Flashcards in Prof's Review ques Deck (24)
WHO top 10
Acute respiratory infections - 3.5 mn
Diahhreal diseases - 3.1 mn
AIIDS - 1.8 mn
TB -1.3 mn.
Malaria 0.66. mn.
who developed the rabies vaccine -
what is a genus
2 or more species with similar morphology
what is a genus
group of organisms with similar genetics
what is typical size for humans??
typical size of bacterium?
1-5 micro meter
typical size of virus?
rod shaped = bacillus
sherpical or round - coccus
curve or wavy - curved rod = vibrio
flexible wave - spirochete
rigid wave - spirilum
stain all bacteria same color
Difference between spirochete and spirilum
spirochete - flexible wave
spirilum - rigid wave
Gram stain (+ve) - S.Aureus
purple -->blue purple (after adding iodine)-->remains blue purple -->(after alcohol wash) -->remains blue purple -->(after adding sarfarin)
Gram stain (-ve) E.Coli
purple -->blue purple (after adding iodine)-->looses stain -->(after alcohol wash) -->orange red -->(after adding sarfarin)
which staining technique is most effective?
Gram +ve cell structure
thicker cell wall and thin cell membrane
thicker cell wall structure makes it nonrespondent to alcohol
Gram -ve cell structure
have two membranes but are very thin and allows the alcohol to penetrate and wash the stain
what is gram +ve susceptible to?
penicillin (only thing that can destroy the cell wall)
gram -ve susceptible to?
Acid fast stain
used to identify mycobacteria (TB and leprosy)
key differences between gram +ve and -ve
-no outer membrane
-outer membrane persent (periplasmic region)
steps of animal virus replication
fusion uncoating and budding
steps of viral growth and replication
attachment, penetration,uncoating,biosynthesis,maturation and release
steps that are missing in viral replication
fusion and budding