Prevalence of Psychrotrophic Bacteria During Frozen Storage of Raw Milk

Incidence of psychrotrophic lipolytic bacteria in cow’s raw milk

The contamination of bulk samples of cow’s raw milk (n = 491) by psychrotrophic lipolytic bacteria (PLiBC), total count of psychrotrophic bacteria (PBC) and mesophilic bacteria (TBC) was monitored for two years on eight dairy farms and the correlations among these groups of bacteria were analysed. An increase in TBC, PBC and PLiBC and in the values of free fatty acids (FFA) was tested experimen...

Characterisation of Antibiotic-resistant Psychrotrophic Bacteria in Raw Milk

Effect of refrigeration on prevalence and enumeration of psychrotrophic bacteria in raw milk

Fifty milk samples were assessed for prevalence and enumeration of coliform bacteria under refrigeration. Refrigeration exerted profound effect conferring diminished growth of Citrobacter, Enterobacter and Serratia, however, itfavoured Salmonella, E.coli and Klebsiella on other hand. Among them, Salmonella appeared with highest load both in pre-refrigerated (23%) as well as post-refrigerated (4...

Trends of Antibiotic Resistance in Mesophilic and Psychrotrophic Bacterial Populations during Cold Storage of Raw Milk

Psychrotrophic bacteria in raw milk are most well known for their spoilage potential and cause significant economic losses in the dairy industry. Despite their ability to produce several exoenzyme types at low temperatures, psychrotrophs that dominate the microflora at the time of spoilage are generally considered benign bacteria. It was recently reported that raw milk-spoiling Gram-negative-ps...

Bacteria Counts in Raw Milk

There is little doubt that raw milk is the most scrutinized agricultural commodity. Appendix N of the Pasteurized Milk Ordinance requires that all bulk tank milk be tested for beta-lactam antibiotics. This document also sets the regulatory levels for somatic cell counts (SCC) and bacteria levels in raw bulk tank milk. Milk processors are required to perform the regulatory testing. Many progress...