Bushnell Haas Broth is recommended for the microbiological examination of fuels by the SIM Committee on microbiological deteriorations of fuels. . These media contain all nutrients except carbon source, necessary for the growth of bacteria. Only those bacteria that are able to decompose hydrocarbon will grow in these media. Specific carbon source i.e. hydrocarbon can be added to this medium and their utilization by different microorganisms can be studied.