Prevalence of Salmonella by Serological and Direct Detection Methods in Piglets from Inconspicuous, Conspicuous, and Vaccinated Sow Herds

Buch, Juhle-Marijke; Visscher, Christian; Sundern, A. Schulte zu; Schulte-Wülwer, J.; Deermann, Ansgar; Holling, Carolin

doi:10.3390/ani10010029

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…The mean of samples in the farrowing areas that were positive for Salmonella was 18.9%, with a maximum of 70% of samples positive in some farms, which is much higher than reported by Hollmann et al 2022, who in the peripartal period only found a few boot swabs positive for Salmonella [ 11 ]. Other authors also reported prevalence below 10% in three Belgian sow farms using individual fecal samples [ 22 ], similar to another study where just a low amount of environmental samples taken in 12 Salmonella -suspected identified farms were positive in culture [ 46 ]. Our data underline, that environmental sock and swab samples taken in the farrowing area can indicate shedding of sows, shedding of previously infected suckling piglets or a contaminated environment.…”

Section: Discussionsupporting

confidence: 71%

Sock and Environmental Swabs as an Efficient, Non-Invasive Tool to Assess the Salmonella Status of Sow Farms

Lillie-Jaschniski¹,

Wähner²,

Viehmann

et al. 2023

Animals

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Salmonellosis is the second most reported gastrointestinal infection in humans after campylobacteriosis and a common cause of foodborne outbreaks in the European Union (EU). In addition to consumption of contaminated animal-based foods, such as poultry, beef and eggs, pork is an important source of human salmonellosis outbreaks; therefore, Salmonella (S.) control should start in the early stages of pig production. To be able to implement effective control measures to reduce the risk of pigs being infected by Salmonella, it is important to identify the serovars circulating on farm within the different stages of production, including as early as sow and piglet breeding. The aim of the present study was to assess the Salmonella status of sow farms either producing their own finishers or delivering piglets to fattening farms with a known high serological prevalence identified within the QS Salmonella monitoring system. Overall, 97 (92.4%) of 105 investigated piglet-producing farms across Germany tested positive in at least one sample. Salmonella was detected in 38.2% of the sock and 27.1% of the environmental swab samples. S. Typhimurium was the most frequent serovar. In conclusion, sock and environmental swab samples are well suited for non-invasive Salmonella detection in different production units in farrowing farms. To establish a holistic Salmonella control program, all age classes of pig production should be sampled to enable intervention and implementation of countermeasures at an early stage if necessary.

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Section: Discussionsupporting

confidence: 71%

Sock and Environmental Swabs as an Efficient, Non-Invasive Tool to Assess the Salmonella Status of Sow Farms

Lillie-Jaschniski¹,

Wähner²,

Viehmann

et al. 2023

Animals

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“…Nevertheless, various other serotypes were also found, which indicates an infection event. Due to the vaccination on Farm A, it can therefore be assumed that more positive environmental samples are to be found as described by Buch, et al [35]. Nevertheless, they reported that vaccination alone cannot influence Salmonella prevalence on farms [35].…”

Section: Influence Of Rye and Rye Bran On Salmonella Prevalence In Gi...mentioning

confidence: 95%

“…The literature describes that the highest number of positive Salmonella samples are found in piglet rearing [26,35,44,45]. This is explained by the drop in maternal antibodies between the fourth and eighth week of life so the piglets are more susceptible to Salmonella infection [27,46].…”

Section: Influence Of Rye On Salmonella Prevalence In Piglet Rearingmentioning

confidence: 99%

Rye and Rye Bran as Components of Diets in Piglet Production—Effects on Salmonella Prevalence

Homann,

Eckey,

Chuppava

et al. 2023

Animals

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The nutritional benefits of rye (and therefore rye bran) are mainly due to its high content of fermentable dietary fiber, the non-starch polysaccharides (NSP). Microorganisms in the large intestine are able to convert these into short-chain fatty acids (SCFA), including butyrate. Butyrate strengthens the epithelial barrier function in the colon by nourishing the enterocytes and inhibiting the spread of Salmonella in the intestinal tract. Therefore, the aim of this study was to test under field conditions whether a diet with rye or rye bran as the main ingredient for gilts, sows, and weaned piglets is associated with a lower Salmonella prevalence. Depending on the age groups, between 20–30% rye or between 15–20% rye bran was used in the experimental group. A total of n = 1983 boot swabs, n = 356 fecal samples, and n = 1909 serum samples were examined. The results of this study show that rye or rye bran at the levels used had no apparent effect on the number of positive Salmonella samples. However, the Salmonella OD values in the experimental groups were significantly lower than in the control group. This suggests that the use of rye leads to a lower incidence of infection, but this effect could not be proven from swabs.

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Epidemiological Study on Salmonella Prevalence in Sow Herds Using Direct and Indirect Detection Methods

et al. 2022

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In piglet production, the beginning of pork production, Salmonella prevalence requires greater attention as having an impact on the subsequent production steps. The aim of this study was to investigate Salmonella prevalence in three sow herds with attached piglet rearing units. Salmonella prevalence was investigated either directly by boot swabs and feces or indirectly by serum samples taken during gilt integration, the peripartal period, and piglet rearing. Boot swabs and feces were analyzed by real-time PCR and subsequent microbiology. Results indicated that high biosecurity measures in sow husbandry do not necessarily result in a low Salmonella prevalence. Furthermore, the sow herds’ Salmonella prevalence should not be used to infer the situation in the associated piglet rearing. The proportion of positive boot swabs was 10.5, 3.6, and 21.3% for sows (gilts and peripartal) with an inverse situation in piglet rearing with 50.0, 63.3, and 5.8% positive swabs for farms A, B, and C, respectively. Boot swabs are suitable as a direct sampling method to gain an overview of Salmonella prevalence in both sows and piglets. Indirect serum antibody testing can be useful, although it should be evaluated considering age-dependent levels of antibody titres.

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Prevalence of Salmonella by Serological and Direct Detection Methods in Piglets from Inconspicuous, Conspicuous, and Vaccinated Sow Herds

Cited by 3 publications

References 20 publications

Sock and Environmental Swabs as an Efficient, Non-Invasive Tool to Assess the Salmonella Status of Sow Farms

Sock and Environmental Swabs as an Efficient, Non-Invasive Tool to Assess the Salmonella Status of Sow Farms

Rye and Rye Bran as Components of Diets in Piglet Production—Effects on Salmonella Prevalence

Epidemiological Study on Salmonella Prevalence in Sow Herds Using Direct and Indirect Detection Methods

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