Mycoplasma and More Flashcards
Mycoplasma characterisitcs
can grow in cell free media
contains RNA and DNA
cell wall deficient (lacks a rigid cell wall)
requires sterols for growth
M. pneumoniae causes
tracheobronchitis
pneumonia limited to respiratory mucousa
mild hemolytic anemia
M. pneumoniae treatment
erythromycin, tetracycline or quinolones
M. Hominis causes
painful urination, unusual discharge and painful intercourse
M. Hominis treatment
erythromycin and zithromax
M. Genitalium causes
nongonococcal urethritis (NGU)
pelvic inflammatory disease PUD
cervicitis
M. Genitalium treatment
azithromycin
Ureaplasma urealyticum causes
nongonococcal urethritis, prostatitis, UTI, penile discharge
infertility, chorioamnionitis, stillburth, premature birth
pneumonia and meningitis
Ureaplasma urealyticum treatment
doxycycline
How to identify species of Mycoplasma?
cyctochek test kit identifies species
microarray based
Chalmydiae characteristics
obligate intracellular parasites
aerobic, nonmotile, rod/coccoid
forms elementary bodies
Chlamydiae cell wall characteristics
LPS layer, NO peptidoglycan
resembles gram negative but difficult to stain
Chlamydiae typically causes
genital, ocular, and respiratory infections
trachoma infections of the eyes
elementary bodies
chalmydiae
small extracellular infectious particles that resemble spores
cannot grow or divide
Chlamydia trachomatis causes
LGV (lymphogranuloma), STIs, pelvic inflammatory diseases, ectopic pregnancy
Bubos like Y. pestis
C. pneumoniae causes
pneumonia, bronchitis, pharyngitis
Natural host of C. pneumoniae
humas
C. psittaci causes
pulmonary infections (psittacosis)
C. psittaci natural host
birds, lower mammals
Diagnosis method for Chlamydia
Nucleic acid amplification tests (NAAT)
PCR
NAAT is most commonly used to screen for
C. trachomatis
treatment for C. trachomatis
azithromycin
multiple doses of doxycycline
erythromycin for pregnant women (that can’t take doxy)
Rckettsiae characteristics
obligate intracellular parasites
arthropod borne
zoonoses
Rickettsiae rickettsiae
Rocky Mountain spotted fever
causative agents vascular endothelial cells lead to vascular damage
Coxiella burnetii (Rickettsiae)
Q fever - manifests as pneumonia
human monocytotropic ehrlichiosis
cattle, sheep, goats, livestock and cats
Mycology
diverse heterogenous group of eukaryotes
superficial mycoses
common fungal infections limited to the skin and skin structures
ringworm, tineas
Superficial mycoses treatment
miconazole, nystatin and griseofulvin (topicals)
subcutaneous mycoses
group of fungal diseases that involve lymphatics, dermis, subcutaneous tissues and muscles
fungi implanted in the skin
subcutaneous mycoses causes
chromoblastomycosis, maduromycosis, sporotrichosis
opportunistic mycoses
not true pathogens
only in immunosuppressed patients