{"id":662,"date":"2025-09-27T13:43:29","date_gmt":"2025-09-27T13:43:29","guid":{"rendered":"https:\/\/boudivet.com\/?p=662"},"modified":"2025-09-27T13:46:45","modified_gmt":"2025-09-27T13:46:45","slug":"salmonellosis-a-zoonotic-threat-in-animals-and-humans","status":"publish","type":"post","link":"https:\/\/boudivet.com\/?p=662","title":{"rendered":"Salmonellosis: A Zoonotic Threat in Animals and Humans"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Introduction<\/h3>\n\n\n\n<p data-block-type=\"core\">Salmonellosis is an infectious disease caused by bacteria of the genus <strong>Salmonella<\/strong>, belonging to the family <strong>Enterobacteriaceae<\/strong>. It affects a wide range of animal species (cattle, poultry, horses, dogs, cats, reptiles) and humans, making it a significant zoonosis. The disease ranges from asymptomatic carriage to severe systemic infection, posing health and economic risks in veterinary practice.<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Genus<\/strong>: Salmonella<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Family<\/strong>: Enterobacteriaceae<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Species<\/strong>: Over 2,500 serovars identified (e.g., <em>S. Typhimurium<\/em>, <em>S. Enteritidis<\/em>).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\" data-block-type=\"core\"><img loading=\"lazy\" decoding=\"async\" width=\"889\" height=\"710\" src=\"https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_14466_www.bing_.com_.jpeg\" alt=\"\" class=\"wp-image-640\" style=\"width:631px;height:auto\" srcset=\"https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_14466_www.bing_.com_.jpeg 889w, https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_14466_www.bing_.com_-300x240.jpeg 300w, https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_14466_www.bing_.com_-768x613.jpeg 768w\" sizes=\"auto, (max-width: 889px) 100vw, 889px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Morphology and Characteristics of Salmonella<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Gram-negative bacilli<\/strong> (rod-shaped).<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Motile<\/strong> due to peritrichous flagella (except <em>S. Gallinarum<\/em>).<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Facultative anaerobes<\/strong>, able to survive in intestinal and extra-intestinal environments.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Non-spore forming<\/strong>, but highly resistant in moist conditions.<\/li>\n\n\n\n<li data-block-type=\"core\">Grow readily on routine culture media (MacConkey, SS agar).<\/li>\n\n\n\n<li data-block-type=\"core\">Produce hydrogen sulfide (H\u2082S) in triple sugar iron agar.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Resistance<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Survive weeks in water, feces, soil, and contaminated environments.<\/li>\n\n\n\n<li data-block-type=\"core\">Resistant to freezing but killed by pasteurization and most disinfectants (formalin, phenols, hypochlorites).<\/li>\n\n\n\n<li data-block-type=\"core\">Sensitive to heat at <strong>60\u00b0C for 15\u201320 minutes<\/strong> and to direct sunlight.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Transmission and Epidemiology<\/h3>\n\n\n\n<p data-block-type=\"core\">Salmonellosis is transmitted mainly via the <strong>fecal\u2013oral route<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Ingestion of contaminated food, water, or feed.<\/li>\n\n\n\n<li data-block-type=\"core\">Contact with infected animals or asymptomatic carriers.<\/li>\n\n\n\n<li data-block-type=\"core\">Contaminated equipment, bedding, or environment.<\/li>\n\n\n\n<li data-block-type=\"core\">Vertical transmission (from hen to egg in poultry).<\/li>\n<\/ul>\n\n\n\n<p data-block-type=\"core\"><strong>Zoonotic importance<\/strong>: Humans can acquire infection from contaminated milk, eggs, meat, or direct animal contact. This makes control at the veterinary level essential.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Pathogenicity and Clinical Signs<\/h3>\n\n\n\n<p data-block-type=\"core\">After ingestion, Salmonella invades the intestinal epithelium, survives intracellularly in macrophages, and spreads to lymph nodes, liver, and spleen. The clinical outcome depends on host immunity, bacterial strain, and infective dose.<\/p>\n\n\n\n<p data-block-type=\"core\"><strong>In animals<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Cattle<\/strong>: Fever, diarrhea (sometimes bloody), abortion in pregnant cows.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Poultry<\/strong>: Drop in egg production, diarrhea, septicemia, sudden death in chicks.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Horses<\/strong>: Acute colitis, fever, diarrhea, endotoxemia.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Dogs and cats<\/strong>: Vomiting, diarrhea, anorexia.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Reptiles<\/strong>: Often asymptomatic carriers, dangerous for human transmission.<\/li>\n<\/ul>\n\n\n\n<p data-block-type=\"core\"><strong>In humans<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Gastroenteritis (nausea, vomiting, diarrhea, abdominal pain).