Probiotic yeast enhanced growth performance and disease resistance in freshwater catfish gulsa tengra, Mystus cavasius

•The diet with baker’s yeast was significantly (P < 0.05) promoted the growth and survival rate of gulsa tengra compared to control diet.•Weight gain, condition factor, SGR, and PCR were significantly highest and improved FCR in the T3 than other treatments.•The lowest fish mortality rate of the challenged fish was observed in the T3 treatment.