Why Your Doctor Sometimes Says No to Antibiotics: Protecting Children from Superbugs
Quick answer
Antibiotics save lives when they're used for the right infections, but they don't touch viruses. Most colds, chest coughs, and sore throats in South African children are viral, and antibiotics won't make recovery faster. When your doctor says no to antibiotics, that's not being dismissive, it's evidence-based medicine protecting your child from side effects and protecting the community from superbugs. Antimicrobial resistance is growing fast in South Africa, and every unnecessary prescription makes the problem worse. This article explains when antibiotics are needed, when they aren't, and the red flags that always warrant urgent care.
Key points
- Most childhood respiratory infections are caused by viruses and do not respond to antibiotics
- Sub-Saharan Africa has the highest antimicrobial resistance mortality rate globally, and South African neonatal units are seeing rising carbapenem resistance
- Sore throat is the one situation where SA parents should be alert, given our high rheumatic heart disease burden: if strep is confirmed, the full 10-day antibiotic course matters
- Antibiotics in the first weeks of life disrupt the infant gut microbiome for up to 12 months, with long-term links to asthma and allergies
- Red flags in SA children include age under 3 months with fever, breathing difficulty, HIV exposure, TB contact, and severe malnutrition
- Parents can help by trusting watchful waiting, completing any prescribed course fully, and keeping childhood vaccines up to date
The superbug problem in South Africa
Antimicrobial resistance (AMR) means bacteria that used to be killed by antibiotics are no longer responding, leaving infections harder to treat. The scale of the problem in Africa is striking.
Sub-Saharan Africa has the highest AMR mortality rate globally. The WHO African region saw approximately 250,000 deaths directly caused by bacterial AMR in 2019, with over one million deaths associated with AMR. In sub-Saharan African children with bloodstream infections, 40.6% of E. coli and 84.9% of Klebsiella are resistant to third-generation cephalosporins, antibiotics we rely on when first-line treatment fails.
South African data is particularly concerning. A 10-year review of a Gauteng tertiary neonatal unit found that 31% of all Gram-negative bacteria are now resistant to carbapenems, our last-resort antibiotics, with the number climbing each year. For E. coli causing infections in SA babies, around 89% are resistant to ampicillin and 47% to gentamicin, two drugs still commonly prescribed. For Klebsiella, 66% are resistant to gentamicin and 78% to cefotaxime.
Every unnecessary antibiotic prescription speeds this process up. Bacteria that survive exposure pass their resistance to other bacteria, and the next time someone genuinely needs the antibiotic, it may not work.
When antibiotics don't help
The single most important fact about respiratory illness in children: most of what looks like an infection is viral. Antibiotics only kill bacteria. They do nothing to viruses. Giving them for a viral illness doesn't shorten the illness, doesn't reduce fever faster, and doesn't prevent complications. What it does is expose your child to side effects (diarrhoea, nappy rash, thrush, allergic reactions) and contribute to resistance.
Colds and runny noses
The common cold is always viral. Cloudy or green mucus does not mean a bacterial infection, contrary to what many of us were told growing up. Green mucus is white blood cells doing their job, and colour changes are normal throughout any viral illness. Treatment is comfort measures: fluids, rest, saline spray for blocked noses, and paracetamol for fever or pain.
Chest coughs and bronchitis
Acute bronchitis in children is almost always viral. Even when the cough sounds impressive, antibiotics don't help. A cough after a cold can linger for up to three weeks on average, and persistence alone doesn't mean the illness has turned bacterial.
Most sore throats
Most sore throats in children are viral. Symptoms and clinical examination alone cannot reliably tell strep throat apart from viral pharyngitis, which is why testing matters (more on this below).
Ear infections
Ear infections (acute otitis media) are a partial exception. In children over six months with mild to moderate symptoms, watchful waiting for 48 to 72 hours is safe and avoids antibiotics in most cases, because most ear infections resolve on their own. Antibiotics are indicated for children under six months, severe symptoms, or failure to improve after the waiting period. When prescribed, high-dose amoxicillin is first-line in SA practice.
The sore throat exception: rheumatic heart disease in South Africa
Sore throat deserves its own section in the SA context. Rheumatic heart disease (RHD) is a serious, preventable complication of untreated group A streptococcal throat infection. The strep bacteria trigger an abnormal immune response that damages the heart valves, sometimes permanently.
