Lesson plan
Lactococcus
Lactococcus, from Latin lac, meaning "milk", and Ancient Greek κόκκος (kókkos), meaning "berry", is a genus of lactic acid bacteria that were formerly classified as Lancefield group N streptococci. They are known as homofermenters meaning that they produce a single product, lactic acid in this case, as the major or only product of glucose fermentation. Their homofermentative character can be altered by adjusting environmental conditions such as pH, glucose concentration, and nutrient limitation. They are gram-positive, catalase-negative, non-motile cocci that are found singly, in pairs, or in chains. The genus contains strains known to grow at or below 7˚C.
Article summary
Lactococcus, from Latin lac, meaning "milk", and Ancient Greek κόκκος (kókkos), meaning "berry", is a genus of lactic acid bacteria that were formerly classified as Lancefield group N streptococci. They are known as homofermenters meaning that they produce a single product, lactic acid in this case, as the major or only product of glucose fermentation. Their homofermentative character can be altered by adjusting environmental conditions such as pH, glucose concentration, and nutrient limitation. They are gram-positive, catalase-negative, non-motile cocci that are found singly, in pairs, or in chains. The genus contains strains known to grow at or below 7˚C.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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