I'm back with the answer..Hehe Thank you to brilliant responders~awie, po'bear and ainul coz the combination of your answers make it juz perfect.

Here is the answer...(adapted from CPG Management of Sore Throat, acadmed.org.my)

1) For paeds age group:

Oral : Penicillin V 250mg bd or tds for 10 days course
Intramuscular : Benzylpenicillin :- <27kg>
>27kg : 1,200,000 unit X 1 dose

If allergic to Penicillin give Erythromycin ethylsuccinate 40mg/kg/day bd-qid (max 1g/day) for 10 days

If allergic to both give Clindamycin 20-30mg/kg/day tds for 10 days.


2) For adult

Same drug of choice except that the dosage is a bit different

Oral Penicillin V 250mg tds/qid or 500mg bd for 10 days

If allergic change to Oral Erythromycin 250mg-500mg qid for 10 days

If allergic to both Use Oral Clindamycin 150mg-300mg qid for 10 days

As awie had stated, the most common bacterial cause is Group A strep followed by Group C strep.

While the commonest viral cause is Rhinovirus followed by Coronavirus and Adenovirus.

As po'bear said and what ainul had experienced, the complications can be divided into suppurative and non suppurative.

Suppurative :
1)peritonsillar abscess or quinsy --> an indication for surgery (ainul did already)
2)retropharyngeal abscess

Non-suppurative:
1)acute rheumatic fever
2) acute post strep glomerulonephritis
3) reactive arthritis

Another indication for surgery is recurrent tonsilitis but it has a few criteria to be fullfilled before deciding.

For further reading, please direct your link to http://acadmed.org.my/cpg/CPG-Management%20of%20Sore%20Throat.pdf