Streptococcus dysgalactiae as an agent of septicaemia in Nile tilapia, Oreochromis niloticus (L.)

Netto, Lamartine N; Leal, Carlos Augusto Gomes; Figueiredo, Henrique César Pereira

doi:10.1111/j.1365-2761.2010.01220.x

Cited by 47 publications

(40 citation statements)

References 16 publications

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“…Of the 27 Streptococcus strains originating from the states of Mato Grosso do Sul, Paraná, and São Paulo, 89% corresponded to S. agalactiae; this was previously observed by Netto et al [33] and Figueiredo et al [10]. Although infection by S. agalactiae is the main cause of losses in tilapia farming worldwide, this pathogen has also been isolated from "cachara" originating from Mato Grosso do Sul.…”

Section: The Analysis Of the Common Bacterial Fish Pathogensmentioning

confidence: 58%

Identification of Bacterial Fish Pathogens in Brazil by Direct Colony PCR and 16S rRNA Gene Sequencing

Sebastião¹,

Furlan²,

Hashimoto³

et al. 2015

AiM

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Intensive fish farming systems in Brazil have increased the disease incidence, mainly of bacterial origin, due to higher stocking density, high organic matter levels and poor quality of the aquatic environment that causes high mortality rates during outbreaks. The identification of pathogenic species using a fast and reliable method of diagnosis is essential for successful epidemiological studies and disease control. The present study evaluated the use of direct colony PCR in combination with 16S rRNA gene sequencing to diagnose fish bacterial diseases, with the goal of reducing the costs and time necessary for bacterial identification. The method was successful for all 178 isolates tested and produced bands with the same intensity as the standard PCR performed using pure DNA. In conclusion, the genetics methods allowed detecting the most common and important pathogens in Aquaculture, including 12 species of occurrence in Brazilian fish farms. The results of the present study constitute an advance in the available diagnostic methods for bacterial pathogens in fish farms.

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Section: The Analysis Of the Common Bacterial Fish Pathogensmentioning

confidence: 58%

Identification of Bacterial Fish Pathogens in Brazil by Direct Colony PCR and 16S rRNA Gene Sequencing

Sebastião¹,

Furlan²,

Hashimoto³

et al. 2015

AiM

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“…), Amur sturgeon, Acipenser schrenckii (B.) in China (Yang & Li ) and Nile tilapia, Oreochromis niloticus (L.) in Brazil (Netto, Leal & Figueiredo ). In this study, the body weight ranges of disease fish have been recorded at around 190 g to 5 kg (cage cultured to market size).…”

Section: Discussionmentioning

confidence: 99%

Genetic characteristics of Streptococcus dysgalactiae isolated from cage cultured cobia, Rachycentron canadum (L.)

Wang

Yoshida

et al. 2014

Journal of Fish Diseases

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Disease outbreaks occurred during 2007-2013 in Taiwan with 2.5-10% mortality among the cage cultured cobia, Rachycentron canadum (L.), characterized by the presence of polyserositis, pericarditis and peritonitis. The micro-organisms isolated from internal organs were Gram-positive cocci. The isolates were confirmed as Streptococcus dysgalactiae by a polymerase chain reaction assay that yielded the expected specific 259 bp amplicon. Additionally, partial sequence of the 16S-23S rDNA intergenic spacer region of the GCS strain isolates from fish was also compared and produced 100% sequence identity with S. dysgalactiae (GenBank accession number AB252398). The genetic characterization was then determined by pulsed-field gel electrophoresis (PFGE) analysis. Based on PFGE, the Apa I or Sma I digestion patterns of chromosomal DNA of these isolates were grouped into three main clusters. Taiwanese strains were divided into two clusters, and the tet(M) gene was detected in cluster 1 (pulsotypes: A1-A2 and S1-S3), but not in cluster 2 strains (pulsotypes: A3-A4 and S4-S5). Three Japanese strains from amberjack, Seriola dumerili (Risso), were grouped into cluster 3 (pulsotypes: A5-A7 and S6-S8) and displayed no mortality to cobia in the challenge experiment. Conversely, Taiwanese strains from cobia and snubnose pompano, Trachinotus blochii (L.), displayed a mortality rate of 50-87.5% in cobia.

