Chlamydiaceae, Mycoplasma and Ureaplasma

Question 1

Describe the gram staining results of Chlamydiaceae.

Answer 1

These are GRam negative, but won’t show up on a gram stain as they don’t have peptidoglycan in their cell wall. Thus they aren’t responsive to beta-lactams

Question 2

What are the 3 species of Chlamydiaceae of pathogenic importance?

Answer 2

Chlamydia trachomatis
Chlamydophila pneumoniae
Chlamydophila psittaci

Question 3

What 3 diseases does Chlamydia trachomatis cause?

Answer 3

Chlamydia - the world’s most common STD
Ocular trachoma
LGV - Lymphogranuloma venereum

Question 4

What does Chlamydophila pneumonia cause?

Answer 4

Pneumonia

Question 5

What does Chlamydophila psittaci cause?

Answer 5

Causes parrot fever in birds, and zoonotic psittacosis in humans.

Question 6

What are the 3 genital mycoplasmas?

Answer 6

Mycoplasma hominis (P.I.D)
Ureaplasma urealyticum
Mycoplasma genitalium

All cause urethritis.

Question 7

Which genuses are too small to be observed under a microscope?

Answer 7

Mycoplasma and Ureaplasma.