You've done everything right—your child is fully vaccinated, including against rotavirus. Yet they still get hit with diarrhoea that leaves you worried and exhausted. If this sounds familiar, you're not alone. New research from Ghana reveals why vaccination alone isn't enough: diarrhoea in young children is actually caused by a sneaky combination of multiple germs working together.
Researchers studied children under five who came to a health clinic with diarrhoea, all of whom had been properly vaccinated against rotavirus. What they discovered was surprising: rotavirus was found in only 2.5% of cases. Instead, the main culprits were three bacteria called EAEC, Shigella, and EIEC, plus a virus called Norovirus. But here's the critical finding—and this is what made the research important—94.7% of children had multiple infections at the same time. When bacteria and viruses infected a child together, the diarrhoea became moderate to severe in 73% of cases.
What This Means for Singapore and Asian Families
Singapore's tropical climate and high population density create perfect conditions for these germs to spread. Our excellent vaccination programmes have successfully reduced rotavirus cases, which is wonderful. However, this research shows us that protection against one pathogen leaves children vulnerable to others. The bacteria and viruses identified in this study circulate widely across Asia, particularly in areas with warm, humid weather. For Singapore parents, this means diarrhoea prevention requires more than just vaccines—it demands consistent attention to hygiene and sanitation throughout your child's early years.
The high rate of co-infections is particularly important for our region to understand. In crowded urban environments and during monsoon seasons when water quality can be compromised, children are exposed to multiple pathogens simultaneously. This is why you might notice that your child's diarrhoea seems worse than expected, or lasts longer than you'd think it should. They may literally be fighting several infections at once.
Asian healthcare systems, including Singapore's, should pay attention to this research's recommendation for regular monitoring of which pathogens are circulating. By tracking these patterns, health authorities can provide better guidance to parents and doctors about what to watch for and how to treat severe cases.
Three Practical Steps for Your Family
- Hygiene goes beyond handwashing. Since multiple germs cause childhood diarrhoea, make thorough handwashing a ritual—not just before eating, but after play, after using the toilet, and before preparing food. In Singapore's heat, germs spread faster on surfaces. Clean toys regularly, especially those your child puts in their mouth. Wash fresh produce thoroughly.
- Watch water quality carefully. While Singapore's tap water is safe, be cautious during travel within Asia and even at home during maintenance work. Use bottled water for young children when travelling, and ensure any childcare facility has proper water handling practices. Contaminated water is a major source of these bacteria.
- Know when diarrhoea needs urgent attention. If your child has diarrhoea with signs of severe dehydration (no wet nappies for 8+ hours, extreme lethargy, sunken eyes), or if it's bloody or lasts more than a few days, seek medical care promptly. Since co-infections make diarrhoea worse, your doctor may need to investigate further rather than assuming it's a simple viral infection.