Espécies e sorovares de Listeria isolados de animais doentes e portadores no Brasil

Hofer, Ernesto; Reis, Cristhiane Moura Falavina dos

doi:10.1590/s0100-736x2005000200003

Cited by 4 publications

(5 citation statements)

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“…A listeriose é uma doença aparentemente pouco freqüente no Brasil, ocorrendo geralmente casos esporádicos em bovinos, bubalinos, ovinos e caprinos, preferentemente durante o inverno e primavera (Schild 2001, Hofer & Dos Reis 2004, Rissi et al 2006, nas regiões sul e sudeste. Neste trabalho, o diagnóstico de 4 surtos, que ocorreram no final do período chuvoso e início do período seco sugere que a doença pode ser mais importante no semiárido do que em outras regiões do País.…”

Section: Discus Discus Discus Discus Discussão São São São Sãounclassified

Doenças do sistema nervoso central em caprinos e ovinos no semi-árido

et al. 2007

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conhecimento das doenças dos animais domésticos, nas diferentes regiões do Brasil é importante para determinar formas eficientes de profilaxia e controle. Este trabalho tem como objetivo descrever a epidemiologia, sinais clínicos e patologia das enfermidades do sistema nervoso central (SNC) de caprinos e ovinos, que ocorreram de janeiro de 2000 a maio de 2006 no semi-árido, principalmente do estado da Paraíba. Durante o período, 365 casos ou surtos foram diagnosticados em caprinos e 270 em ovinos. Desses, 63 (9,92%) eram doenças do SNC, sendo 34 (9,31%) em caprinos e 29 (10,7%) em ovinos. As principais enfermidades foram abscessos (19,04%), tétano (15,9%), raiva (9,52%) intoxicação por Ipomoea asarifolia (7,93%), listeriose (6,34%), trauma (6,34%), polioencefalomalacia (4,77%), toxemia da prenhez (3,17%), ataxia enzoótica (3,17%) e meningite (3,17% The knowledge of the diseases of domestic animals in the different Brazilian regions is important to determine measures for their control and prevention. The objective of this paper is to report the epidemiology, clinical signs and pathology of the diseases of the central nervous system (CNS) of goats and sheep in the Brazilian semiarid, mainly in the state of Paraíba, diagnosed at the Veterinary Hospital of the Federal University of Campina Grande, from January 2000 to May 2006. During the period, 365 cases or outbreaks were diagnosed in goats and 270 in sheep. From these, 63 (9.92%) were of diseases of the CNS, being 34 (9.31%) in goats and 29 (10.7%) in sheep. The main diseases were abscesses (19.04%), tetanus (15.9%), rabies (9.52%) poisoning by Ipomoea asarifolia (7.93%), listeriosis (6.34%), traumatism (6.34%), polioencephalomalacia (4.77%), pregnancy toxemia (3.17%), enzootic ataxia (3.17%), and meningitis (3.17%). Other diseases diagnosed in only one opportunity (1.59%) were intoxications by Crotalaria retusa, Ipomoea carnea, Ipomoea sericophylla and Prosopis juliflora, otitis with encephalitis, malformation, lymphoblastic lymphosarcoma, medulloblastoma, and focal symmetric necrosis. In 6.34% of the cases diagnosis was unknown.

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Section: Discus Discus Discus Discus Discussão São São São Sãounclassified

Doenças do sistema nervoso central em caprinos e ovinos no semi-árido

et al. 2007

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“…Data from the Laboratório Regional de Diagnóstico (LRD) of the Universidade Federal de Pelotas (UFPel) show that from 2000 to 2019, 8 cases of listeriosis in sheep were recorded. This disease is caused by Listeria monocytogenes and represents a risk to public health since it affects ruminants and humans [8,11]. This pathogenic bacterium can produce biofilm, which enables it to adhere to surfaces and survive for longer periods; therefore, it is capable of contaminating food [5] and is widely spread in the environment.…”

Section: Introductionmentioning

confidence: 99%

“…This pathogenic bacterium can produce biofilm, which enables it to adhere to surfaces and survive for longer periods; therefore, it is capable of contaminating food [5] and is widely spread in the environment. It is also found in decaying vegetable matter [10] and the feces and fluids of domestic animals [6,8].…”

Section: Introductionmentioning

confidence: 99%

Listeriosis Outbreak in Sheep Raised in Feedlots in the Southern Region of Rio Grande do Sul State, Brazil

Ribeiro¹,

Scheid²,

Marques³

et al. 2022

Acta Scientiae. Vet.

