Antibiotics. which is which?

I'm now obsessed with infectious disease, currently doing elective rotation for this. Just very basic principle on the choice of a/b. If you suspect bacterial infection, use empirical antibiotics. Do Culture and sensitivity of all available samples.

For empirical guidelines:

1st- know the common microorganisms causing the infection.

2nd- useful to know guidelines in which hospital you works

3rd-offer choice for penicillin allergic patients.

4rd- consider resistance

Basically these are the commonest a/b used. How to remember this?

Streptococci- Benzylpenicillin ( I pronounce it as streB)

Staphylococci-Flucoxicillin ( I pronounce it as staF )

anaerobes-Metronidazole ( anae for azole )

Gram -ve- gentamycin ( gen)

and usually i love to use my lecturer's simplified table

credit to my lecturer :Dr J. Q