Bacteriology at UW- Madison

Support Lactococcus lactis as the Wisconsin State Microbe


    
Conversion of milk to cheese requires a microorganism, Lactococcus lactis, which has been nominated as Wisconsin's State Microbe.

We support adoption of this state symbol in the company of the state animal, the state bird, state flower, state fish and insect.


Wisconsin state animal - Taxidea taxus Go Badgers!


Wisconsin state flower - Viola papilionacea wood violet

The bacterium, Lactococcus lactis, is a living symbol of an organism that reflects the culture and heritage of Wisconsin’s peoples and yet contributes mightily to the state’s economy.


Wisconsin state microbe - Lactococcus lactis

Having a state microbe will inform people about the value of microbes to Wisconsin’s industries and economy, and bring focus to Wisconsin’s preeminence in microbiology research, education and application.
 
Lactococcus lactis is intimately involved in production of the food that makes Wisconsin famous: CHEESE. The microbes are needed in cheese production for fermentation of milk sugar (lactose) to lactic acid, formation of flavor and aroma compounds, and development of ripened cheese texture.


Lactococcus lactis is classified as a lactic acid bacterium. It is naturally found with grasses and dairy products. The microbe is responsible for the production of many varieties of cheese, including Cheddar, Monterey Jack, Gouda, Edam, Muenster, Feta, Blue, Gorgonzola, Brie, Camembert, Havarti, and Colby, a Wisconsin original. Other dairy products, such as cultured butter, cottage cheese, cream cheese, sour cream, kefir and buttermilk also use the microbe in their manufacture.
 

Wisconsin is the leading producer of cheese in the U.S. The state produces 2.5 billion lbs of cheese annually.

 
  
90 percent of Wisconsin milk is used to make cheese. This translates to cheesemaking's contribution of over $18 billion annually to the Wisconsin economy, twice the value of citrus to Florida, and 7-times the value of potatoes to Idaho.


Wisconsin state domestic animal - Bos taurus

Lactococcus lactis is also the predominant organism in starter cultures that are used nationwide for production of a wide variety of fermented dairy products. Wisconsin is the leading manufacturer of L. lactis starter cultures in the U.S., and these manufacturers are a significant component of the vibrant Wisconsin dairy ingredient industry.


Adding starter culture to pasteurized milk initiates the cheesemaking process.

Lactococcus lactis is arguably the most important microbe of any type in the State’s economy. While we have lost our status as the #1 dairy state, thanks to L. lactis we have maintained our position as #1 cheese-producing state. It is L. lactis that adds tremendous value to our dairy products, doubling or tripling the value of raw milk.



It is likely that no other state’s economy relies so heavily on such a microbe, so it is fitting that Wisconsin is the first state in the U.S. to name a State Microbe. In this era in which the awareness and appreciation of microorganisms is growing and when L. lactis is fueling the increased consumer demand for cheese, it is appropriate to recognize this bacterium’s position and value in the State of Wisconsin by naming it the State Microbe.

Learn more about Lactococcus lactis, the cheese bacterium nominated as Wisconsin's state microbe.

Lactococcus lactis, Wisconsin's State Microbe (HTML)

Lactococcus lactis, Wisconsin's State Microbe (PPT)

Cheese statistical data from the Wisconsin Milk Marketing Board (PPT)

High resolution scanning electron micrographs of Lactococcus lactis by Joseph Heintz, University of Wisconsin-Madison.

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