Description    The Gram-negative rod of the genus SALMONELLA has one species called ENTERICA, 6 subspecies and over 2000 serotypes, some of which are host-adapted. Signs range from acute to chronic; shedders can carry the organism without signs. Clinical Salmonellosis is most common in calves but can occur at any age. Septicemia, especially in young calves, causes sloughing of the skin of the extremities in rare cases and meningitis is sometimes part of the disease syndrome. Abortion can follow fetal infection. This is a zoonosis.
Species   Bovine
Signs   Abortion or weak newborns, Agalactia, Alopecia, Anorexia, Bloody stools, feces, hematochezia, Cold skin, Colic, Coma, Congestion oral mucous membranes, Conjunctival, scleral, injection, Conjunctival, scleral, redness, Coughing, Cyanosis, Dehydration, Diarrhea, Dullness, Dyspnea, Fever, Forelimb lameness, Forelimb swelling, Generalized lameness or stiffness, Generalized weakness, Hindlimb lameness, Hindlimb swelling, Icterus, Inability to stand, Increased respiratory rate, Lack of growth or weight gain, Mastitis, Moist skin, hair or feathers, Mucoid nasal discharge, Mucous, mucoid stools, feces, Opisthotonus, Purulent nasal discharge, Reluctant to move, Seizures or syncope, Skin necrosis, Sudden death, Tachycardia, Underweight, poor condition, thin, emaciated, unthriftiness, ill thrift, Unusual or foul odor, stools, feces, Weight loss
References   Smith GW et al. Short communication: Characterization of the serologic response induced by vaccination of late-gestation cows with a Salmonella Dublin vaccine. Journal of Dairy Science 2015;98:25292532 [Web Reference]
Smith G. Antimicrobial Decision Making for Enteric Diseases of Cattle. Veterinary Clinics of North America: Food Animal Practice 2015;31:4760 [Web Reference]
Smith GW et al. Passive Immunity Stimulated by Vaccination of Dry Cows with a Salmonella Bacterial Extract. Journal of Veterinary Internal Medicine 2014;28:16021605 [Web Reference]
Brewer MT et al. Amelioration of salmonellosis in pre-weaned dairy calves fed Saccharomyces cerevisiae fermentation products in feed and milk replacer. Veterinary Microbiology 2014;172:248255 [Web Reference]
Rodriguez-Rivera LD et al. Subtype analysis of Salmonella isolated from subclinically infected dairy cattle and dairy farm environments reveals the presence of both human- and bovine-associated subtypes. Veterinary Microbiology 2014;170:307316 [Web Reference]
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