Abstract: The present invention provides methods and compositions for the specific detection of Pseudomonas fluorescens and for the selective growth of this bacterium. In a preferred embodiment, selective growth of P. fluorescens is effected by the combination of Irgasan, carbenicillin and nitrofurantoin in a bacteriological medium comprising suitable nutrients for its growth. Also provided is a fast, reliable and economical method for the assessment of microbial quality of a fresh animal product, such as poultry, beef, fish, shellfish, milk or the like, using media selective for the growth of P. fluorescens and detection methods for microbial growth in the selective media.