Microbiology Flashcards
Name 4 important intrauterine infections
rubella
parvovirus b19
VZV
CMV
(herpes HIV HEPb)
what causes rubella
RNA virus with respiratory spread. togaviridae family
name 5 routes of CMV transmission
Saliva, blood, sexual, intrauterine, perinatal eg breastfeeding
Main problem assocaited with intrauterine CMV infection
Accounts for 20% of sensory- neural hearing loss
What viruses would you be suspecting in a child scan of foetal microcephaly
CMV and rubella, zika?
What is the treatment for a pregnant woman with chicken pox
aciyclovir
What mosquito transmits malaria
anopheles
what mosquito transmits dengue
aedes
How would HIV present in a returning traveller
pharyngitis, like mononucleosisby EBV or CMV
How does rickettsial disease present?
Fever, myalgia and headache and vasculitis as it invades the endothelial cells and may have an eschar from the bite
what organism causes rickettsial disease
tics, lice mites, scrub typhus causes chiggers
how do you treat rickettsia
doxy
how do you diagnose cysticercosis
see brain abcess with a fluid level, often walled off by bone. commonest cause of adult onset epilepsy.
how do you treat cysticercosis
cestocidal drugs and steroids (e.g praziquantel)
what is the largest risk factor for TB
HIV but most tb attributable to malnutrition
What causes african sleeping sickness
trypanasoma brucei (rhodesiense (east) and gambiense (west))
east - more severe and results in death
west indolent present late with psych conditions - posterior lymphadenopathy
present with chancre
how is trypanosoma transmitted
tsetse fly
how is leishmaniasis transmitted
sand flies
what causes american ‘sleeping sickness’
chagas disease or trypanosoma cruzi
what organism causes thread worm
enterobius vermicularis
treatment = mebendazole
ascending lymphangitis
sporotrichosis
what causes sporotrichosis
sporothrix schenckii
what 2 infections can be diagnosed with a urinary antigen test in CAP
legionella and strep. pneumoniae
boat shaped organism
pneumocystis jirovici
cold aglutinin test
mycoplasma pneumonia
atypical but common.
At risk of SJS(10% skin coverage or toxic epidermal necrolysis when over 30%) and AIHI
erythema multiforme
myalgia common
Causes of erythema multiforme
Target lesions
HSV
Mycomplasma
Malignancy
others
Causes of TEN/SJS
PCPC CANALSS
Phenytoin carbamazepine Peniciliin cephalosporins ciprofloxacin Allopurinol NSAIDS ART Lamotrigine Sulphonamides Sertraline
what is herpangina
small vesicles in the roof of the mouth typically seen in hand foot and mouth - cocksackie A
what is exanthem subitum
roseola infantum - hhv6
causes of acute necrotising encephalitis
viruses and herpes in questions?
What is hairy leukoplakia and what causes it?
white patches on the sides of the tongue, presenting on a corrugated tongue. (pale rigid lesions)
presents due to EBV in immunosuppressed individuals
can give aciclovir
contraindications to the influenza virus:
egg allergy? query
haemophiliacs and those in receipt of regular transfusions of blood should be offered which vaccine primarily
hep b
common causes of PUO
infection 25%, neoplasms, connective tissue disease, others
Common classical PUO causes
Abcess
Endocarditis
TB
complicated UTI
dont forget travel history.
4 stages of syphilis infection
primary - chancre
secindary - macular papular rash and malaise, snail track oral ulcers
latent - no symptoms
tertiary - gumma - granulomas, cardiac aortitis, neurosyphilis - spirochaetes in csf.
What causes visible genital warts
HPV 6/11 gardasil immunises against 6,11,16,18
podophylotoxin for home treatment
cryotherapy or imiquimod
which vaccine is given to a child at birth if the mother is at risk of transmitting?
Hep B
halo sign on x ray
fungal infections typically aspergillosis
urinary NAAT
chlamydia
wet slide prep
trichomoniasis - discharge only
flagilated protozoan t. vaginalis
grey film over epiglottis? vaccine prevention
Diptheria? pseudomembrane over tonsils, huge neck?
causes lumps on parotid and neck
mumps
macular papular ash on face that can cause encephalitis and pneumonitis
measles
lockjaw? vaccine prevention
tetanus?