obligate intracellular bacteria

Question 1

mycoplasma

Answer 1

smallest free living prokaryotic microorganisms, facultative anaerobes
- lack cell walls (gram staining not useful)

Question 2

mycoplasma pneumoniae transmission

Answer 2

respiratory droplets (causes lower resp tract infection)

Question 3

diagnosis and treatment of mycoplasma pneumoniae

Answer 3

IgM-specific antibody titer is diagnostic

Question 4

mycoplasma mycoides

Answer 4

highly contagious disease called contagious bovine pleuropneumonia (transmission by aerosols with a high mortality rate)

Question 5

sign of mycoplasma mycoides postpartum

Answer 5

pneumonic lungs will show marbling

Question 6

cell membrane of mycoplasma species

Answer 6

sterol- containing lipid bilayer

Question 7

where do chlamydiaceae grow?

Answer 7

cytoplasmic vacuoles in a limited number of host cell types

Question 8

are chlamydiaceae gram - or +

Answer 8

negative

Question 9

chlamydiae possess ______ and synthesize their own _______

Answer 9

ribosomes, protein

Question 10

reproductive cycle of chlamydiaceae

Answer 10

1) the elementary body is taken up by phagocytosis into susceptible host cells
2) the elementary particle reorganizes into a larger, noninfectious reticulate body
3) the reticulate body divides repeatedly by binary fission, forming inclusion bodies
4) after 48 hours, multiplication ceases and reticulate bodies condense, becoming new, infectious elementary bodies
5) elementary bodies are then released from the cell by cytolysis, ending in host cell death

Question 11

chlamydia trachomatis

Answer 11

infections of the conjuctiva or genital tract which vary depending on the biovar involved

Question 12

trachoma

Answer 12

progressive conjunctivitis with inflammation and scarring leading to blindness

Question 13

genital biovars

Answer 13

most common form of sexually transmitted urethritis, cervicitis, and salpingitis

Question 14

lymphogranuloma venereum biovars cause

Answer 14

localized, ulcerative genital lesions with spread to regional lymph nodes

Question 15

trachoma

Answer 15

spread by direct contact with the eye, nose, throat secretions from affected individuals, or contact with fomites

Question 16

neonatal conjunctivitis

Answer 16

swelling of eyelids, hyperemia and purulent discharge beginning 2-30 days after birth

Question 17

infant pneumonia

Answer 17

rhinitis 2-3 wks after birth and a distinctive staccato cough, no feverc

Question 18

community acquired respiratory infection is caused by

Answer 18

chlamydia pneumoniae

Question 19

community acquired respiratory infection causes

Answer 19

pharyngitis, laryngitis, bronchitis, sinusitis, or interstitial pneumonia

Question 20

psittacosis is caused by

Answer 20

chlamydia psittaci

Question 21

how is psittacosis transmitted

Answer 21

through inhalation of contaminated dust containing bird feces

Question 22

what does psittacosis affect

Answer 22

lower resp tract, causing fever, dry cough, flu like symptoms & patchy pulmonary infiltration

Question 23

rickettsiaceae

Answer 23

obligate intracellular gram- negative bacilli
- cell walls contain peptidoglycan
only grow inside living host cells

Question 24

rickettsiaceae causes

Answer 24

systemic diseases that are mainly arthropod borne in humans and animals

Question 25

rocky mountain spotted fever organism

Answer 25

rickettsiaceae rickettsii

Question 26

rocky mountain spotted fever vector

Answer 26

tick

Question 27

rocky mountain spotted fever clinical features

Answer 27

inward- spreading macular rash (abrupt onset)

Question 28

epidemic typhus orgnaism

Answer 28

rickettsiaceae prowazekii

Question 29

epidemic typhus vector

Answer 29

lice (defecate while feeding and they also die from the infection)

Question 30

epidemic typhus clinical features

Answer 30

arthralgia; outward spreading macular rash - abrupt onset

Question 31

endemic typhus organism

Answer 31

rickettsiaceae typhi

Question 32

endemic typhus vector

Answer 32

flea (rat flea xenopsylla cheopsis)

Question 33

endemic typhus clinical features

Answer 33

gradual onset of fever, headache, myalgia, and cough; maculopapular rash on trunk

Question 34

rickettsial pox organism

Answer 34

rickettsiaceae akari

Question 35

rickettsial pox vector

Answer 35

mites

Question 36

rickettsial pox clinical features

Answer 36

generalized papulovesicular rash accompanied by sloughing - abrupt onset

Question 37

human monocytic ehrlichiosis (HME) caused by

Answer 37

ehrlichia chaffeensis

Question 38

human monocytic ehrlichiosis (HME) vector

Answer 38

lone star tick

Question 39

human monocytic ehrlichiosis (HME) clinical signs

Answer 39

acute fever, myalgia, leukocytopenia and thrombocytopenia

Question 40

human granulocytic anaplasmosis (HGA) caused by

Answer 40

anaplasma phagocytophilum

Question 41

human granulocytic anaplasmosis (HGA) vector

Answer 41

deer and dog tick

Question 42

human granulocytic anaplasmosis (HGA) clinical signs

Answer 42

more severe fever, myalgia, leukocytopenia and thrombocytopenia

Question 43

Q fever organism

Answer 43

coxiella burnetti

Question 44

coxiella burnetti gram stain

Answer 44

poor. better stained with giemsa or gimenez stains. gram negative

Question 45

q fever

Answer 45

zoonotic from cattle, sheep, and goat - airborne transmission to farm workers, vets