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.
1 Be aware that testing for Salmonella spp. in food using the cultural method in the BAM (or similarly validated method) can yield one of three results: 2  A presumptive positive result, which is a preliminary result that may or may not ultimately yield a confirmed positive result (i.e., it may yield a negative result).