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General Microbiology - 3 Questions
What is a key characteristic of the colonies formed by Streptococcus pneumoniae?1) Dome-shaped2) Initially dome-shaped, later draughtsman colonies3) Granular turbidity with a powdery deposit4) Not typically seen in culture
Streptococcus pneumoniae colonies are initially dome-shaped and later develop draughtsman colonies.
Which test uses live Treponema pallidum as the antigen?
1) TPA test
2) TPI test
3) FTA test
4) TPHA test
TPI test: The Treponema pallidum immobilization (TPI) test involves using live T. pallidum as an antigen to detect antibodies in the patient's blood serum.
What is the purpose of using aluminum hydroxide as an adjuvant in the hepatitis B vaccine?1) To increase the immunogenicity of the vaccine2) To prevent bacterial contamination3) To enhance the stability of the vaccine4) To reduce the amount of antigen needed for immunization
Aluminum hydroxide is used as an adjuvant in the hepatitis B vaccine to increase the immunogenicity of the vaccine, enhancing the body's immune response to the antigen.