A sore throat is one of the most common reasons people book a GP appointment in Auckland. Most sore throats come from viral illness and settle on their own, but two conditions stand out because they look similar yet behave differently: tonsillitis and strep throat. Knowing the difference helps you decide whether to rest at home, book a GP visit, or seek urgent care.
What is tonsillitis?
Tonsillitis is inflammation of the tonsils, the two lymph tissue pads at the back of the throat. The tonsils help trap germs that enter through the mouth or nose, so they are often the first part of the throat to swell when an infection takes hold.
Tonsillitis can be:
- Acute: a short illness lasting a few days to around two weeks.
- Recurrent: several episodes each year.
- Chronic: ongoing inflammation without full recovery between episodes.
About 70 to 85 percent of tonsillitis cases are caused by viruses such as rhinovirus, adenovirus, influenza, or glandular fever (Epstein-Barr virus). The remainder are bacterial, most often group A streptococcus, which is the same bacterium responsible for strep throat.
What is strep throat?
Strep throat specifically refers to a throat infection caused by the group A streptococcus bacteria. It can involve the tonsils (streptococcal tonsillitis) or the surrounding throat tissue. In New Zealand, strep throat is taken seriously because untreated group A strep infections can, in some cases, lead to rheumatic fever and rheumatic heart disease. Maori and Pacific children and young people aged 4 to 19 are at higher risk, and the Ministry of Health recommends that sore throats in these groups are always checked.
How tonsillitis and strep throat differ
| Feature |
Viral tonsillitis |
Strep throat (bacterial) |
| Main cause |
Cold and flu viruses, Epstein-Barr virus |
Group A Streptococcus bacteria |
| Onset |
Often gradual with cold symptoms |
Often sudden |
| Cough and runny nose |
Common |
Less common |
| Fever |
Mild to moderate |
Moderate to high |
| Throat appearance |
Red, sometimes swollen tonsils |
Very red tonsils, often with white or yellow patches |
| Neck glands |
Sometimes tender |
Usually tender and swollen |
| Typical age |
Any age |
More common in children aged 5 to 15 |
| Treatment |
Rest, fluids, symptom relief |
Antibiotics, usually penicillin |
Common symptoms
Both conditions share many symptoms. You may notice:
- Painful or scratchy throat, especially on swallowing
- Red, swollen tonsils, sometimes with white patches or pus
- Tender or swollen lymph glands in the neck
- Fever, headache, and tiredness
- Bad breath and a muffled or hoarse voice
- Earache on swallowing (pain referred from the throat)
- In children: tummy pain, nausea, and refusing food or drink
Viral illness tends to come with cough, runny nose, hoarseness, and watery eyes. Strep throat is more likely to hit quickly with fever, very sore tonsils, and no cough.
When to see a GP
Most sore throats settle within a week with rest and fluids. Book a GP appointment if:
- The sore throat lasts more than 48 hours with fever
- You see white patches or pus on the tonsils
- Swallowing is very painful or you are drinking much less than usual
- Neck glands are very tender or swollen
- You or your child are Maori or Pacific, aged 4 to 19, and have a sore throat
- You have a history of rheumatic fever or rheumatic heart disease
- Symptoms return within a few weeks of finishing a previous course of antibiotics
Seek urgent care at the emergency department or call 111 if there is:
- Difficulty breathing, drooling, or trouble opening the mouth
- A muffled voice with one-sided throat swelling (possible quinsy or peritonsillar abscess)
- A widespread red rash, high fever, and a very unwell appearance
How a GP diagnoses tonsillitis or strep throat
At CityMed and most Auckland GP clinics, the consultation typically includes:
- A full history: when symptoms started, pain severity, fever pattern, exposure to others with sore throat, and any underlying risk factors
- An examination of the throat, ears, neck glands, and chest
- A throat swab to test for group A streptococcus where clinically indicated. This is the gold standard test in Aotearoa and is free for most children and young people in higher risk groups
- A rapid antigen or PCR test in some clinic settings, although throat culture remains the most widely used confirmation
If the swab is positive for group A strep, a course of antibiotics is started and the full 10 day course must be completed to reduce the risk of rheumatic fever.
Treatment
Home care for viral tonsillitis
- Rest and drink plenty of fluids, especially water, warm drinks, or ice blocks
- Paracetamol or ibuprofen at the recommended dose for pain and fever. Ibuprofen should be taken with food and avoided if you have stomach ulcer disease, kidney problems, or pregnancy concerns without GP advice
- Salt water gargles may ease throat discomfort in adults and older children
- Throat lozenges for adults and older children
- A cool mist humidifier or a steamy bathroom can ease irritation
- Soft cool foods such as yoghurt, jelly, or smoothies if swallowing is painful
Antibiotic treatment for strep throat
- Penicillin V (phenoxymethylpenicillin) taken orally for 10 days is the standard first-line treatment in New Zealand
- Amoxicillin is an alternative, sometimes preferred for children
- If you are allergic to penicillin, your GP will prescribe an alternative such as erythromycin
- You or your child should start to feel better within 24 to 48 hours, but it is important to finish the full course even when symptoms improve
Tonsillectomy (surgical removal of tonsils)
A GP may consider referral for tonsillectomy when there are frequent recurrent infections (for example, seven or more documented episodes in one year, five per year over two years, or three per year over three years) or when large tonsils are causing sleep-disordered breathing. Most people do not need surgery.
Complications to watch for
Most sore throats recover without problems. Occasionally, bacterial throat infections can lead to:
- Peritonsillar abscess (quinsy): a pus collection beside the tonsil causing severe one-sided throat pain, muffled voice, and difficulty opening the mouth. Needs urgent assessment.
- Rheumatic fever and rheumatic heart disease: a delayed immune reaction that can damage heart valves. Completing antibiotics as prescribed is the main prevention.
- Post-streptococcal glomerulonephritis: a rare kidney inflammation seen after strep infection.
- Scarlet fever: a pink sandpaper-textured rash with fever and strawberry tongue, still responsive to standard antibiotics.
Prevention
- Wash hands regularly with soap and water, especially after coughing or sneezing
- Cover coughs and sneezes with a tissue or your elbow
- Do not share drink bottles, cups, cutlery, or toothbrushes
- Keep children home from school or early childhood care until they have been fever-free for 24 hours and have been on antibiotics for strep throat for at least 24 hours
- Stay up to date with seasonal influenza vaccination, which reduces one viral cause of sore throats
Frequently asked questions
Can I get strep throat from viral tonsillitis?
No. Viral tonsillitis is caused by viruses and strep throat is caused by bacteria. However, a viral throat infection can sometimes weaken local defences and make bacterial infection more likely in the same illness window, which is why worsening symptoms after a few days deserves a GP check.
How long is strep throat contagious?
Group A strep is typically contagious until 24 hours after the first dose of appropriate antibiotics and the fever has resolved. Without antibiotics, a person can remain infectious for two to three weeks.
Do I always need antibiotics for a sore throat?
No. Most sore throats are viral and recover with rest and fluids. Antibiotics only work against bacteria. Your GP will decide based on your symptoms, risk factors, and where appropriate a throat swab.
What if symptoms come back after finishing antibiotics?
Return to your GP. You may need a second swab, a different antibiotic, or review for complications. Do not restart antibiotics without medical advice.
Need to see a GP in Auckland?
CityMed Medical Centre offers GP appointments in Auckland CBD for sore throats, tonsillitis, and strep throat assessment, including throat swabs and prescriptions where required. Book online at citymed.co.nz or call our reception.