ETS Laboratories - Stuck and Sluggish Fermentation Panel

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2 Days

Stuck and Sluggish Fermentation Panel

NAME	UNITS	TECHNIQUE	METHOD

Acetic acid bacteria	cells/mL	Scorpions™	ETS Laboratories
The three genera of acetic acid bacteria detected are Acetobacter, Gluconobacter and Gluconacetobacter. Acetic acid bacteria are commonly associated with grapes and the winery environment. They are often introduced to the winery by coming in on contaminated fruit from the vineyard. Acetobacter can oxidize ethanol to produce acetic acid in the presence of oxygen. These organisms are often associated with elevated volatile acidity in wines and can rapidly spoil wine exposed to air during barrel aging.

L. brevis/hilgardii/fermentum	cells/mL	Scorpions™	ETS Laboratories
Lactobacillus brevis, L. hilgardii, L. collinoides, L. fructivorans, L. buchneri, and L. fermentum are lactic acid bacteria commonly found in wine. These obligate heterofermentive species of Lactobacillus have the ability to produce high levels of acetic acid in a short period of time – often in a matter of a few days. This can occur readily during sluggish or stuck fermentations. Many species have the potential to form diacetyl often causing undesired buttery flavors. Some species of these bacteria have also been implicated in the production of mousy flavor and/or biogenic amines.

L. casei/paracasei/mali/nagelii	cells/mL	Scorpions™	ETS Laboratories
Lactobacillus casei, L. paracasei, L. mali, L. nagelii, are lactic bacteria occasionally found in wine. These species of Lactobacillus do not have the ability to produce acetic acid from the glucose and fructose found in wine. Many species have the potential to form diacetyl often causing undesired buttery flavors. Some species of these bacteria have also been implicated in the production of mousy flavor and/or biogenic amines.

Lactobacillus plantarum	cells/mL	Scorpions™	ETS Laboratories
Lactobacillus plantarum is a lactic bacteria occasionally found in wine. This species of Lactobacillus is a facultative heterofermenter and does not have the ability to produce acetic acid from the glucose and fructose found in wine. Many species of Lactobacillus have the potential to form diacetyl often causing undesired buttery flavors. Some species of these bacteria have also been implicated in the production of mousy flavor and/or biogenic amines.

Oenococcus	cells/mL	Scorpions™	ETS Laboratories
Oenococcus is the most commonly used lactic acid bacteria for conducting malolactic fermentation. Although Oenococcus is not generally considered a spoilage organism, it has the ability to produce high levels of acetic acid in stuck or sluggish fermentations.

Pediococcus species	cells/mL	Scorpions™	ETS Laboratories
Pediococcus damnosus, P. parvulus, P. pentosaceus, and P. inpoinatus are lactic acid bacteria often found in wine. Pediococcus prefer elevated pH, and wines with pH in excess of 3.7 are at risk for high levels of Pediococcus growth. Some species of Pediococcus may produce polysaccharides that cause undesirable texture defects. Most strains of Pediococcus are capable of generating biogenic amines, such as histamine putrescine and cadaverine, under favorable conditions. Although biogenic amines are not currently regulated in the United States, many companies that import wines into Europe are beginning to require biogenic amines analysis on imported wines.



	The Stuck and Sluggish Scorpion Panel detects bacteria that can cause problems, especially formation of volatile acidity, during stuck or sluggish fermentations. The lactic acid bacteria, including many species of Lactobacillus and strains of Oenococcus, can produce high levels of acetic acid in the presence of levels of glucose and fructose normally found in problematic fermentations. Early detection enables intervention to remove the bacteria before they can have a negative impact on the wine. For more information on Scorpion analysis, please Click Here.

MINIMUM VOLUME	CONTAINER TYPE	OTHER

60 mL

NUMBER OF SAMPLES SUBMITTED We achieve economies of scale here at ETS based on the volume of samples processed at a given time. As a consequence we are pleased to pass these savings on to our customers, offering discounts for multiple sample submissions. These discounts apply only to samples submitted at the same time.	1	2-10	11+

Fee Per Sample	$100.00	$97.00	$95.00