INFECTIOUS DISEASE Flashcards
Mainly with symptoms of meningitis or meningoencephalitis
common cause of HIV-related meningitis
cryptococcosis
Ix for cryptococcosis
Gold standard = culture CrAg
LP = round encapsulated yeast
management of cryptococcosis
Amphotericin B + flucytosine
Hx of being on farm/ construction site
flu -like symptoms, pneumonia symptoms and also any pulmonary manifestations with arthralgia
histoplasmosis
Ix for histoplasmosis
histology/cytology of lymph node or lung disease
fungal culture
management of histoplasmosis
Amphotericin B and itraconazole
non-productive cough exertional dyspnoea fever tachypnea chest pain
usually opportunistic in HIV
Pneumocystis Jiroveci
Ix for pneumocystis jiroveci
exertional O2 stats = usually drop
induced sputum culture - bronchoalveolar lavage
CXR - typically normal but some cases show bilateral interstitial infiltrates
Management of pneumocystis jiroveci
IV/high dose of co-trimoxazole (Septrin) and steroid
check G6PD status
prodrome = headache, fever and agitation
hydrophobia - water provoking muscle spasms
hypersalivation
negri bodies in infected neurons
rabies
Ix for rabies
usually clinical suspicion
immunofluorescence from saliva/CSF or anti-rabies antibodies
management of rabies
contact PHE
vaccines given
if previously vaccinated - 2 doses given
if no prev vaccines - HRIG with full doses of jabs
benzodiazepines, haloperidol analgesia and anticholinergics for spasms
NOTIFY PHE
manifests as colitis hepatitis encephalitis pneumonitis retinitis
commonly affects immunocompromised people
transmitted through sex/close contact
cytomegalovirus
'blueberry muffin' lesions on skin growth retardation sensorineural deafness seizures hepatosplenomegaly
congenital cytomegalovirus syndrome
Ix of cytomegalovirus
serology IgM/G
‘owls eye’ inclusions on CMV PCR
management of cytomeglovirus
supportive in immunocompetent & antiviral in immunocompromised
cidofovir/foscarnet and ganciclovir
diarrhoea nausea vomiting fever abdo cramps
salmonella
Ix for salmonella
stool MCS
management for salmonella
supportive - hydration
if severe, consider ciprofloxacin or azithromycin
isolate for 48hrs after last vomiting/diarrhoea episode and notify PHE
fever headaches constipation dry cough rash
complications = confusion/delirium, intestinal perforation
Typhoid
salmonella typhi & paratyphi
Investigations of salmonella typhi & paratyphi
blood culture
stool MCS
serology unreliable
management of salmonella typhi and paratyphi
IV ceftriaxone
follow with oral azithromycin
diarrhoea - often bloody
fever
abdo pain
acquired faeco-oral or sexually transmitted
shigella
Ix for shigella
stool MCS
management for shigella
supportive - hydrate
if really unwell = ciprofloxacin/azithromycin
reinforce hand hygiene and notify PHE
prodrome = fever, lethargy., headache
trismus (lockjaw)
spasms (dysphagia)
opisthotonus - arched back/hyperextended neck
tetanus
management of tetanus
usually in ICU setting
- wound debridement
- ceftriaxone and metronidazole
- vaccinate
supportive treatment, muscle relaxants and IM tetanus Ig
diarrhoea = ‘rice-water stool’
abdo pain
vomiting
hypoglycaemia/dehydration
cholera