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Publication
Meningite bacteriana supurativa neonatal em bovinos
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Abstract(s)
A meningite em ruminantes, apesar de não ser diagnosticada com frequência, é uma das patologias
do Sistema Nervoso Central mais comuns nestes animais. As meninges são constituídas por três
estruturas: dura máter, aracnoide e pia máter. A inflamação da pia máter (camada mais interna das
meninges) resulta numa leptomeningite. Pode ser provocada por diversos agentes bacterianos,
nomeadamente agentes respiratórios como Histophilus somni, Mannheimia haemolytica e Pasteurella
multocida, mas também por agentes predominantemente entéricos como a Escherichia coli. Pode ainda
ser classificada de acordo com sua duração, localização, estruturas envolvidas, causa e lesões
histopatológicas.
Este estudo tem como principal objetivo relatar os achados clínicos/patológicos encontrados num
caso clínico de um vitelo neonato com evidências de leptomeningite por Streptococcus spp. e
Escherichia coli, diagnosticada após ter sido realizada necropsia com recolha de material e tecido
purulento. Quando existem falhas de imunidade no hospedeiro, estes dois agentes são capazes de
fazer disseminações até ao líquido cefalorraquidiano, onde se multiplicam e levam ao aparecimento de
lesões purulentas, com manifestação clínica designada de Meningite Supurativa Bacteriana Neonatal
em bovinos.
Meningitis in ruminants, despite not being diagnosed frequently, is one of the most common Central Nervous System pathologies in these animals. The meninges are made up of three structures: dura mater, arachnoid and pia mater. Inflammation of the pia mater (the innermost layer of the meninges) results in leptomeningitis. It can be caused by several bacterial agents, namely respiratory agents such as Histophilus somni, Mannheimia haemolytica and Pasteurella multocida, but also by predominantly enteric agents such as Escherichia coli. It can also be classified according to its duration, location, structure involved, cause and histopathological lesions. The main objective of this study is to report the clinical/pathological findings found in a clinical case of a newborn calf with evidence of leptomeningitis by Streptococcus spp. and Escherichia coli, diagnosed after a necropsy was performed with collection of material and purulent tissue. When there are immunity failures in the host, these two agents are capable of spreading to the cerebrospinal fluid, where they multiply and lead to the appearance of purulent lesions, with a clinical manifestation called Neonatal Bacterial Suppurative Meningitis in cattle.
Meningitis in ruminants, despite not being diagnosed frequently, is one of the most common Central Nervous System pathologies in these animals. The meninges are made up of three structures: dura mater, arachnoid and pia mater. Inflammation of the pia mater (the innermost layer of the meninges) results in leptomeningitis. It can be caused by several bacterial agents, namely respiratory agents such as Histophilus somni, Mannheimia haemolytica and Pasteurella multocida, but also by predominantly enteric agents such as Escherichia coli. It can also be classified according to its duration, location, structure involved, cause and histopathological lesions. The main objective of this study is to report the clinical/pathological findings found in a clinical case of a newborn calf with evidence of leptomeningitis by Streptococcus spp. and Escherichia coli, diagnosed after a necropsy was performed with collection of material and purulent tissue. When there are immunity failures in the host, these two agents are capable of spreading to the cerebrospinal fluid, where they multiply and lead to the appearance of purulent lesions, with a clinical manifestation called Neonatal Bacterial Suppurative Meningitis in cattle.
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Keywords
Colostro Escherichia coli Imunidade Leptomeningite Meninges Neuropatia Sistema Nervoso Central Streptococcus spp Central Nervous System Colostrum Escherichia coli Immunity Leptomeningite Meninges Neuropathy Streptococcus spp