Science blog posts

Not all cheese styles present the same microbial environment. Moisture content determines water activity, and water activity determines which organisms can be present and active.

Lactic acid bacteria acidify milk, suppress competing organisms, and build the flavor of aged cheese. Here is how all three mechanisms work and where each has limits.

Not all water in cheese is available to bacteria. Water activity rather than moisture content determines which pathogens can grow and how different cheese styles compare.

The same 60-day aging period that renders one batch of raw milk cheese safe can leave another infectious. For Salmonella, initial bacterial load is the variable that determines the outcome.

Unlike most dairy pathogens, Listeria monocytogenes thrives in the conditions that define aged cheese production. Cold tolerance, salt resistance, and biofilm formation explain why.

The lactic acid fermentation that eliminates most dairy pathogens triggers an adaptive response in E. coli O157:H7 that allows it to survive past 270 days in aged cheese.

Despite causing 1.5 million U.S. infections per year, Campylobacter rarely survives cheesemaking. Here is why oxygen, salt, and acid eliminate it reliably.

Raw milk cheese sold across state lines in the U.S. must be aged 60 days by federal law. Here is where that requirement came from and what it was designed to prevent.

Cheesemaking eliminates some pathogens reliably and leaves others largely intact. A science-based look at salt, water activity, lactic acid, and the 60-day aging rule.

One confirmed raw milk death in 15 years of federal surveillance. Cattle kill 22 Americans per year. Two numbers that are rarely considered together.

A 1946 map labeled Australia’s outback useless. Today it holds over a million feral camels and a growing camel milk dairy industry.

A UC Davis review of 37 studies found fermented dairy improved gut symptoms and inflammation, with no harmful effects reported.