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Phase 2a > Microbiology > Flashcards

Flashcards in Microbiology Deck (260)
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151

What samples can be used for diagnosis?

green viral swab, black charcoal swab, CSF, stool

152

What tests count WCC quickly?

CSF

153

What blood tests can be done?

FBC, blood film and yellow top for EBV serology

154

How long does it take for blood results to be available?

film - hours
pcr - next day
acute EBV serology - 1-2 days

155

Management of glandular fever?

supportive therapy, avoid contact sport for 6 weeks to avoid splenic rupture

156

What 3 markers can HIV tests detect in the blood?

antibody, antigen p24, HIV RNA

157

What happens if HIV test is negative?

may not be in window period, so screen again after window period

158

What happens in HIV test is positive?

confirm test inn the lab with a different assay

159

Treatment of CMV?

IV gangciclovir

160

Causes of UTI?

sexual intercourse, catheterisation, enlarged prostate, renal tract tumours, renal stones

161

What investigations are need in UTI?

mid stream urine, direct microscopy for pyuria, culture (which can show significant bacteriuria, doubtful significance or a contaminant), sensitivity testing (to find appropriate antibiotics)

162

What is a skin organisms that can colonise the perineium and seen in UTI?

staphylococcus saprophyticus (gram positive cocci)

163

What do leucocytes and nitrates in urine sample suggest?

UTI

164

How can gram negative bacilli appear on a CLED agar?

yellow (lactose fermenting)
white (non lactose fermenting)

165

What antibitoics is E.coli pyelonephritis resistant and sensitive to?

r = amoxicillin
s = co amoxiclav

166

Why can't catheter bag urine be used for urinalysis results?

because all catheters have bacteria and white cells in, even without an infection

167

Benefits of CLED agar?

promotes UTI pathogens
distinguished lactose and non lactose fermenting
prevents proteus swarming

168

When should you treat asymptomatic bactriuria?

in pregnant women

169

What is erysipela?

intradermal skin infection

170

What causes erysipela?

group A beta haemolytic streptococcus and staphylococcus aureus

171

What is cellulitis?

a subcutaneous skin infection

172

What causes cellulitis?

group A beta haemolytic streptococcus (occasionally B, C, G) and staphylococcus aureus

173

In who are atypical organisms causing skin infections common?

IV drug users and immunocompromised

174

What organisms commonly cause skin soft tissue abscess?

staphylococcus aureus

175

What organisms commonly causes lung abscesses?

staphylococcus aureus, kelbiella pneumoniae, anaerobic organisms, mycobacterium tuberculosis

176

What organisms commonly cause liver abscesses?

gram negative, strep.milleri, anaerobes, entamoeba histolytica in tropic

177

What organisms commonly cause kidney abscesses?

e.coli and klebsiella

178

What organisms commonly cause bowel abscesses?

gram negative, anaerobes, strep.milleri

179

How does impetigo present?

itchy, growing in size spot on the face, it weeps and crusts

180

Treatment of impetigo?

flucloxacillin