{"id":403085,"date":"2020-11-24T11:37:02","date_gmt":"2020-11-24T10:37:02","guid":{"rendered":"http:\/\/phileo-lesaffre.com\/?p=403085"},"modified":"2022-02-16T16:50:31","modified_gmt":"2022-02-16T15:50:31","slug":"salmonella-undermine-food-safety","status":"publish","type":"post","link":"https:\/\/phileo-lesaffre.com\/en\/salmonella-undermine-food-safety\/","title":{"rendered":"Prevent Salmonella from undermining food safety"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; z_index=&#8221;&#8221; css=&#8221;.vc_custom_1598509169065{padding-bottom: 35px !important;}&#8221;][vc_column][vc_column_text]<strong>Ruth Raspoet, PhD, Poultry R&amp;D manager<\/strong>[\/vc_column_text][vc_separator type=&#8221;transparent&#8221; up=&#8221;15&#8243; down=&#8221;15&#8243;][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; z_index=&#8221;&#8221; el_class=&#8221;noPadding&#8221;][vc_column][vc_column_text]<img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-403066 size-medium alignleft\" src=\"http:\/\/phileo-lesaffre.com\/wp-content\/uploads\/2020\/11\/Image-N\u00b02-300x196.jpg\" alt=\"food safety phileo\" width=\"300\" height=\"196\" srcset=\"https:\/\/phileo-lesaffre.com\/wp-content\/uploads\/2020\/11\/Image-N\u00b02-300x196.jpg 300w, https:\/\/phileo-lesaffre.com\/wp-content\/uploads\/2020\/11\/Image-N\u00b02-570x375.jpg 570w, https:\/\/phileo-lesaffre.com\/wp-content\/uploads\/2020\/11\/Image-N\u00b02-400x260.jpg 400w, https:\/\/phileo-lesaffre.com\/wp-content\/uploads\/2020\/11\/Image-N\u00b02.jpg 575w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Despite successful <em>Salmonella<\/em> control measures implemented in food-animal production, salmonellosis remains one of the most frequently occurring food-borne zoonoses worldwide, with poultry and poultry products as the main transmission vector. In general, about 65% of the animals belonging to a flock are identified as asymptomatic carriers and are colonized by <em>Salmonella<\/em> spp. Serotypes colonizing the gastrointestinal tract are variable, depending on the geographical location, time of the year, but part of them are repeatable e.g. <em>Salmonella<\/em> Enteritidis and Typhimurium. Moreover, the occurrence of antimicrobial resistance in non-typhoidal <em>Salmonella<\/em> is considered an additional major public health concern. Consequently, with the increasing consumption of poultry products, new intervention strategies are necessary along the food chain to reduce <em>Salmonella<\/em> prevalence during poultry production.<\/p>\n<p>&nbsp;<\/p>\n<p>In the poultry industry, eggs and egg products can become contaminated through vertical transmission of the bacteria through the reproductive tract or horizontally on the eggshell when passing the cloaca or after contact with feces. Meat on the other hand, most often, becomes infected during the production process when bacteria of the intestine are contaminating the carcass as a result. Therefore, and since the gastrointestinal tract of food-producing animals is the main reservoir of non-typhoidal <em>Salmonella<\/em>, reduced colonization of this organ by the bacterial species is of outmost importance.<\/p>\n<p>&nbsp;<\/p>\n<p>In this context yeast probiotics and postbiotics are playing a crucial role in animal health industry, as they can contribute to the reduction of antibiotics use while improving animal health and maintaining their productive potential. Yeast fractions are rich in mannoproteins, mannans and \u03b2-glucans, enabling them to modulate the gut physiology, microflora composition and the immune system.<br \/>\nTherefore, a study was carried out to evaluate the effect of the supplementation of Safmannan<sup>\u00ae<\/sup>, high-quality selected yeast postbiotic, on <em>Salmonella <\/em>Typhimurium colonization in broilers.<\/p>\n<p>&nbsp;<\/p>\n<p>At day 1 of the trial, newly hatched broiler chicks were divided over 3 isolators, each representing one treatment group; the unchallenged control (UC), the challenged control (CC) and Safmannan<sup>\u00ae<\/sup> supplemented and challenged group. At day 2, animals in the challenged control and the Safmannan<sup>\u00ae<\/sup> group were orally inoculated with 10<sup>8<\/sup> CFU of <em>Salmonella<\/em> Typhimurium ATCC 14028. Individual body weights were recorded at days 3, 7, 14 and 28. Immune parameters, histology scores and <em>Salmonella<\/em> Typhimurium loads in liver and ceca were determined at day 28.