Flashcards in Microbiology Deck (260)
What swab is most appropriate for impetigo?
black charcoal swab
What is impetigo commonly caused by?
How does celluilitis present?
erythematous, hot and tender skin, commonly of leg, fever, painful
What investigations should be done for cellulitis?
take blood from more than one sire on more than one occasion
Treatment of s.pyogenes?
What organism commonly causes cellulitis?
What does MRSA stand for?
methicillin resistant staphylococcus aureus
How is MRSA carriage identified?
chromogenic MRSA plate on swabs from the axillae and groin
What kind of antibiotic is vancomycin?
Treatment of community acquired pneumonia?
What pathogens atypically cause community acquired pneumonia?
How does pneumonia present?
increased HR and RR but low BP, cough, confusion
Treatment of legionella pneumophilia and why?
clarithrimycin or ciprofloxacin as atypical pathogens that cause pneumonia are not sensitive to amoxicillin
What investigation in done in chronic bronchitis?
What does gram negative with white colonies of chocolate agar suggest?
What is the treatment of H.influenzae
amoxicillin and doxycycline
What agars is H.influenzae testing on?
blood agar and chocolate agar
Why is chocolate agar needed for H.influenzae?
the heating of the agar causes release of nutrients that H.influenzae needs for its fastiduous growth, X and V plates have been added too and it only colonies around the XV disc as both are needed, confirming H.influenzae
What 2 stains are used to detect mycobacteria?
ziehl neelsen stain and auramine phenol flourescent stains
Why does TB not show anything on gram stain?
has a different cell wall from other bacteria
What culture medium is used in TB and why?
Lowenstein Jensen Slope - as MTB divides very slow and may take up to 6 weeks to grow
What is seen on TB biopsy?
How can sputum be obtained?
induced or bronchoalveolar lavage
What will sputum show in HIV?
cysts of P.jiroveci
Treatment of P.jireoveci?
prednisolone if significant type 1 resp failure
CD4 count in HIV?
Treatment of pseudomonas in bronchietasis exacerbatio?
antipseudomonal beta lactam or fluroquinolone
What medium are fungus grown on?
Examples of fungus infections?
aspergillus fumigatus and candida albicans