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Background: A listeriosis outbreak in a sheep fattening feedlot in the Southern Region of Rio Grande do Sul State, Brazil is described. This disease is caused by Listeria monocytogenes and represents a risk to public health since it affects not only ruminants but also humans. This agent is widely spread in the environment, such as in the soil and water. It is also found in decaying vegetable matter and the feces and fluids of domestic animals. The aim of this study was to describe a listeriosis outbreak in sheep raised in feedlots, its epidemiology, and to establish the importance of this disease in this type of sheep management system, evaluate the possible sources of infection, and suggest ways to control it.Cases: Sheep were kept in a 2-sector shed, one with east solar orientation and the other with west solar orientation, the latter with free access to domestic birds. Sheep were fed silage and concentrate. Seven sheep were affected, 5 died and 2 recovered. Clinically, the sheep displayed loss of balance, excessive drooling, and tremors; one exhibited circling, head deviation, apathy, nystagmus, lateral recumbency, paddling, and labored breathing. At necropsy, macroscopic lesions were not found, and histologically several micro-abscesses and perivascular cuffs with lymphocytes, macrophages, and neutrophils were present in the brain stem. Listeria monocytogenes suspected colonies were observed in the microbiological culture, and the bacteria was identified by biochemical analysis. The immunohistochemistry test in brain stem sections was positive for the antibody BD DifcoTM Listeria O Antiserum Poly Serotypes 1 and 4.Discussion: A listeriosis outbreak in a feedlot sheep was confirmed through epidemiological findings, histological lesions, bacterial culture, and immunohistochemistry analysis. This infection is frequent in sheep fed silage of poor quality or other food with improper storage and lack of hygiene. In the present outbreak, the bacteria were isolated from silage. However, it is likely that domestic birds, which were raised in the same place and had free access to the west sector of the feedlot, were the initial source of infection, because the sheep from the opposite sector (east) did not get ill. The disease caused by environmental contamination or through contact with fluids and feces of ducks, chickens, cattle, and pigs has already been described in outbreaks that occurred in the central region of Rio Grande do Sul. Sheep aggregation in feedlot systems is also a favorable factor for the development of the bacteria and the occurrence of outbreaks because the accumulation of feces and urine cause humidity on the stalls. This allows outbreaks to occur in other seasons of the year, such as in the outbreak reported herein. The exchange of silage that served as food for sheep was another control measure, and new cases were not reported 8 months after these procedures were taken. In the outbreak studied, 2 sheep that exhibited clinical signs were treated with oxytetracycline and recovered. Some authors report that treatment for listeriosis is inefficient because neurological lesions are irreversible. Nonetheless, other studies have reported the recovery of some animals when they were treated with oxytetracycline or a combination of oxytetracycline and dexamethasone or ampicillin and gentamicin like in the outbreak described in this paper.Keywords: Listeria monocytogenes, central nervous system, silage, feedlot, ovine.

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“…innocua, shedding this microorganism in the faeces (Hofer & Reis, 2005;Matto et al, 2018). However, there are only two reports of L. innocua as the cause of meningoencephalitis in ruminants (Rocha et al, 2013;Walker et al, 1994), to be contrasted to the numerous reports of animal listeriosis due to L. monocytogenes strains (Walland et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Along with the observed histopathologic lesion in the CNS, this supports the hypothesis that L. innocua was the agent responsible for the nervous symptoms of these animals. It has been previously described that cattle are asymptomatic carriers of L. innocua , shedding this microorganism in the faeces (Hofer & Reis, 2005 ; Matto et al., 2018 ). However, there are only two reports of L. innocua as the cause of meningoencephalitis in ruminants (Rocha et al., 2013 ; Walker et al., 1994 ), to be contrasted to the numerous reports of animal listeriosis due to L. monocytogenes strains (Walland et al., 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Listeria innocua isolated from diseased ruminants harbour minor virulence genes of L. monocytogenes

Matto¹,

D’Alessandro

Mota

et al. 2022

Veterinary Medicine & Sci

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Listeriosis is one of the most common nervous diseases in ruminants, and is caused almost exclusively by the Gram-positive bacterium, Listeria monocytogenes. However, there are few reports of listeriosis associated with L. innocua, which is genetically closely related to L. monocytogenes, but considered non-pathogenic. In this work, we report two cases of suppurative meningoencephalitis in apparently previously healthy ruminants from different farms, in which two strains of L. innocua were recovered. The whole genomes from both isolates were sequenced, allowing phylogenetic analyses to be performed, which indicated that the two strains were very closely related. Virulence determinants were searched, especially genes coding for the main L. monocytogenes virulence factors which have been previously described in L. innocua. Surprisingly, the two isolates do not possess such virulence determinants. Instead, both strains carried a set of genes that encode for other virulence factors of the genus Listeria detected using the Virulence Factor Database (VFDB): iap (division and invasion of host cells), lpeA (entry into non-professional phagocytes cells), fbpA (multifunctional virulence factor, including adherence to host cells), lspA (surface protein anchoring), lap (adhesion to enterocytes and trans epithelial translocation), pdgA (resistance to lysozyme), oatA (resistance to different antimicrobial compounds and also required for growth inside macrophages), lplA1 (use of host-metabolites for in vivo growth), gtcA (catalyses teichoic acid of bacterial wall), prsA2 (cell invasion, vacuole lysis and intracellular growth), clpC, clpE and clpP (survival under several stress conditions). These genes among others detected, could be involved in the ability of L. innocua to produce damage in animal and human hosts. These results highlight the multifactorial profile of Listeria pathogenesis and the need for comprehensive scientific research that address microbiological, environmental and veterinary aspects of listeriosis.

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Espécies e sorovares de Listeria isolados de animais doentes e portadores no Brasil

Cited by 4 publications

References 17 publications

Doenças do sistema nervoso central em caprinos e ovinos no semi-árido

Doenças do sistema nervoso central em caprinos e ovinos no semi-árido

Listeriosis Outbreak in Sheep Raised in Feedlots in the Southern Region of Rio Grande do Sul State, Brazil

Listeria innocua isolated from diseased ruminants harbour minor virulence genes of L. monocytogenes

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