonella Heidelberg in poultry litter

et al. 2018

View full text Add to dashboard Cite

Salmonella enterica subsp. enterica serovar Heidelberg (S. Heidelberg) is a clinically-important serovar linked to food-borne illness, and commonly isolated from poultry. Investigations of a large, multistate outbreak in the USA in 2013 identified poultry litter (PL) as an important extra-intestinal environment that may have selected for specific S. Heidelberg strains. Poultry litter is a mixture of bedding materials and chicken excreta that contains chicken gastrointestinal (GI) bacteria, undigested feed, feathers, and other materials of chicken origin. In this study, we performed a series of controlled laboratory experiments which assessed the microevolution of two S. Heidelberg strains (SH-2813 and SH-116) in PL previously used to raise 3 flocks of broiler chickens. The strains are closely related at the chromosome level, differing from the reference genome by 109 and 89 single nucleotide polymorphisms/InDels, respectively. Whole genome sequencing was performed on 86 isolates recovered after 0, 1, 7 and 14 days of microevolution in PL. Only strains carrying an IncX1 (37kb), 2 ColE1 (4 and 6kb) and 1 ColpVC (2kb) plasmids survived more than 7 days in PL. Competition experiments showed that carriage of these plasmids was associated with increased fitness. This increased fitness was associated with an increased copy number of IncX1 and ColE1 plasmids. Further, all Col plasmid-bearing strains had hotspot mutations in 37 loci on the chromosome and in 3 loci on the IncX1 plasmid. Additionally, we observed a decrease in susceptibility to tobramycin, kanamycin, gentamicin, neomycin and fosfomycin for Col plasmid-bearing strains. Our study demonstrates how positive selection from poultry litter can change the evolutionary path of S. Heidelberg.

show abstract

“…In blind gut of control day-old chicks the celullolytic bacteria number was not more than 7½10 5 , being in the group II and III almost 1000 times higher. In duodenum it was 100 times higher on average compared to control.…”

Section: Dynamics Of Total Bacterial Number (Genomes/g) In the Gastromentioning

confidence: 79%

“…gens' proliferation in the host's body (4)(5)(6). Influencing fodder digestibility and the digestive tract development in poultry, the microflora affects significantly on the nutrients absorption, nutritional demands, physiological status and growth (7).…”

mentioning

confidence: 99%

Gut Microbiota of Broiler Chickens Influenced by Probiotics and Antibiotics as Revealed by T-RFLP and Rt-PCR

Grozina¹

2014

S-h. biol.

View full text Add to dashboard Cite

A b s t r a c tIn poultry, and birds in general, the gut is not only the first line of the defense from exogenous pathogens, but also the biggest immunity organ. The microflora inhabiting blind gut plays multifunctional role in the maintenance of homeostasis in macroorganism, being involved in different processes including fodder digestion. Probiotic, antibiotic, prebiotic, symbiotic preparations, enzymes, etc., affecting directly or ndirectly the gut microflora, can thus increase daily weigh growth and viability in chickens, and the slaughter yield. They also improve a digestibility of fodder nutrients, quality and sanitary condition of the birds. However, the influence of these agents on gut microflora in chickens is still not cleared up. Recent molecular approaches allow studying microbial biodiversity without traditional limitations we are faced with when applying microbiological techniques. By T-RFLP and RT-PCR, the composition and growth dynamics of gut microflora were examined in the Cobb 500 broiler chickens fed with probiotic Cellobacterin-T and antibiotic Stafak-110 as feed additives to the complete diet. By these methods, the probiotic and antibiotic additives were shown to contribute to the development of microbiota. In particular they increased the total number of bacteria, what is more, the normal gastrointestinal flora, i.e. cellulolytic bacteria, lactobacilli, bifidobacteria, bacilli, selenomonas species, increased, while the unwanted enterobateria and actinimycetes decreased. In case we used the probiotics in poultry diet when compared to antibiotics, in the studied parts of the intestinal of broiler chickens there were more cellulolytic bacteria, and in the blind gut the number of lactobacilli, bifidobacteria and bacilli was 10-100 times higher, while clostridia and transit bacteria number decreased. Numerous investigations affirmed the effectiveness of probiotics in poultry basing on zootechnical parameters, however, only molecular identification of the gut microbiota members by means of T-RFLP-PCR and RT-PCR analysis allows detecting and attributing their taxonomic groups influenced by a specific feed additive for further justification of its rational use.

show abstract

Some Factors Affecting Salmonella typhimurium Infection and Shedding in Chickens Raised on Litter

Cited by 21 publications

References 23 publications

Salmonella enterica serovar Enteritidis: a Mini-review of Contamination Routes and Limitations to Effective Control

Salmonella enterica serovar Enteritidis: a Mini-review of Contamination Routes and Limitations to Effective Control

Hotspot mutations and ColE1 plasmids contribute to the fitness of Salmonella Heidelberg in poultry litter

Gut Microbiota of Broiler Chickens Influenced by Probiotics and Antibiotics as Revealed by T-RFLP and Rt-PCR

Contact Info

Product

Resources

About