<\/p>\n<p>&nbsp;<\/p>\n<p>Challenge with <em>Salmonella<\/em> Typhimurium reduced body weights in the challenged control group early after challenge, while this reduction in performance was adverted by supplementation of Safmannan<sup>\u00ae<\/sup> into the diet of the challenged animals (Table.1).[\/vc_column_text][vc_separator type=&#8221;transparent&#8221; up=&#8221;10&#8243; down=&#8221;10&#8243;][vc_single_image image=&#8221;403086&#8243; img_size=&#8221;large&#8221; alignment=&#8221;center&#8221; qode_css_animation=&#8221;&#8221;][vc_separator type=&#8221;transparent&#8221;][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; z_index=&#8221;&#8221; el_class=&#8221;noPadding&#8221;][vc_column][vc_column_text]Additionally, the challenged control exhibited significantly increased <em>Salmonella <\/em>Typhimurium numbers in liver and caecum compared to the negative control group, which remained negative for <em>Salmonella <\/em>throughout the experiment. Safmannan<sup>\u00ae<\/sup> was able to decrease the colonization of Salmonella Typhimurium in the liver (Fig. 1a) and ceca (Fig.1b) of broilers, while decreasing the lesion score in the cecum at 28 days of age.[\/vc_column_text][vc_separator type=&#8221;transparent&#8221; up=&#8221;10&#8243; down=&#8221;10&#8243;][vc_single_image image=&#8221;403090&#8243; img_size=&#8221;large&#8221; alignment=&#8221;center&#8221; qode_css_animation=&#8221;&#8221;][vc_separator type=&#8221;transparent&#8221;][vc_column_text]The results also demonstrated the effect of Safmannan<sup>\u00ae<\/sup> on the mucosal immune system, since supplemented birds were able to produce higher antibody titers of IgA against <em>Salmonella<\/em> LPS and flagellin (Fig.2).[\/vc_column_text][vc_separator type=&#8221;transparent&#8221;][vc_single_image image=&#8221;403115&#8243; img_size=&#8221;large&#8221; alignment=&#8221;center&#8221; qode_css_animation=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; z_index=&#8221;&#8221; el_class=&#8221;noPadding&#8221;][vc_column][vc_column_text]The effects of Safmannan<sup>\u00ae<\/sup> can be explained by the occurrence of \u03b2-glucans which allows them to modulate the immune system, while the presence of mannans can associate them with bacteria possessing type-1 fimbriae, such as <em>Salmonella<\/em>, making it more difficult for them to colonize the intestinal epithelium.<\/p>\n<p>&nbsp;<\/p>\n<p>Microflora analysis of a previously performed nutritional stress study with administration of Safmannan<sup>\u00ae<\/sup>, showed that the supplemented animals had a microbiota composition exhibiting a higher diversity. Significant increases in beneficial genera such as, <em>Roseburia, Ruminococcus torques, Eubacterium hallii<\/em> and <em>Shuttleworthia<\/em> were observed. As an inhabitant of the healthy animal intestine, <em>Ruminococcus<\/em> <em>torques<\/em> probably increased its prevalence in the supplemented animals due to its capacity to convert\/metabolise complex polysaccharides into nutrients that are beneficial for the host. Additionally, species belonging to the genus <em>Eubacterium<\/em> <em>hallii<\/em> and <em>Roseburia<\/em> are known to be able to interact with the acetate and lactate to produce butyric and propionic acid which have the capacity to strengthen the epithelial barrier function and positively impact the microbiota by reducing the pathogenic species. The latter was demonstrated by a decrease in the number of Enterobacteriaceae in the animals supplemented with Safmannan<sup>\u00ae<\/sup>.<\/p>\n<p>&nbsp;<\/p>\n<p>In conclusion it can be confirmed that Safmannan<sup>\u00ae<\/sup> is able to modulate the microbiota and the immune system and in turn decrease the outcomes of <em>Salmonella<\/em> Typhymurium infections in broilers, leading to less colonization of the gastrointestinal tract and thus also carcass contamination during the production process.[\/vc_column_text][vc_separator type=&#8221;transparent&#8221; up=&#8221;10&#8243; down=&#8221;10&#8243;][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Evaluation of the effect of the supplementation of Safmannan\u00ae on Salmonella Typhimurium colonization in broilers.<\/p>\n","protected":false},"author":1,"featured_media":411400,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,48,55],"tags":[],"class_list":["post-403085","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-broilers","category-safmannan","category-salmo-control"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Prevent Salmonella from undermining food safety &#8226; 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