ID Flashcards
Treatment regime in Isoniazod-resistant TB
2 months of RIPE
Then further 4 months of Rifampicin and Ethambutol (in place of RI)
Features of Strongyloides stercoralis infection (nematode worm)
Diarrhoea + abdo pain + bloating
Linear itchy rash (larva currens)
Pneumonitis if larvae migrate to lungs
Treatment of Strongyloidiasis
Ivermectin/albendazole
Features of Strongyloides Hyperinfection Syndrome (proliferation of larvae in immunosuppression)
Paralytic ileus
Sepsis due to gut bacteria translocation
Pulmonary infitrates
Suspect Lyme disease - erythema migrans is present
Treat: Doxycyline 14 - 21 days
Suspect Lyme disease - no erythema migrans.
ELISA for Borrelia burgdorferi antibodies
Suspect Lyme disease - (no erythema migrans) - Borrelia ELISA serology negative at <4wk since symptom onset
Repeat ELISA in 4-6wk
Suspect Lyme disease - (no erythema migrans) - Borrelia serology negative at >12wk since symptom onset
Immunoblot
Suspect Lyme disease - (no erythema migrans) - Borrelia ELISA positive
Immunoblot test
Suspect Lyme disease - (no erythema migrans) - Borrelia serology equivocal
Immunoblot
Management of early Lyme disease - in pregnancy
Amoxicillin (doxycycline CI in pregnancy)
Management of disseminated Lyme disease - in pregnancy
Ceftriaxone
Monitoring of HIV
Viral load every 6m
CD4 count annually
Clostridium botulinum - bacterial identification
Gram positive anaerobic bacillus
Management of botulism
Botulism antitoxin (if early) Supportive care
Features of leprosy
Hypopigmented patches
Anaesthetic nodules
May be symmetrical or asymmetrical nerve involvement
Alopecia
Diagnosis of leprosy
Skin biopsy
Management of leprosy
Triple therapy:
Rifampicin + dapsone + clofazimine
Features of Mycoplasma pneumonia
Dry cough Prolonged flu-like Erythema multiforme Hyponatraemia Haemolytic anaemia (cold agglutinins)
Treatment of latent TB (asymptomatic TB, positive blood test, no imaging findings)
Dual therapy, either:
3 months of Isoniazid (+Pyridoxine) + Rifampicin
or
6 months of Isoniazid (+Pyridoxine)
Which drugs risk re-activation of TB
TNF inhibitors:
Etanercept
Infliximab
Tests used to diagnose latent TB
Quantiferon (IFN-g release assay)
Mantoux
Features of Dengue fever
Fever Severe bone/muscle aches Retro-orbital headache Maculopapular rash Low WCC, low PLT Haemorrhagic phase
Treatment of Dengue fever
Supportive
Features of Scrub typhus
Fever + muscle pain
Eschar at mite entry site
Features of Typhoid fever
Relative bradycardia
Abdo pain
Rose spots
Reactive athritis
Features of Chikungunya fever
Severe joint pain + swelling
High fevers
Lymphopenia
Thrombocytopenia
Ross River Virus - endemic in
Australia
Chikungunya fever - endemic in
Africa
Asia
Caribbean
Treatment for schistosomiasis
Praziquantel
Treatment for giardiasis
1 week Metronidazole
or
3g Tinidazole stat
Cryptococcus meningitis (fungal) - CSF findings
Raised opening pressure
Lymphocytosis
High protein
Low glucose
Management of Cryptococcus meningitis
Amphotericin B
Treatment for amoebic liver abscess
Metronidazole
Treatment of fungal liver abscesses
Amphotericin B
Treatment for intestinal amoeba (after treated the liver abscess)
Diloxanide furoate
Antibiotic for Legionnaire’s disease
Macrolide (clarithromycin/erythromycin) or quinolone (levofloxacin)
Antibiotic treatment of Listeria meningitis
IV amoxicillin/ampicillin + gentamicin
Antibiotic treatment of tetanus wound (after debridement and tetanus globulin)
Metronidazole IV
1st line management of Brucellosis
Oral doxycycline + rifampicin
Management of Brucellosis with neurological involvement
IV Ceftriaxone + doxycycline + rifampicin
Management of brucellosis with endocarditis
Gentamicin + doxycycline + rifampicin
Presentation of Yersinia enterocolitica
Pseudo-appendicitis
Reactive arthritis
Erythema nodosum
Treatment of Yersinia
Aminoglycoside (gentamicin)
Treatment of salmonella gastroenteritis (non typhoid)
Ciprofloxacin
DIffuse macular/papular/nodular rash with discoloration, after treatment for visceral leishmaniasis
Post-kala-azar dermal leishmaniasis (PKDL)
Visceral leishmaniasis “kala-azar” (spread by sand fly) - endemic in
Mediterannean, Middle East, Asia, Africa, S. America,
Features of Giardiasis
Prolonged diarrhoea >10days
Bloating, abdo pain
Non-bloody
Farmer, with fever, pneumonia, transaminitis, think…
Q fever (Coxiella burnetii)
Treatment of Q fever (Coxiella)
Doxycycline
Management of mild PCP
Co-trimoxazole
Management of moderate/severe PCP
(eg diffuse shadowing on CXR/ low sats/ breathless at rest),
Co-trimoxazole + corticosteroids
What does a positive IGRA (interferon-gamma release assay) indicate?
