Myzus persicae is an economically important pest infecting more than 40 families of crops throughout the world. Six entomopathogenic fungal isolates, three each of Beauveria bassiana and Verticillium lecanii, were screened for pathogenicity test against the M. persicae to select high virulent isolate with the most suitable application and to determine the role of individual enzyme in its virule...

1. Cultures of Diplococcus pneumoniae, Bacillus coli, Bacillus fluorescens liquefaciens and Bacillus prodigiosus, when grown in meat infusion broth exhibit an initial latent period when the culture used for inoculation is no longer growing at its maximum rate; if, however, the culture is growing at its most rapid rate the bacteria, upon subculture, show no latent period but continue to multiply...

BACKGROUND While it is well known that there is significant intraspecific variation in the content an potency of Alternaria alternata allergens, little data has been published on intraspecific variability for individual allergens from moulds. OBJECTIVE To assess the variability of Alt a 1 expression in different strains of A alternata. METHODS Eleven strains of A alternata were cultured in ...

1. By a suitable bactericidal technique, it can be demonstrated that the virulent S influenza bacillus is completely resistant to the bactericidal action of diluted normal unheated serum. In contrast, the R organism is easily killed when subjected to the action of diluted normal serum. Although this is not a true virulence test, it promises to be a useful substitute when a susceptible animal is...

In our previous study, we reported that a novel endophytic bacterium Bacillus oryzicola YC7007 has suppressed bacterial diseases of rice via induced systemic resistance and antibiotic production. This endophytic strain, B. oryzicola YC7007 was used as a biological control agent against bakanae disease of rice caused by Fusarium fujikuroi, and its mechanism of interaction with the pathogen and t...

In an attempt to improve immune responses and protective efficacy, we constructed two recombinant bacille Calmette-Guérin (rBCG) strains expressing an 85B antigen (Ag85B) and early secreted antigenic target-6 kDa antigen (ESAT6) of Mycobacterium tuberculosis (MTB) fusion protein. Both rBCG strains have the same protein insertion but in a different order (Ag85B-ESAT6 and ESAT6-Ag85B). The cultur...