ch 20 Chlamydiae, rickettsiae and mycoplasmas

Question 1

what kind of parasites are chlamydiae?

Answer 1

obligatory intracellular

Question 2

what are some charecteristics of chlamydiae?

Answer 2

DNA, RNA, visible with light microscopy, sensative to tetracycline,erythromycin, sukohonamides

Question 3

what are the 3 main groups of chlamydiae?

Answer 3

C. trachomatis, C. pneumonia, C. psittaci

Question 4

what are some effects of chlamydia?

Answer 4

ocular infections, STD, pneumonia in neonates

Question 5

what kind of parasites are rickettsiae?

Answer 5

obligatory intracellular , best known for typhus

Question 6

how is ricketssiae transmitted?

Answer 6

bites of infected arthropods

Question 7

name the 2 genera of rickettsiae

Answer 7

rickettsia and coxiella

Question 8

what two things can rickettsiae rickettsia cause?

Answer 8

typhus- transmitted by a rat flea. Causes a maculopapular rash with a high fatality rate
spotted fever like rocky mountain spotted fever and other tick borne fevers

Question 9

what does rickettsiae coxiella cause?

Answer 9

Q fever which presents as a non-bacterial pneumonia

Question 10

whats unique about mycoplasms?

Answer 10

theyre the smallest prokaryote capable of binary fission

Question 11

what is missing in the mycoplasms cell wall?

Answer 11

peptidoglycan wall, this is why it is pleomorphic

Question 12

what can mycoplasmas cause?

Answer 12

pneumonia, atypical pneumonia, mucocutaneous eruptions, haemolytic anaemia

Question 13

whats primary atypical pneumonia?

Answer 13

fever, non-productive cough, headache, weak and tired

Question 14

what are mucocutaneous eruptions?

Answer 14

skin rashes and ulcerations of both oral and vaginal mucosa. Skin lesions have target appearance . In oral mucosa erythematous patches appear first and become bullous and erosive.

Question 15

whats steven-johnson syndrome?

Answer 15

when oral ulceration is associated with the skin rash and conjuctivitis