South Africa has one of the highest RHD burdens in the world. A Cape Town screening study found asymptomatic RHD in 20.2 per 1,000 schoolchildren, among the highest rates globally. Sub-Saharan Africa carries 23% of the global RHD caseload with only 17% of the world's population.
What this means in practice:
If strep throat is confirmed by a rapid test or throat culture, antibiotic treatment is not optional. Treatment reduces the risk of acute rheumatic fever by around 80%. First-line treatment is penicillin or amoxicillin for a full 10 days. Stopping early because the child feels better defeats the purpose, and in SA the downstream risk is too serious to shortcut.
Clinical signs alone are not reliable for diagnosing strep, even using scoring systems like Centor or McIsaac. Testing is ideal where available. The challenge in many SA primary care settings is access to rapid testing, which can lead to both overtreatment of viral sore throats and undertreatment of real strep. At NeoHealth we use throat swab testing when strep is clinically plausible, especially in children aged 3 to 15 years where the pre-test probability is highest.
What antibiotics do to the infant gut
A developing baby's gut bacteria, collectively called the microbiome, influence immune development, digestion, growth, and long-term health. Antibiotics in the first weeks and months of life disrupt this process more than we used to appreciate.
Research shows that antibiotics given in the first week of life cause major shifts in gut bacterial composition: beneficial Bifidobacterium drops, and potentially harmful Klebsiella and Enterococcus increase. These changes can persist for up to 12 months after treatment. Not all antibiotic combinations are equal: amoxicillin plus cefotaxime causes the most disruption, while penicillin plus gentamicin is relatively gentler.
The longer-term associations (not proof of causation, but consistent across large studies):
Children exposed to antibiotics before age 2 have a 24% increased risk of asthma and a 33% increased risk of food allergies. Neonatal antibiotic exposure is linked to impaired weight and height gain in the first six years, particularly in boys, and this is thought to be mediated by reduced Bifidobacterium diversity. Some studies also link early exposure to cognitive and behavioural differences later in childhood.
The Drakenstein Child Health Study, a major SA birth cohort following 1,000 mother-child pairs in a peri-urban community near Cape Town, is investigating these exposures in an African context where infectious disease burden is high. Findings continue to emerge and will increasingly inform local practice.
This is not an argument against antibiotics when they're needed. It is an argument for using them only when they're needed.
In this guide
Red flags that change the calculus
Watchful waiting is for well-appearing children with symptoms that fit a viral pattern. Certain situations in the SA context shift the balance and should prompt urgent medical review rather than a wait-and-see approach.
Age matters
Any baby under three months with a fever of 38°C or higher needs urgent assessment. At this age, serious bacterial infection is harder to detect clinically and the stakes are high. Infants under one year have a 42% treatment failure rate for severe pneumonia, compared to 17% in older children.
Breathing trouble
Fast breathing, chest indrawing (the skin pulling in between the ribs with each breath), grunting, or a child struggling to feed because they can't catch breath, are all signs of serious respiratory illness. These warrant urgent assessment regardless of fever.
HIV exposure or HIV infection
HIV-exposed and HIV-infected children have 5 to 6 times higher treatment failure rates for pneumonia and higher overall mortality. The threshold for antibiotics and for hospitalisation is lower. TB should be actively considered in any HIV-infected child with persistent cough, fever, or poor weight gain.
TB contact
In SA, a child with known TB contact plus cough, fever, or poor weight gain has around 89% sensitivity for active TB using standard screening criteria. This is not a situation for watchful waiting, and antibiotics for presumed bacterial pneumonia should never delay TB assessment.
Severe malnutrition
Severely malnourished children have blunted immune responses and can have serious bacterial infections without the usual outward signs. Pneumonia in severely malnourished children has a 21% TB co-infection rate in some studies. The threshold for antibiotics, hospital admission, and TB workup is lower.
General danger signs
Call a doctor urgently or go to a casualty unit for any of the following:
- Lethargy, floppy baby, or difficulty rousing
- Convulsions
- Persistent high fever over 39°C for more than three days
- Refusal to drink or breastfeed
- Persistent vomiting
- A rash that doesn't fade when pressed with a clear glass
- Worsening after initial improvement
How parents can help fight superbugs
This isn't abstract public health. Your choices in the next common cold, sore throat, or ear infection contribute to whether antibiotics will still work for your child, or your neighbour's child, in ten years.
