Preface

Pattison, Mark; McMullin, Paul; Bradbury, Janet M.; Alexander, D. J.

doi:10.1016/b978-0-7020-2862-5.50004-0

Cited by 38 publications

(61 citation statements)

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“…Our results from the tests in chickens and turkeys differ from data obtained in the USA, Canada, Israel (12,(16)(17) showing predominance of the infection in turkeys and at a lesser extent, in chickens and the occurrence in turkeys only in Italy and France (16). We proved the presence of antibodies in broiler chickens and negative results in turkeys regardless of the rearing technology.…”

Section: Discussioncontrasting

confidence: 54%

Prevalence of avian paramyxovirus-2 among domestic fowl species in Bulgaria in 2013 and 2014

Zarkov¹

2016

TJS

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The haemagglutination inhibition (HI) test is used for testing 1258 blood sera from four avian species (hens and broilers, turkeys, partridges and geese) for detection of post infection antibodies against avian paramyxovirus -2 (АРМV-2). The samples were collected from 14 regions in Bulgaria from fowl reared in 27 farms (commercial laying hens, commercial broilers, commercial laying turkeys and game breeding station with partridges) -15, 9, 2, 1 samples, respectively. Another 11 samples were obtained from backyard poultry (laying hens, laying turkeys, laying geeses) -8, 2, 1 birds respectively. Positive results from tests were established in sera from backyard geese, from commercial broilers, commercial laying hens, and partridges (75%, 12.96 %, 7.81 % and 5.17 % respectively). In studied farms with hens and broiler chickens, positive samples from broilers predominated (88.89 %), while the prevalence on laying hen farms was 66.67 %. Positive samples were detected in 10 (71.43 %) out of the 14 surveyed regions. Antibody titres varied from 1:4 (log 2 2) in hens, broilers and geese, 1:16 (log 2 4) in partridges and attained 1:32 (log 2 5) in broilers, 1:64 (log 2 6) in geese and partridges and 1:128 (log 2 7) in laying hens. Among geese and partridges, samples with titres 1:16 (log 2 4) were predominating -60 % and 66.67 %, followed by broilers with titres 1:8 (log 2 3) -37 % and hens with titres 1:4 (log 2 2) -47 %.

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Section: Discussioncontrasting

confidence: 54%

Prevalence of avian paramyxovirus-2 among domestic fowl species in Bulgaria in 2013 and 2014

Zarkov¹

2016

TJS

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“…Salmonellosis is caused by bacterium of the genera Salmonella, this infection is common in two weeks old chicks and ducklings, Salmonella gastroenteritis of human have been associated with consumption of infected birds, hence the infection of birds with Salmonella has been attributed to contaminated feeds [12]. Isolation of E. coli a coliform is an indication of feacal material contamination which can be associated with poor hygiene.…”

Section: Discussionmentioning

confidence: 99%

Microbial Analysis of Poultry Feeds Produced in Songhai Farms, Rivers State, Nigeria

Matthew¹

2017

JMEN

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“…In the field it is more likely that exposure to Salmonella serovars is at a low level and moves gradually through the bird population 19. Some birds will be initially colonised for short periods, but will serve as a source of infection for other, as yet unexposed, birds in the flock.…”

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Live and inactivated vaccine regimens against caecal Salmonella Typhimurium colonisation in laying hens

et al. 2016

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ObjectiveIn Australia, Salmonella serovar Typhimurium (S. Typhimurium) is the predominant zoonotic serovar in humans and is frequently isolated from layer hens. Vaccination against this serovar has been previously shown to be effective in broilers and the aim of this current study was to assess and determine the best vaccination strategy (live or inactivated) to minimise caecal colonisation by S. Typhimurium.MethodsA long‐term experiment (56 weeks) was conducted on ISABROWN pullets using a commercial live aroA deleted mutant S. Typhimurium vaccine and an autogenous inactivated multivalent Salmonella vaccine (containing serovars Typhimurium, Infantis, Montevideo and Zanzibar). These vaccines were administered PO or by SC or IM injection, either alone or in combination. Pullets were vaccinated throughout rearing (to 18 weeks of age) and sequentially bled for antibody titre levels. The birds, vaccinated and controls, were challenged orally with a field isolate of S. Typhimurium at different ages, held for 21 days post‐challenge, then euthanased and their caeca cultured for the presence of Salmonella. ResultsNone of the oral live‐vaccinated groups exhibited lasting protection. When administered twice, the inactivated vaccine gave significant protection at 17 weeks of age and the live vaccine given by SC injection given twice produced significant protection at 17, 25 and 34 weeks.ConclusionsVaccination regimens that included parenteral administration of live or inactivated vaccines and thus achieved positive serum antibody levels were able to provide protection against challenge. Hence, vaccination may play a useful role in a management strategy for Salmonella carriage in layer flocks.

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Preface

Cited by 38 publications

References 0 publications

Prevalence of avian paramyxovirus-2 among domestic fowl species in Bulgaria in 2013 and 2014

Prevalence of avian paramyxovirus-2 among domestic fowl species in Bulgaria in 2013 and 2014

Microbial Analysis of Poultry Feeds Produced in Songhai Farms, Rivers State, Nigeria

Live and inactivated vaccine regimens against caecal Salmonella Typhimurium colonisation in laying hens

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