Active or latent TB
What might positive Mantoux test (induration 6-15mm) indicate?
Latent TB Miliary TB Sarcoidosis HIV Lymphoma
Antibiotic used for Shigella (if needed)
CIprofloxacin
Antibiotic used for Campylobacter (if needed)
Ciprofloxacin
Antibiotic used for Cholera (if needed)
A tetracycline
Features of Brucellosis
Fever, malaise
Sacroiliitis
Contact with sheep/goats
or animal products in Med/Middle East
Features of malaria
Fever, myalgia
Jaundice
Hepatosplenomegaly
Features of viral haemorrhagic fevers (Yellow fever, Dengue, Ebola, Lassa)
Prodrome
Anaemia, thrombocytopenia
Renal failure
DIC
Treatment of uncomplicated Falciparum malaria
“ACT” Artemisinin-based combination therapy (eg artesunate plus mefloquine)
Treatment of severe/complicated Falciparum malaria
IV artesunate
Exchange transfusion if parasite count >10%
Who needs to be treated for non-typhoidal salmonella gastroenteritis?
> 50 years old and:
Immunocompromised
Valve disease
Endovascular abnormality
Features of Yellow fever
Fever + malaise
Jaundice
Conjunctival injection
Relative bradycardia
Councilman bodies in hepatocytes - seen in which disease
Yellow fever
Antibiotics used to treat carbapenemase producing enterobacteriaceae (CPE)
Gentamicin (macrolide)
Tigecycline
Fosfomycin
Colistin
Treatment of typhoid fever
Cefotaxime/ceftriaxone
Features of Visceral Leishmaniasis (kala-azar)
Fevers
Hepatosplenomegaly
Pancytopenia
Grey skin
Gold standard test for visceral leishmaniasis
Bone marrow or splenic aspirate (amastigote parasites)
Confusion in returned traveller from Asia, think
Japanese encephalitis
HIV positive with headache and neurological symptoms, think…
CNS cryptococcus
Test for Cryptococcus
India ink
Treatment of CNS cryptococcal infection
IV amphotericin B + flucytosine
Treatment of staph aureus bactaraemia
At least 2 weeks of IV Flucloxacillin
Features of acute schistosomiasis infection
Cough
Bloody diarrhoea
Eosinophilia
Splenomegaly
Diagnosis of intestinal Cryptosporidium parvum (protozoan)
Cysts seen on acid-fast stain of stool culture
Indication for varicella-zoster immunoglobulin (VZIG)
Should be given within 7 days of exposure to:
Immunosuppressed
Neonates
Pregnant without varicella antibodies
Management of chickenpox in immunocompromised individuals (once developed chickenpox)
IV aciclovir
Fever on alternate days - suggestive of
P. vivax or P. ovale malaria
Treatment of plasmodium vivax malaria
Chloroquine + primaquine (for hyponozoites)
Gold standard diagnostic test for strongyloidiasis
Stool microscopy
Best test for strongyloidiasis eradication
Serological testing
Management of low-severity community acquired pneumonia
Amoxicillin 5 days
Management of low-severity community acquired pneumonia (pen-allergic)
Macrolide (clarithromycin) or tetracycline 5 days
Management of moderate severity community acquired pneumonia
Amoxicillin + macrolide 7-10 days
Management of high severity community acquired pneumonia
Co-amoxiclav (or ceftriaxone/tazocin) + macrolide
CURB-65 score - 1 point for C if
AMTS <= 8/10
CURB-65 score - 1 point for U if
Urea > 7
CURB-65 score - 1 point for R if
RR >= 30
CURB-65 score - 1 point for B if
Systolic <= 90 or diastolic <= 60
Management of CURB-65 score 2+
Consider hospital admission
Management of CURB-65 score 3+
Consider ITU
Which HIV patients should receive PCP (pneumocystis carinii) prophylaxis
All those with CD4 count <200/mm
Which non-HIV patients should receive PCP prophylaxis
Transplant recipients (solid organ or stem cell)
Taking steroids + another immunosuppressant for >1m
AI condition with lung involvement + high dose steroid >1m
Diagnosis of PCP
Broncho-alveolar lavage - shows cysts with silver staining
Initial empirical treatment for meningitis if <3 months old
IV cefotaxime + amoxillin/ampicillin)
Initial empirical treatment for meningitis if 3 months - 50 years old
IV cefotaxime/ceftriaxone
Initial empirical treatment for meningitis if >50 years old
IV cefotaxime/ceftriaxone + amoxicillin/ampicillin
Treatment of meningococcal meningitis
IV benzylpenicillin
or
IV cefotaxime/ceftriaxone
Treatment of pneumococcal meningitis
IV cefotaxime/ceftriaxone
Treatment of meningitis caused by Haemophilus influenzae
IV cefotaxime/ceftriaxone
Treatment of meningococcal meningitis (pen-allergic)
Chloramphenicol
Treatment of meningitis caused by Haemophilus influenzae (pen-allergic)
Chloramphenicol
Haemophilus influenzae appearance under microscope
Gram-negative coccobacilli
Chlamydia trachomatis gram-stain
Gram-negative coccobacilli
Management of close contacts of meningococcal meningitis (close contact within the 7 days before onset)
PO ciprofloxacin STAT
or PO Rifampicin BD 2 days
or IM ceftriaxone
Meningococcal vaccination when serotype availabe