Salmonella transmission from the gilt to her offspring

Parada, Julián; Carranza, Alicia; Pichel, Mariana; Tamiozzo, Pablo; Pelliza, Bibiana R.; Ambrogi, Arnaldo

doi:10.1016/j.livsci.2013.09.010

Cited by 4 publications

(4 citation statements)

References 30 publications

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“…The main serovars identified in this study differed from previous reports in the country [6, 17] and in the region [18], and from those found in a European survey [2]. All those studies reported the isolation of a large number of serovars, in contrast to our results in which S. Typhimurium and S. Derby where the most prevalent serotypes.…”

Section: Discussioncontrasting

confidence: 99%

“…However, the prevalence of Salmonella shedding pigs on farm is often lower, with an average of 6·6% [4]. In Argentina as well as in other South American countries little is known about the regional prevalence of Salmonella in pig herds [5, 6]. Nevertheless, both human sporadic cases and larger Salmonella foodborne outbreaks have been reported in the region [7].…”

Section: Introductionmentioning

confidence: 99%

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Spatial distribution and risk factors associated withSalmonella entericain pigs

et al. 2016

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The importance of pork in the transmission of Salmonella spp. to humans has led to the development of control programmes worldwide. For this, knowledge on the epidemiology of the infection in the production system is fundamental to the efficacy of the regulations. Our objective was to determine the prevalence and spatial distribution of Salmonella-infected farms in the central region of Argentina, and to identify the predominant serotypes and epidemiological factors associated with an increased risk of infection. Salmonella was isolated from 22 of 52 sampled farms, for a farm prevalence of 42·3% (95% confidence interval 28·4-56·1). The most frequent serotypes isolated were S. Typhimurium and S. Derby, which have often been considered of public health concern in the region. Limited evidences of global and local clustering in the region under study were found, and the type of feed and presence of diarrhoeic pigs were significantly associated with having Salmonella shedders in the farm. This highlights the need to evaluate microbiological controls at the farm level, and demonstrates the usefulness of the spatial tools to identify areas of greatest risk when processing pork at slaughterhouse, which could contribute to increasing the food safety of pork products.

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Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial distribution and risk factors associated withSalmonella entericain pigs

et al. 2016

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“…The abundance of published reports on infection patterns, risk factors and control strategies in finishers (Hurd, McKean, Griffith, & Rostagno, ; Pires, Funk, & Bolin, ; Walia et al., ) contrasts with the relative dearth of published data on the role of sows in the transmission of Salmonella . Although some studies have examined the pattern of Salmonella infection in sows (Magistrali et al., ; Nollet et al., ,; Parada et al., ), there is some dispute as to whether vertical transmission, defined as transmission from the sow to the offspring after birth, is an important means of propagating infection (Davies, Funk, & Morrow, ). A number of studies concluded that such transmission does not constitute the primary source of Salmonella in finishers (Berends, Urlings, Snijders, & Van Knapen, ; Funk, Davies, & Nichols, ).…”

Section: Introductionmentioning

confidence: 99%

Salmonella in breeding pigs: Shedding pattern, transmission of infection and the role of environmental contamination in Irish commercial farrow‐to‐finish herds

Lynch

Walia

Leonard

et al. 2017

Zoonoses and Public Health

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SummaryThis study aimed to provide new insights into the epidemiology of Salmonella in pig production, focusing on potential shedding patterns in breeding pigs throughout a full production cycle and the risk of transmission of infection from the sow to her offspring. A longitudinal study was conducted on five farrow-to-finish commercial pig farms. In each herd, shedding of Salmonella in faeces was monitored in breeders through service, gestation and lactation. Swabs of the farrowing room floor and pools of faeces from piglets were collected on two occasions during lactation. Environmental pen swabs were also taken in the weaning and finisher houses. Salmonella isolates were serotyped, tested for antimicrobial resistance (AMR) and typed by Multiple-Locus Variable number tandem repeat Analysis (MLVA). Shedding by breeding pigs was low in all stages of the production cycle; 5% of sows shed at service, the production stage with highest risk of shedding (p < .01), 1.6% shed during gestation and 2.5% after farrowing. Salmonella was detected in 4% of piglet faecal pools in the second week postfarrowing and 5% in the fourth week. Serotyping and AMR profiles of Salmonella isolates revealed that strains in sows and gilts were mostly different from strains isolated in weaner and finisher facilities. MLVA typing confirmed that the source of infection in piglets was in most instances the contaminated environment rather than their dam. Based on the typing results, it appears that sows do not pose a major risk in the maintenance and transmission of Salmonella to their progeny but instead the contaminated pen environment is more significant in the perpetuation of the organism on farm. K E Y W O R D SBreeding sows, Environmental contamination, Pigs, Salmonella