Trust watchful waiting
When your doctor recommends 48 hours of symptom management rather than an immediate antibiotic, this is evidence-based, not lazy medicine. Multiple high-quality studies show that watchful waiting for appropriate conditions does not lead to worse outcomes, longer illness, or more complications.
Ask the right questions
Instead of asking for an antibiotic, useful questions are: Is this infection likely viral or bacterial? What are the warning signs that would change things? How long should symptoms last before I'm concerned? If it's viral, what is the best way to help my child feel better?
Follow safety-netting advice
A good consultation for a viral illness should end with clear instructions: here's what to expect, here's what to watch for, here's when to come back. If those instructions aren't clear, ask for them before you leave the room.
When antibiotics are prescribed, complete the course
Finish the full course even if your child feels better after two days. Stopping early is one of the ways resistance develops, particularly for strep throat. Do not save leftover antibiotics for the next illness. Do not share antibiotics. Do not use antibiotics prescribed for someone else or for a previous illness.
Prevention is the best stewardship
Every infection prevented is an antibiotic avoided. Keep childhood vaccines up to date, particularly the hexavalent, pneumococcal, and measles-rubella schedules, which prevent infections that would otherwise often require antibiotics. Good hand hygiene, adequate nutrition, and breastfeeding where possible all reduce infection burden.
Bring the Road to Health Booklet (RtHB) to every GP visit. The RtHB is the patient-held record of your child's immunisations across public and private sectors. It lets clinicians confirm which vaccines your child has already received, which prevents unnecessary re-prescriptions and keeps the full childhood immunisation record in one place.
Important: This article provides general medical information and is not a substitute for personalised medical advice. If you have specific concerns about your child's symptoms or treatment, please book a consultation with your GP. In medical emergencies, call 10177 or visit your nearest emergency facility.
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Frequently Asked Questions
How do I know if my child's illness is viral or bacterial?
Your doctor uses a combination of history, examination, and sometimes tests (throat swab, urine dipstick, rarely blood tests) to decide. In general, illnesses that start with a runny nose and progress gradually tend to be viral. Sudden high fever with focal signs like ear pain, painful swollen tonsils, or difficulty breathing may be bacterial. The assessment is more nuanced than a simple checklist, which is why we examine rather than guess.
Doesn't green mucus mean bacterial infection?
No. Green or yellow mucus is normal at various points in a viral illness. The colour tells you about your immune system's activity, not about which microbe is involved. Colour alone is not a reason to prescribe antibiotics.
My child had antibiotics for an ear infection last time and got better quickly. Why wait now?
Most ear infections resolve within 48 to 72 hours with or without antibiotics. If your child took antibiotics last time and improved, the timing doesn't prove the antibiotic did the work, the infection was likely resolving on its own. Watchful waiting is evidence-based and safe for most children over six months.
What if my child gets worse on watchful waiting?
This is exactly what safety-netting advice is for. If symptoms worsen, new symptoms develop, or your instinct tells you something is wrong, come back. We'd far rather see your child an extra time than prescribe antibiotics unnecessarily just in case.
Why does my doctor test for strep throat but not for other sore throats?
Testing for group A strep matters specifically because untreated strep can cause rheumatic heart disease, which remains a major problem in South Africa. Other causes of sore throat, even when bacterial, don't carry the same long-term risk. So we test when strep is clinically plausible and treat based on the result, not a guess.
If I give my child probiotics, will that protect the gut microbiome from antibiotic damage?
Evidence is mixed. Probiotics during and after antibiotic courses can reduce antibiotic-associated diarrhoea and may help restore normal bacteria faster, but the long-term microbiome effects of early antibiotics are not fully reversed by probiotics. The best protection is avoiding unnecessary antibiotics in the first place.
Can I keep a stash of antibiotics at home for emergencies?
Please don't. Unsupervised antibiotic use selects for resistance, means your child may get the wrong drug or wrong dose, and delays proper assessment of what's actually wrong. If you're worried enough to reach for antibiotics, you're worried enough to see a doctor.
My doctor prescribed antibiotics but my child seems better after two days. Can I stop early?
For most infections, no. Stopping early risks the bacteria not being fully cleared and increases the chance of resistance developing in the surviving bacteria. This is particularly important for strep throat (full 10 days) and urinary tract infections. If you have concerns about side effects, call your doctor rather than stopping on your own.