<\/li>\n\n\n\n<li data-block-type=\"core\">Typhoid-like systemic infection in severe cases.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Incubation Period<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Usually <strong>6\u201372 hours<\/strong> post ingestion.<\/li>\n\n\n\n<li data-block-type=\"core\">Duration of illness: 2\u20137 days in mild cases; longer in systemic or complicated cases.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Laboratory Diagnosis<\/h3>\n\n\n\n<p data-block-type=\"core\">Diagnosis is essential for confirmation and outbreak control. Methods include:<\/p>\n\n\n\n<ol class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Bacteriological culture<\/strong>:\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Isolation from feces, blood, or tissues on selective media (SS agar, XLD agar).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Biochemical identification<\/strong>:\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">H\u2082S production, sugar fermentation tests.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Serotyping<\/strong>:\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Using specific antisera against O (somatic) and H (flagellar) antigens.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Molecular detection<\/strong>:\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">PCR-based methods for rapid and sensitive detection.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Serology (ELISA)<\/strong>:\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Useful in flock or herd surveillance.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Prevention and Control<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Hygiene and sanitation<\/strong>: Regular disinfection of housing, equipment, and food storage.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Biosecurity<\/strong>: Prevent entry of infected animals, rodents, and contaminated feed.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Vaccination<\/strong>:\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Poultry and cattle vaccines are available and effective in reducing disease incidence.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Responsible antibiotic use<\/strong>: To avoid antimicrobial resistance.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Public health education<\/strong>: Hand hygiene after handling animals, avoiding consumption of raw milk\/eggs.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Treatment<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Supportive therapy<\/strong>: Rehydration, electrolyte replacement in diarrheic animals.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Antibiotics<\/strong>: Only under veterinary guidance, as resistance is a major concern (fluoroquinolones, cephalosporins, trimethoprim-sulfonamides in severe cases).<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Probiotics and prebiotics<\/strong>: Help restore gut flora and reduce recurrence.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Importance for Veterinary and Public Health<\/h3>\n\n\n\n<p data-block-type=\"core\">Salmonellosis is a <strong>One Health concern<\/strong>, bridging veterinary and human medicine. Early detection and control in animals reduce zoonotic transmission and safeguard food safety.<\/p>\n\n\n\n<p data-block-type=\"core\">At <strong>Dr. Boudi Widad Veterinary Clinic<\/strong>, we offer:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Early diagnosis<\/strong> with laboratory confirmation.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Effective treatment protocols<\/strong> tailored to the animal\u2019s condition.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Vaccination programs<\/strong> for prevention in farms.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Awareness campaigns<\/strong> for pet owners and farmers to limit zoonotic spread.<\/li>\n<\/ul>\n\n\n\n<p data-block-type=\"core\">Protecting animal health means protecting human health \u2014 <strong>controlling Salmonellosis in animals reduces outbreaks in people<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Salmonellosis is an infectious disease caused by bacteria of the genus Salmonella, belonging to the family Enterobacteriaceae. It affects a wide range of animal species (cattle, poultry, horses, dogs, cats, reptiles) and humans, making it a significant zoonosis. The disease ranges from asymptomatic carriage to severe systemic infection, posing health and economic risks in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":640,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-662","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animal-disease"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts\/662","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=662"}],"version-history":[{"count":1,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts\/662\/revisions"}],"predecessor-version":[{"id":663,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts\/662\/revisions\/663"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/media\/640"}],"wp:attachment":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}