Rhombencephalitis caused by Listeria monocytogenes in a pastured bull.
A pastured 2-y-old cross-breed bull developed brainstem encephalitis (rhombencephalitis); Listeria monocytogenes was isolated from the brain. In the brainstem, there was perivascular cuffing, multiple microabscesses, and positive immunostaining for L. monocytogenes. Samples of bovine feces, water, feedstuffs, milking parlor soil, and bulk tank milk were collected from the dairy farm. Seven isolates of the genus Listeria were obtained, 6 of L. innocua and 1 of L. monocytogenes, which was found in the pasture where the bull grazed. Both isolates belonged to serotype 4b and were positive for internalins A, C, and J. According to the DNA fragment patterns of pulsed-field gel electrophoresis, the isolates were closely related. The source of infection was the pasture, implying that listeriosis should not be discounted in cases with compatible clinical signs but the absence of silage feeding.
Facultad de Veterinaria (Matto) and Instituto de Higiene Facultad de Medicina (Varela, Mota), Universidad de la República, Uruguay.|Laboratorio Regional Noroeste DILAVE "Miguel C. Rubino", Ministerio de Ganadería, Agricultura y Pesca, Uruguay (Gianneechini, Rivero).
Carolina
C
Matto
Facultad de Veterinaria (Matto) and Instituto de Higiene Facultad de Medicina (Varela, Mota), Universidad de la República, Uruguay.|Laboratorio Regional Noroeste DILAVE "Miguel C. Rubino", Ministerio de Ganadería, Agricultura y Pesca, Uruguay (Gianneechini, Rivero).
Gustavo
G
Varela
Facultad de Veterinaria (Matto) and Instituto de Higiene Facultad de Medicina (Varela, Mota), Universidad de la República, Uruguay.|Laboratorio Regional Noroeste DILAVE "Miguel C. Rubino", Ministerio de Ganadería, Agricultura y Pesca, Uruguay (Gianneechini, Rivero).
María Inés
MI
Mota
Facultad de Veterinaria (Matto) and Instituto de Higiene Facultad de Medicina (Varela, Mota), Universidad de la República, Uruguay.|Laboratorio Regional Noroeste DILAVE "Miguel C. Rubino", Ministerio de Ganadería, Agricultura y Pesca, Uruguay (Gianneechini, Rivero).
Ruben
R
Gianneechini
Facultad de Veterinaria (Matto) and Instituto de Higiene Facultad de Medicina (Varela, Mota), Universidad de la República, Uruguay.|Laboratorio Regional Noroeste DILAVE "Miguel C. Rubino", Ministerio de Ganadería, Agricultura y Pesca, Uruguay (Gianneechini, Rivero).
Rodolfo
R
Rivero
D000821:Animal Feed / Q000382:microbiology; D000822:Animal Husbandry; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis* / Q000382:microbiology; D003937:Diagnosis, Differential; D016521:Electrophoresis, Gel, Pulsed-Field / Q000662:veterinary; D004660:Encephalitis / Q000175:diagnosis* / Q000382:microbiology; D008089:Listeria monocytogenes / Q000235:genetics / Q000302:isolation & purification*; D008088:Listeriosis / Q000175:diagnosis / Q000662:veterinary*; D008297:Male
Animal grazing; Listeria monocytogenes; encephalitis; ruminant