Psychrotrophs in milk and some milk products with special- reference to its foodborne pathogens

biological contamination calidad contaminación biológica contamination biologique dairy hygiene higiene de la leche hygiène du lait lait leche micro-organisme psychrophile microorganismos psicrofilos milk milk products productos lácteos produit laitier pseudomonas psychrophilic microorganisms public health quality qualité salud pública santé publique