BACKGROUND Streptococcosis is an important disease of tilapia throughout the world. In Malaysia, streptococcosis outbreak was commonly reported during the 3-month period of high water temperature between April and July. This study describes the duration of protection following single and double booster dose regimes against streptococcosis in tilapia using a feed-based vaccine containing formali...

A procedure established for the selective isolation of the species of Streptococcus responsible for rainbow trout streptococcosis in South Africa, consisted of the inoculation of samples into nutrient broth which had been supplemented with 100 micrograms/ml of nalidixic acid, 160 micrograms/ml of oxolinic acid or 200 micrograms/ml of sodium azide. After incubation, the sample was plated onto te...

Streptococcus iniae was recovered from diseased rainbow trout (Oncorhynchus mykiss, Walbaum) previously vaccinated against streptococcosis. PCR and serological methods indicate the presence of a new serotype in the diseased fish.

Off hand one would say that all the common bacterial infections show clinical differences at certain ages. Incidence, symptoms, signs, course, and prognosis vary. These express in part the levels of susceptibility and the mechanisms of resistance brought into play. Each time they are reconsidered it becomes more and more obvious that at one period one feature will be emphasized, at another time...

Infections with Streptococcus spp. were observed in Nile tilapia cultured in net cages in Lake Sentani, Papua, Indonesia. Clinical signs included exophthalmia, erratic swimming, ascites in abdominal cavity, and external hemorrhages. Four types of bacterial colonies (SK, K10, P20, and M12) were isolated from the brain, kidney, and eyes. Based on phenotypic and genetic (16S rDNA sequencing) chara...

The whole-genome sequences are described here for three group B Streptococcus (GBS) (S. agalactiae) serotype Ib isolates obtained from tilapia (Oreochromis niloticus) farmed at sites in Honduras, Costa Rica, and the United States. The bacteria were isolated from the brains of fish displaying signs of streptococcosis.

This study aims to examine the efficacy of oral whole-cell vaccine S. agalactiae with Artemia sp as a vector for prevention against Streptococcosis in tilapia fish. The fish seeds used were 2-3 cm size which did not carry bacteria and reared jars volume 3 liters many ten birds/jar. Giving orally by first soaking sp. times 15, 30, 60, 90, 120 150 minutes. Parameters observed relative percent sur...