It is found that around 700 strains of bacteria can thrive inside your car at different locations. Bacteria like Staphylococcus, Propionibacterium, Bacillus, Actinomyces, Corynebacterium, and fungi like Penicillium, Alternaria, Aspergillus, and Cladosporium can be found in a car. Thus, give your car a thorough cleanse from time to time.