Micro Biology > QUESTIONS & ANSWERS > CCBC Microbiology 230-Summer 2022- QUIZ #4 (All)

CCBC Microbiology 230-Summer 2022- QUIZ #4

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CCBC Microbiology 230-Summer 2022- QUIZ #4 1. What is beta hemolysis? - ✔✔Beta hemolysis is a clear red blood cell free zone surrounding a colony. When you see this you know that there has been... complete lysis of the red blood cells. 2. What does gamma reaction refer to? - ✔✔Gamma reaction refers to when there is NO hemolysis or discoloration of the agar surrounding the colony. 3. What is alpha hemolysis? - ✔✔Alpha hemolysis is a zone of partial hemolysis surrounding a colony. It usually has a greenish discoloration on the agar. 4. What is double zone hemolysis? - ✔✔Double zone hemolysis refers to both beta and alpha zone hemolysis surrounding a colony. 5. The lancefield system is helpful in identifying what type of bacteria? - ✔✔The Lancefield system is useful identifying streptococci. There are 19 different serological groups within the Lancefield system. 6. What are two ways that streptococci can be identified? - ✔✔Through the Lancefield system and Serological typing. 7. What are the Lancefeild group of streptococcus that is the most common cause of acute streptococcal infections in humans? - ✔✔Streptococus pyogenes which is in the group A beta streptococci of the Lancefeild serological group is responsible for most acute human strep infections. 8. What are five Lancefield groups that frequrently causes human infections other then group A beta streptococci (streptococcus pyogenes) - ✔✔Group B streptococci (S. agalactiae) Gram positive Group C streptococci (S. equi, S. equisimillis and S. zooepidemicus) Group F streptococci (S. anginosus) Group G Streptococci9. What are the infections that group B streptococci (streptococcus agalactiae) cause? - ✔✔This streptococcus usually causes pneumonia, septicemia, or menigitis in infants and adults. Also associated with urinary tract infections, endometritis, infected ulcers. [Show More]

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