Microbiology Flashcards
prevalence of IE
2-6 per 100,000
mortality of IE
without treatment
with treatment
100%
20%
most common fungus IE in IVDU
Candida tropicalis
classic cause of culture negative IE
Q fever (coxiella burnetti)
why is Q fever culture negative
it is an obligate intracellular bacteria
how are we infected by Q fever
spores from dogs, cattle, sheep, goats.
IE types diagnosed by PCR from tissue
T. whipplei
Bartonella
most common murmur in IE
aortic regurg
classification for diagnosing IE
Durack
2 major - echo or culture
1 major 3 minor
5 minor - stigmata, predisposition or fever
which viral hepatitis don’t have vaccine
C
E
chronicity of HBV in children and adults
90%
5%
treatment of HBV
interferon and lamivudine (reverse transcriptase i)
treatment of HCV
interferon and ribavirin (RNA transcriptase i)
uncommon sources of hepatitis
adenovirus
cytomegalovirus
EBV
HSV
serological markers in HBV
1 month = HbsAg
2 month = anti-core and HBeAg
3 month = anti-HBe
6 month = anti-HBs
immune clearance phase of HBV
ALT goes up
definite of sepsis
SOFA score >=2 (goes from 0-4)
definition of SIRS
temp >38 or <36 HR >90 BP <90/60 Glucose >7 WCC >12 RR >20 AMTS <8/10
cytokines in massive peak of inflammation in sepsis
TNF
IL1
IL6
cytokine in immunosuppression phase
IL10
measles
florid maculopapular rash (starts behind ears and spreads)
conjunctivitis
koplik spots
notifiable
rubella
aka german measles
togovirus
rash starts on face and then spread but fades after 3-5 days
sub-occipital and postauricular lymphadenopathy
arthritis is a complication
mumps
no rash
parotitis
meningitis, orchitis and pancreatitis is complications
antivirals we have against flu
neuraminidase inhibitors (an enzyme that lets viruses slip in and out of cells) oseltamavir and zanamivir
when are these antiviral seffective
within 48 hours of symptoms
amoxicillin taste
BANANANANANANAS
YOUNGS SYNDROME
azoospermia, bronchiectasis, rhino sinusitis (due to primary ciliary dyskinesia)
kartagners syndrome
same as young’s + dextrocardia
definition of chronic bronchitis
cough for >3 months for at least 2 years
most typical CAP
strep pneumoniae
active TB treatment
2 months RIPE
4 months RI
rifampicin, isoniazid, pyrinzamide, ethambutol
latent TB treatment
3 months RI
meningeal TB treatment
12 months of treatment + steroids
incubation and presentation: b cereus
vomiting or diarrhoea
1-6 hours
incubation and presentation: s aureus
rapid vomiting
1-6 hours
incubation and presentation: salmonella
watery brown diarrhoea
12-48 hours
incubation and presentation: e.coli
watery brown diarrhoea
12-48 hours
incubation and presentation: shigella
dysentry + vomit
48-72 hours
incubation and presentation: campylobacter
flu-like prodrome followed by ?bloody diarrhoea
48-72 hours
incubation and presentation: giardiasis
gradual onset prolonged >week brown diarrhoea
>7days
incubation and presentation: amoebiasis
gradual onset prolonged >week bloody diarrhoea
>7 days
hypnozoites
P. ovale, P.vivax
leishmaniasis
sandflies
infect dogs too
trypanososmiasis
tsetse –> sleeping sickness Africa
Rejuvid bug –> chagas MO,MC,CM
treatment of trypanosomiasis
arsenic derivatives
schistosomiasis in liver
S. japonicicum. S. mansoni
schistosmiasis in bladder
S. haemotobium
Urine sample for schistosmiasis
terminal urine at midday
hydatid disease cause
echinococcus tapeworm
prevention of neutropenic sepsis
prophylactic ciprofloxacin for period of most vulnerability (7-12 days after chemo)
rhino cerebral infection
mucormycosis (mould)
pathogen for osteomyelitis
adult
newborn
s. aureus
group B strep (from vagina)
early PJI
<3 months
presentation of PJI
rarely with systemic upset
usually new joint becomes stiff and uncomfortable
2 stage replacemtn
out
6 weeks of Abx
in
ecthema
secondary to insect bites
erisipelas
only one cause by group A strep NOT S.aureus
it is a superficial and more circumscribed form of cellulitis
types of necrotising fasciitis
1 = polymicrobial 2 = group A strep
anti-streptolysin O
enzyme for haemolysis in group A strep (can test for it in the lab)
who is at risk of anthrax
tanners, wool workers, vets, farmers