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1.
Braz. j. vet. res. anim. sci ; 52(1): 63-67, abr. 2015. ilus
Article in Portuguese | LILACS | ID: lil-786778

ABSTRACT

O presente trabalho relata um surto de mortalidade de tambacus (Colossoma macropomum x Piaractus mesopotamicus) criados em tanques escavados da Fazenda-Escola da UCDB. Os peixes apresentaram sintomas clínicos de letargia, anorexia, aumento da produção de muco, nado desordenado e comportamento de buscar a superfície da água. Ao exame necroscópico de três peixes foram evidenciadas hemorragias nas nadadeiras e pele, opacidade de córnea, hemoperitôneo, distensão e repleção da vesícula biliar e congestão e hemorragia do tubo digestivo. O exame microbiológico dos materiais coletados das lesões dos tambacus foi positivo para a bactéria Edwardsiella tarda. A análise de qualidade de água indicou grande quantidade de fitoplânctons que proliferaram em função do excesso de matéria orgânica, caracterizando a eutrofização da água. Atribuiu-se a causa da morte dos tambacus à infecção oportunista pela E. tarda, favorecida pelo desequilíbrio devido ao excesso de matéria orgânica em suspensão na água. As mortes cessaram após a correção dos parâmetros da qualidade da água do tanque.


An outbreak of mortality of tambacus (Colossoma macropomum x Piaractus mesopotamicus) cultivated in dug tanks at UCDB was reported. Animals had clinical surface symptoms of lethargy, anorexia, increased mucus production, cluttering and swimming toward the water. Macroscopic examination of three fishes showed hemorrhages of the fins and skin, corneal opacity, hemoperitoneum, gallbladder distension and repletion, congestion and hemorrhages of the digestive tract. Water quality analysis indicated large amounts of phytoplankton that proliferated as a result of the excessive organic matter causing eutrophication of the water. The microbiological examination of tambacus lesions revealed the presence of the bacterium Edwardsiella tarda. The cause of the tambacus death was attributed to opportunistic infection by E. tarda, favored by the imbalance due to the intense organic matter in suspended in the water. Deaths stopped after the correction of the water quality parameters.


Subject(s)
Animals , Characidae/microbiology , Edwardsiella tarda/isolation & purification , Edwardsiella tarda/pathogenicity , Eutrophication , Waterborne Diseases
2.
Braz. j. microbiol ; 45(3): 1095-1099, July-Sept. 2014. ilus, tab
Article in English | LILACS | ID: lil-727043

ABSTRACT

Edwarsiella tarda is a zoonotic bacterium that can be isolated from humans, animals and the environment. Although E. tarda is primarily considered a fish pathogen, it is the only species of its genus considered to be pathogenic for humans as well. A survey of zoonotic intestinal bacteria in fresh feces from South American sea lions (SASL) Otaria flavescens, reported E. tarda as the most frequently isolated species. In this study, we used HEp-2 cells to establish in vitro the adherence and invasive ability of 17 E. tarda strains isolated from SASL fecal material. All the strains were able to adhere and invade HEp-2 cells with adhesion and invasion percentages ranging from 56 to 100% and 21 to 74%, respectively. Despite the expression of these pathogenic factors, further investigation is needed to determine whether this bacterium could play a role as primary pathogen for this and other species of pinnipeds.


Subject(s)
Animals , Humans , Bacterial Adhesion , Endocytosis , Edwardsiella tarda/physiology , Enterobacteriaceae Infections/veterinary , Hepatocytes/microbiology , Sea Lions/microbiology , Edwardsiella tarda/isolation & purification , Enterobacteriaceae Infections/microbiology , South America
3.
Indian J Med Microbiol ; 2012 Jul-Sept; 30(3): 352-354
Article in English | IMSEAR | ID: sea-143984

ABSTRACT

Edwardsiella tarda is very seldom a cause for gastroenteritis in humans. This organism can also cause extraintestinal infections, such as soft tissue infections, meningitis, peritonitis, osteomyelitis, endocarditis and hepatobiliary tract disease, particularly in the setting of compromised immunity. We describe, for the first time a case of E. tarda sepsis with multiple liver abscesses associated with Cushing's syndrome as a result of recreational aquatic exposure.


Subject(s)
Adolescent , Cushing Syndrome/complications , Edwardsiella tarda/isolation & purification , Enterobacteriaceae Infections/diagnosis , Enterobacteriaceae Infections/microbiology , Enterobacteriaceae Infections/pathology , Humans , Liver Abscess/complications , Liver Abscess/diagnosis , Liver Abscess/microbiology , Liver Abscess/pathology , Male , Radiography, Abdominal , Sepsis/complications , Sepsis/diagnosis , Sepsis/microbiology , Sepsis/pathology , Tomography, X-Ray Computed
4.
Arq. bras. med. vet. zootec ; 60(1): 275-277, fev. 2008. tab
Article in English | LILACS | ID: lil-483289

ABSTRACT

Investigaram-se as causas da mortalidade de peixes ocorrida em janeiro de 2005 na bacia do Rio São Francisco, Brasil. Edwardsiella tarda foi isolada dos rins de pacu Myleus micans. O isolado, denominado Et-LIS, caracterizado por bastonetes Gram negativos móveis, foi identificado por testes bioquímicos e confirmado pelo kit comercial Bactray. A susceptibilidade a 10 drogas das 12 testadas foi determinada pelo método de difusão de discos, enquanto as características de virulência foram avaliadas mediante inoculação experimental em Cyprinus carpio e em Oreochromis spp. Ambas as espécies desafiadas apresentaram sinais compatíveis com infecção por E. tarda. As tilápias (Oreochromis spp.) morreram 48h após a inoculação, enquanto as carpas (Cyprinus carpio) sobreviveram por 72h. Este é o primeiro relato da ocorrência de E. tarda em pacu.


Subject(s)
Animals , Edwardsiella tarda/isolation & purification , Fishes , Measures of Disease Occurrence , Mortality , Veterinary Medicine
5.
Pulmäo RJ ; 13(3): 200-202, jul.-set. 2004. ilus
Article in Portuguese | LILACS | ID: lil-401679

ABSTRACT

Os autores descrevem o primeiro caso registrado de empiema pleural causado por Edwardsiella tarda, uma bactéria Gram negativa, e fazem uma revisão da literatura das infecções causadas por este patógeno


Subject(s)
Humans , Male , Aged , Edwardsiella tarda/isolation & purification , Empyema, Pleural/microbiology , Enterobacteriaceae Infections/complications , Enterobacteriaceae Infections/diagnosis , Enterobacteriaceae Infections/drug therapy
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