Microbiology Flashcards
Grape-bunch clusters
Staph aureus
Sensitive to optochin
Strep pneumoniae
Resistant to optochin
Strep viridans
Virus causing clumsiness, weakness, vision changes in “recent transplant”
JC Virus (causing Progressive Multifocal Leukoencephalopathy)
Recent transplant = immunosuppresed
Virus in bone marrow transplant patient
Adenovirus
Fever, malaise, raised ALT in person coming from India
Hepatitis A
Illness in person who had “transfusion long time ago”
Hepatitis C
Mutation allowing Spanish Flu and H5N1 to enter humans and mess us up
PB2 Mutation
Blueberry muffin rash
Congenital Rubella Syndrome
Slapped Cheek Syndrome
Parvovirus B19 (erythema infectiosum = Fifth Disease)
Most common valve affected in endocarditis in IV drug users
Tricuspid (valve connecting right atrium to right ventricle)
Ischaemic tongue
Giant Cell Arteritis
Temporal artery biopsy
Giant Cell Arteritis
Rusty colour sputum
Strep pneumonia
Gram +ve diplococci
Pneumonia in COPD patients
Haemophilus influenzae
Gram -ve cocci
Pneumonia after viral infection
Staph aureus
Gram +ve grape-bunch clusters (cocci)
Pneumonia after old AC system (“hotel room”)
Legionella - due to stagnant water
Gram -ve rod
Pneumonia with erythema multiforme
Mycoplasma pneumoniae
Pneumonia from farm animals
Coxiella burnetti (Q Fever)
Pneumonia after bird exposure
Chlamydia psittaci
Pneumonia in alcoholic (causes haemoptysis)
Klebsiella
Gram -ve rod
Bugs after splenectomy
Encapsualted organisms = strep pneumonia, haemophilus, neisseria
Ground-glass shadowing and “bat’s wing” appearance on CXR
Pneumocystis Jirovecii (PCP) Desaturates during 6-min walk test
Form of malaria when mosquito injects into blood
Sporozite
Aedes mosquito causes what?
Dengue (flavivirus)
Blanching rash, which looks like “islands of white in sea of red” in recovery phase
Dengue
Rose spots
Typhoid
Atypical lymphocytosis
Infectious Mononucleosis (EBV)
Target-shaped rash with central fading
Lyme Disease (borrelia burgdoferi)
Food poisoning from chickens
Campylobacter
Bug from cat scratches
Bartonella
Bug from unpasteurised milk
Brucellosis
Bug from dog bites
Lyssa virus (= rabies)
Sight of water causes convulsions and paralysis
Rabies
Nematode that pops out when have fever/anaesthetic
Ascaris (most common helminth)
Nematode causing protracted eosinophilia
Filariasis
Ghon Complex on CXR
Latent TB (Ghon Complex resolves to Ghon Focus = scarring and calcification)
Sudden-onset flank pain, radiating to groin
Spinal TB
Stain used for Acid Fast Bacilli test
Auramine or Ziehl-Neelson
Agar used for TB culture
Lowenstein-Jensen medium
TB drug causing optic neuritis
Ethambutol
TB drug causing lucozade secretions
Rifampicin
TB drug causing you to get pregnant on OCP
Rifampicin (increases hepatic metabolism of other drugs)
TB drug causing peripheral neuropathy
Isoniazid
Fungal infection of lung in AIDS patients
Cryptococcus
Halo Sign on chest CT
Aspergillus
Air Crescent Sign on chest CT
Aspergillus
Antifungal causing nephrotoxic
Polyenes (like Amphotericin B)
Antifungal interacts with warfarin
Azole (interacts with human P450 enzymes)
Tumbling motility
Listeria
India ink stain
Cryptococcus
Meningitis bug found in eggs/cheese/mayo
Listeria
Gas gangrene in infected wounds
Clostridium pefringens
Pneumonia after travelling from abroad (Mexico)
Mycoplasma
Bitten by another man. Wound becomes pus and foul-smelling
Anaerobes
GI infection after eat reheated rice
Bacillus cereus
Gram +ve rod
GI infection after BBQ
Salmonella enteritidis
Rice-water stool
Vibrio cholera
Gram -ve comma shaped
GI infection after Canned and vacuumed foods
Clostridium botulinum
GI infection if less than 1 year old eats honey
Clostridium botulinum
GI infection after eat refrigerated food (especially sandwiches)
Listeria
Beta-haemolytic anaerobic Gram +ve rods
Traveller’s Diarrhoae
ETEC (Enterotoxigenic E. Coli)
GI infection after sushi (undercooked seafood)
Vibrio parahaemolyticus
GI infection with foul-smelling diarrhoae
Campylobacter
Gram -ve curved
GI infection causing cellulitis in shellfish handlers
Vibrio vulnificus
GI infection causing Guillan-Barre Syndrome
Campylobacter
Gram -ve curved
Protozoal GI infection causing flask-shaped ulcer
Entamoeba histolytica
Protozoal GI infection causing pear-shaped trophozites, foul-smelling stool and flatulence
Giardia lamblia
Protozoal GI infection from swimming pools
Cryptosporidium parvum
Protozoal GI infection diagnosed using string test
Giardia lamblia
Most common diarrhoea in infants
Rotavirus
Persistent bone pain, with chronic overlying infection (diabetic ulcers)
Osteomyelitis
Pulvinar Sign on MRI
Variant Creutzfeldt-Jakob Disease
- seen in young only
Cause of UTI in young women
Staph saprophyticus
Organism causing staghorn calculi
Proteus mirabilis (causes recurrent UTI)
Clue cells on microscopy
Bacterial vaginosis
STI with thin white vaginal discharge
Trichomonas vaginalis
GUM disease caused by excessive douching
Bacterial vaginosis
Chocolate agar medium used to diagnose this STI
Chancroid = haemophilus ducreyi
Whiff Test
Bacterial vaginosis (get fishy smell when add hydrogen peroxide to sample)
What causes Roseola Infantum?
HHV6
Long-term prophylactic treatment for post-splenectomy patients
Penicillin V
Returned from Mediterranean with undulant fever
Brucellosis
Ulcerating papule, with necrotic centre. Gram +ve rods, responds to penicillin
Bacillus anthracis