Chapter 5

Question 1

gram-positive

Answer 1

-resists decolorization and retains purple stain

Question 2

gram-negative

Answer 2

-can be decolorized and stains red

Question 3

staphylococci

Answer 3

• gram-positive cocci arranged in grapelike clusters

- normal inhabitants of skin and nasal cavitiy

Question 4

streptococci

Answer 4

• gram-positive cocci arranged in chains or pairs

- normal inhabitants of skin, mouth, pharynx, gut, female genital tract

Question 5

chlamydiae

Answer 5

• gram-negative, nonmotile bacteria
• no vaccine
• causes nonspecific urethritis

Question 6

pinworms

Answer 6

• small roundworm that migrates out of colon thorugh the anus while the infected individual is asleep
• deposits eggs on the perianal skin
• frequent in children and spreads through a family

Question 7

scabies

Answer 7

-small parasite burrows in the superficial layers of the skin, where it lays egg that hatch in a few days

Question 8

crab louse

Answer 8

• lives in anal and genital hairs

- causes intense itching