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“…El estudio de los perfiles genéticos o pulsotipos por PFGE-XbaI permitió identificar una gran diversidad de subtipos genéticos entre las serovariedades de Salmonella analizadas.En total se obtuvieron 30 perfiles genéticos diferentes entre los 101 aislamientos de Salmonella de granjas y frigoríficos. En granjas, los subtipos genéticos de S.Typhimurium que circularon en la etapa M6 difirieron de aquellos en cerdos de M8, coincidiendo con otros autores que encontraron en esas categorías distintos subtipos genéticos, en su caso, de otra serovariedad, S. Schwarzengrund, sugiriendo diferentes fuentes de infección(Parada et al, 2013).Las cepas de Salmonella aisladas de cerdos en frigoríficos presentaron mayor variabilidad de pulsotipos que los hallados en granjas, posiblemente debido a que las contraen principalmente en los corrales de espera antes de la faena. Allí el hacinamiento de animales provenientes de diferentes granjas los expone al medio contaminado con MF que sumado al tiempo de espera y a la alta capacidad de sobrevivencia de Salmonella en el ambiente, contribuye al contacto e infección.…”

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Salmonella en cerdos: serovariedades y aspectos de la resistencia antimicrobiana relacionados con la salud pública en cepas aisladas en granjas y en animales faenados

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Los objetivos de este estudio fueron determinar la prevalencia de Salmonella y sus serovariedades en 10 granjas y 4 frigoríficos de cerdos en las provincias de Buenos Aires y Santa Fe (Argentina), evaluar sus perfiles de resistencia antimicrobiana, determinar los perfiles genéticos circulantes en cerdos y relacionarlos con casos de salmonelosis humanos. La marcha bacteriológica se realizó según las normas FDA/BAM/AOAC y la serotipificación se realizó de acuerdo al esquema de Kauffmman-White, en el Instituto INEI-ANLIS “Dr. Carlos G. Malbran”. En granjas, a partir de un total de 200 muestras de materia fecal del piso se aislaron 8 (4%) cepas de Salmonella spp., se identificaron 4 serovariedades diferentes: S. Typhimurium, S. Agona, S. Tennessee y S. Seftenberg. En frigoríficos, de un total de 386 muestras, se identificaron 93 (24%) cepas de Salmonella spp., 52 (56%) de contenido cecal y 41 (44%) de linfonódulo ileocecal; se identificaron 15 serovariedades diferentes. Las 6 más prevalentes fueron S. Schwarzengrund, S. Heidelberg, S. subsp I (6,8:e,h:-), S. Derby, S. Bredeney y S. Typhimurium. Se probaron 15 antimicrobianos por el método de difusión y dilución en agar según las normas del CLSI: amikacina, gentamicina, ciprofloxacina, cefalotina, cefotaxima, enrofloxacina, fosfomicina, polimixina-B, tetraciclina, cloranfenicol, estreptomicina, trimetoprima-sulfametoxazole, ampicilina, nitrofurantoína y ácido nalidíxico. En granjas y frigoríficos se destacó la resistencia a tetraciclina (30%) y ampicilina (22%). En cerdos de faena hubo 25 (27%) cepas de Salmonella multirresistentes, S. Heidelberg, S. Typhimurium, S. Derby y S. Orion. Los mayores porcentajes de resistencia coinciden con los antimicrobianos más utilizados en granjas. Los resultados del PFGE-XbaI determinaron 30 perfiles diferentes. Sin embargo, no se estableció correlación entre resistencia antimicrobiana y perfil genético. Se encontró el mismo subtipo genético de S. Typhimurium, S. Agona, S. Newport, S. Bredeney, S. Infantis, S. Derby, S. Anatum y S. Adelaide, circulando en cerdos y casos de salmonelosis en humanos.

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Salmonella transmission from the gilt to her offspring

Cited by 4 publications

References 30 publications

Spatial distribution and risk factors associated withSalmonella entericain pigs

Spatial distribution and risk factors associated withSalmonella entericain pigs

Salmonella in breeding pigs: Shedding pattern, transmission of infection and the role of environmental contamination in Irish commercial farrow‐to‐finish herds

Salmonella en cerdos: serovariedades y aspectos de la resistencia antimicrobiana relacionados con la salud pública en cepas aisladas en granjas y en animales faenados

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