Rotavirus

Rotavirus is one of the most common causes of severe diarrhoeal illness in infants and young children worldwide. Despite the availability of vaccines, it continues to be a major public health challenge, especially in low-income countries. The infection leads to inflammation of the stomach and intestines, resulting in gastroenteritis. While many cases are mild, rotavirus can lead to dehydration and hospitalisation if not treated promptly. Understanding rotavirus is crucial for early detection, effective treatment, and robust prevention strategies.

Rotavirus is a double-stranded RNA virus belonging to the Reoviridae family. It primarily affects infants and young children but can infect people of all ages. The virus spreads through the faecal-oral route, meaning it is passed through contaminated hands, food, water, or surfaces. Once ingested, it targets the small intestine, leading to inflammation, impaired absorption of nutrients, and watery diarrhoea.

The infection is characterised by sudden onset of vomiting, fever, and diarrhoea. Although most children recover with supportive care, severe cases may result in dehydration and require hospitalisation. Vaccination remains the most effective way to prevent rotavirus infections.

India

According to the Indian Council of Medical Research (ICMR), rotavirus is responsible for about 40% of hospitalisations due to diarrhoea in children under five. Despite improved sanitation and awareness, the disease remains endemic in many parts of India. The National Rotavirus Surveillance Network monitors the burden of rotavirus in hospitals, with higher cases noted in states with dense populations and inadequate sanitation.

Worldwide

Globally, rotavirus is estimated to cause over 125 million cases of gastroenteritis and around 200,000 deaths annually among children under five. Most fatalities occur in low- and middle-income countries due to limited access to healthcare and clean water. Universal immunisation programmes have significantly reduced the global disease burden, though disparities still exist.

Rotavirus has several serogroups, but only Group A, B, and C infect humans:

• Group A: Most common and causes the majority of infections in children.
• Group B: Primarily affects adults in China and other parts of Asia.
• Group C: Less common, but can still cause outbreaks.

Vaccines mainly target Group A, which is responsible for the most severe cases in young children.

Rotavirus is caused by direct infection from the rotavirus particle. The main causes include:

• Ingestion of food or water contaminated with faeces
• Touching contaminated surfaces and putting hands in the mouth
• Close contact with an infected person
• Lack of hand hygiene

Children in daycare, hospitals, or crowded living conditions are particularly at risk. Additionally, improper sewage disposal and poor food handling practices can accelerate community transmission.

Symptoms typically appear within two days of exposure and can range from mild to severe:

• Severe watery diarrhoea (lasting 3–8 days)
• Vomiting
• Fever
• Abdominal pain or cramps
• Dehydration symptoms such as dry mouth, sunken eyes, and reduced urination
• Loss of appetite

Infants and toddlers are at greater risk of complications due to rapid fluid loss. In severe cases, the child may show signs of lethargy, extreme irritability, or even shock, indicating immediate medical attention is needed.

Rotavirus is diagnosed through a combination of clinical symptoms and laboratory tests:

• Stool test: Detects rotavirus antigens using enzyme immunoassay (EIA).
• Rapid diagnostic tests: Available in healthcare settings for quick results.
• Polymerase chain reaction (PCR): Confirms virus genotype for epidemiological studies.

Routine testing may not be necessary for mild cases but is important in hospitalised or outbreak scenarios. Diagnosis also helps rule out bacterial or parasitic infections that may present similarly.

There is no specific antiviral treatment for rotavirus. Management focuses on preventing and treating dehydration:

1. Oral Rehydration Therapy (ORT): First-line treatment for mild to moderate dehydration. (ORS Orange Powder)
2. Intravenous Fluids: Required for severe dehydration.
3. Zinc Supplements: Help reduce the duration and severity of diarrhoea. (Zincovit Tablet)
4. Probiotics: May support gut recovery.
5. Nutritional Support: Continued feeding and breastfeeding are crucial.

Antibiotics are not effective against viral infections and should be avoided unless there is a secondary bacterial infection. Antiemetic medications may be prescribed to control severe vomiting and enable rehydration.

Although conventional care is most effective, some alternative therapies may support recovery:

• Home remedies: Such as rice water, coconut water, or banana puree for nutrition and hydration.
• Ayurvedic preparations: Like bael fruit and pomegranate, known for anti-diarrhoeal properties (use with medical advice).
• Acupuncture and reflexology: May help manage nausea and abdominal discomfort in older patients.

These should always complement—not replace—medical treatment. Parents should consult paediatricians before initiating any non-conventional therapies.

Several factors increase the risk of contracting rotavirus:

• Age under five, especially 6 months to 2 years
• Attending daycare or nursery
• Poor sanitation and hygiene
• Lack of rotavirus vaccination
• Malnutrition
• Immunocompromised status (e.g., HIV, cancer therapy)

Premature infants and those not breastfed may also be at higher risk due to a weaker immune system.

Without prompt treatment, rotavirus can lead to serious complications:

• Severe dehydration
• Electrolyte imbalance
• Hospitalisation
• Secondary infections
• Death (in extreme untreated cases)

Dehydration is the leading cause of rotavirus-related mortality in children. Long-term complications are rare but may include prolonged diarrhoea or lactose intolerance post-infection.

For children currently recovering from rotavirus:

• Encourage frequent sips of fluids or ORS
• Continue feeding; breast milk is highly recommended
• Isolate the infected child to prevent spread
• Disinfect surfaces, toys, and linens
• Monitor signs of dehydration and seek help if they worsen

Parents should remain calm and attentive to recovery signs. Most children recover fully within a week. Avoid giving anti-diarrhoeal medications unless prescribed, as they may prolong the infection.

• "Rotavirus is just a common cold of the stomach." – It can lead to hospitalisation and death if untreated.
• "Once infected, a child won't get it again." – Reinfections are possible; vaccines reduce severity, not always complete prevention.
• "Breastfeeding prevents all rotavirus infections." – It helps but doesn’t fully prevent infections.
• "Rotavirus only spreads in poor countries." – It occurs globally, but outcomes are worse where healthcare is inadequate.
• "Clean homes don't get rotavirus." – The virus is extremely contagious and may spread even with basic cleanliness if hand hygiene lapses.

Seek immediate medical help if your child shows:

• Signs of dehydration (dry mouth, sunken eyes, no tears while crying)
• High fever above 102°F (38.9°C)
• Vomiting for more than 24 hours
• Blood in stool
• Lethargy or unresponsiveness

Timely medical attention can prevent complications and reduce hospital stay duration.

• What can I do at home to manage symptoms?
• When should I take my child to the emergency room?
• Can rotavirus cause long-term effects?
• Is the infection contagious to adults?
• How can I protect other children in the family?
• What are signs of worsening dehydration?

• Ensure adequate fluid intake and nutrition
• Keep their environment clean and comfortable
• Provide emotional comfort to anxious parents
• Educate caregivers about hygiene
• Ensure vaccination of siblings and other children
• Assist in managing medication and doctor visits

Rotavirus is a preventable but serious viral illness affecting millions of children globally. Early diagnosis, adequate hydration, and vaccination are key to combating this disease. With ongoing public health efforts and community education, the burden of rotavirus can be significantly reduced. Parents and caregivers should prioritise hygiene and vaccination to safeguard children’s health.