Isolated thunderstorms are when there are either thunderstorms present at the current time or there is a change for them to form, but they are scattered. These usually occur in the afternoon and the evening when the sun is out at its peak and heats up the atmoshpere.
For example, bacteria from the genus Salmonella are mostly facultative anaerobes, oxidase-negative, catalase-positive and gramnegative rods. Most strains are motile and ferment glucose with production of both acid and gas.
Also, Bacillus spp. are catalase-positive, while lactobacilli are not. Colony morphology of Bacillus spp. is highly variable, often growing as large to very large gray-white colonies that may be dry in appearance, or which may produce a contiguous mat of wet, blistery colonies.