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“…S. dysgalactiae subsp. dysgalactiae has also shown the ability to cause severe cellulitis and toxic shock syndrome in cattle (10), septicemia in fish and dogs (11,12), and infective arthritis in sheep (13). To our knowledge, S. dysgalactiae subsp.…”

mentioning

confidence: 96%

New Tricks from an Old Cow: Infective Endocarditis Caused by Streptococcus dysgalactiae subsp. dysgalactiae

et al. 2015

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dWe present a case of infective endocarditis caused by Streptococcus dysgalactiae subsp. dysgalactiae, a major cause of bovine mastitis and previously thought to be an animal-restricted pathogen. The patient reported no direct contact with animals, and the clinical course was severe and complicated. CASE REPORTA 65-year-old male patient was admitted to Haukeland University Hospital in western Norway with radiating pain in his left shoulder, fever, and muscle ache. One month earlier, he had been admitted to a hospital in Spain with similar symptoms but was rapidly discharged with a diagnosis of shoulder tendinitis. He had a family history of sudden cardiac death, and his previous medical history included hypertrophic obstructive cardiomyopathy and a normal coronary angiography 7 years prior to the actual admission.Upon admission, he had a pulse rate of 100/min, a temperature of 39°C, and a respiratory frequency of 24/min, thus fulfilling the criteria of systemic inflammatory response syndrome (SIRS). He was pale, with a blood pressure of 118/59 mm Hg, and a holosystolic murmur was heard at the apex. No local signs of infection were observed over his left shoulder.The initial blood chemistry results were as follows, with normal range values in parentheses: hemoglobin, 8.5 g/dl (13.4 to 17.0 g/dl); C-reactive protein, 277 mg/liter (Ͻ5 mg/liter); leukocytes, 20.8 ϫ 10 9 /liter (3.5 ϫ 10 9 to 11.0 ϫ 10 9 /liter); neutrophils, 18.5 ϫ 10 9 /liter (1.7 ϫ 10 9 to 8.2 ϫ 10 9 /liter); sedimentation rate, 102 mm/h (0 to 20 mm/h); procalcitonin, 12.1 g/liter (Ͻ0.10 g/ liter); and troponin T, 896 ng/liter (Ͻ25 ng/liter). Thrombocytes were within the normal range. The electrocardiogram (ECG) demonstrated ST segment elevation in leads V 1 and V 2 and T inversion in leads V 4 to V 6 , indicative of ischemia.Antibiotic therapy was started on day 1 and included meropenem and vancomycin. A broader initial regimen than that recommended in the Norwegian National Antibiotic Guidelines was chosen since the patient had recently been admitted to a hospital in Spain. The following day, all four blood cultures grew nonhemolytic bacteria on blood agar. Species identification was performed using matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) and showed that the isolate was Streptococcus dysgalactiae. Subsequently, group C carbohydrate specificity was documented using a slide agglutination test (Oxoid, Cambridge, United Kingdom). The antimicrobial susceptibility testing showed that the group C streptococcus (GCS) isolate was fully susceptible to all tested antibiotics, with the following MICs: penicillin G, 0.008 mg/liter; ceftriaxone, Ͻ0.016 mg/liter; clindamycin, 0.25 mg/liter; vancomycin, 0.25 mg/liter; teicoplanin, 0.25 mg/liter; and linezolid, 1 mg/liter.A more thorough anamnestic interview revealed a history of weight loss of 6 kg, bloody stools, increasing pain in the left shoulder, and inaccuracy of vision. On examination, he had no peripheral vascular phenomena indicative of septic emboliz...

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Streptococcus dysgalactiae as an agent of septicaemia in Nile tilapia, Oreochromis niloticus (L.)

Cited by 47 publications

References 16 publications

Identification of Bacterial Fish Pathogens in Brazil by Direct Colony PCR and 16S rRNA Gene Sequencing

Identification of Bacterial Fish Pathogens in Brazil by Direct Colony PCR and 16S rRNA Gene Sequencing

Genetic characteristics of Streptococcus dysgalactiae isolated from cage cultured cobia, Rachycentron canadum (L.)

New Tricks from an Old Cow: Infective Endocarditis Caused by Streptococcus dysgalactiae subsp. dysgalactiae

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