Rotavirus in Children: Symptoms, Treatment, and Prevention

Rotavirus Infection in Children

Rotavirus infection has likely affected millions of children for centuries, although it was not previously identified as a distinct disease. Symptoms such as fever, diarrhea, and vomiting are common to many illnesses. Rotavirus was first identified in 1973 in Australia and has been diagnosed in Lithuania since 1994. It was named because of its characteristic wheel-like appearance under the microscope.

In both developed and developing countries, rotavirus is a leading cause of acute infectious gastrointestinal disease in children. Rotavirus infection is an acute intestinal illness characterized by systemic symptoms, inflammation of the stomach and small intestine, and, particularly in children, mild upper respiratory tract symptoms such as runny nose, sneezing, and throat irritation.

What Is Rotavirus?

Rotavirus is a highly resistant, wheel-shaped virus that can survive in the environment for extended periods. At temperatures of 4–20°C, it may remain viable for several months. It is resistant to many mild household detergents but is quickly inactivated by chlorine-containing disinfectants and boiling.

Rotaviruses can be found in rivers, lakes, seas, groundwater, and even tap water. The virus is shed in large quantities in the feces of infected individuals, and infection can occur with as few as 10 viral particles. Viral shedding typically occurs during the acute phase of illness, lasting approximately 4–6 days. The high environmental resistance and low infectious dose contribute to the widespread transmission of the virus.

Transmission of Rotavirus Infection

The primary sources of infection are symptomatic children and asymptomatic carriers. Rotavirus is not transmitted from animals, as animal strains are not harmful to humans.

Transmission occurs via the fecal–oral route, most commonly through contaminated hands and surfaces. Because the virus remains viable in the environment for long periods, it can spread through objects that children frequently put into their mouths.

There is also some evidence suggesting possible respiratory transmission, similar to other viral infections, although this is not the main route. Infection may occur through contaminated food, particularly if prepared with unwashed hands or not properly cooked, as well as through contaminated water.

In group settings such as kindergartens and schools, children easily transmit the infection to one another. Breastfed infants may receive some protection through maternal antibodies; however, they can still shed the virus without showing typical symptoms, posing a risk to other vulnerable children.

Rotavirus infection is seasonal, most commonly occurring during colder months—from November to April—when the virus survives better in low temperatures. Immunity after infection is temporary, and children may become infected multiple times.

Clinical Features

Symptoms typically appear within 24–72 hours after infection. During the incubation period, the child appears healthy while the virus replicates in the body.

Three clinical forms are recognized: mild, moderate, and severe.

Moderate forms are the most common. The disease usually begins suddenly with nausea, vomiting, and diarrhea. Vomiting may occur 3–4 times per day, while diarrhea can occur up to 15–20 times per day. Stools are watery, yellowish, and may have an acidic odor. Diarrhea often lasts longer than vomiting. Abdominal pain is common at the onset of illness, and mild upper respiratory symptoms may also be present.

Fever occurs in approximately 90% of children, typically reaching 37–38°C and lasting 1–2 days, sometimes longer. Signs of intoxication, such as weakness, lethargy, and drowsiness, are common.

In moderate to severe cases, especially in infants and children under 3 years of age, rapid fluid and electrolyte loss can occur, leading to dehydration, which may be life-threatening. Infants younger than 3 months may show milder symptoms due to maternal antibodies.

Repeated infections tend to be milder. However, laboratory testing is essential for diagnosis, as similar symptoms may be caused by other pathogens.

Pharmacist Recommendations

There is no specific antiviral treatment for rotavirus infection. Early management focuses on preventing dehydration.

Oral rehydration therapy is essential. Children should be given oral rehydration solutions containing electrolytes and glucose. Beverages such as tea, juices, or fruit drinks are not suitable. Fluids should be given frequently in small amounts—15–30 ml every 5–10 minutes, or 5 ml every 2–3 minutes if vomiting occurs.

Parents should monitor signs of dehydration, including persistent vomiting, frequent diarrhea, reduced urination, dry lips, thick saliva, and changes in behavior (lethargy or irritability). In such cases, medical attention is required.

Breastfeeding should be continued. Symptomatic treatment may include medications for fever, vomiting, and bloating.

Probiotics, such as Saccharomyces boulardii, may be used as supportive therapy. This non-pathogenic yeast helps restore intestinal flora and inhibit pathogenic microorganisms. Clinical studies have demonstrated its effectiveness in reducing the duration and severity of diarrhea.

Evidence-based guidelines from ESPGHAN and ESPID recommend probiotics such as Saccharomyces boulardii and Lactobacillus rhamnosus GG as adjunct therapy alongside oral rehydration.

Prevention

Proper hand hygiene is the most important preventive measure. Rotavirus can survive on hands for up to 4 hours. Hands should be washed thoroughly with soap and, when appropriate, disinfected with alcohol-based products.

Children with symptoms should not attend school or daycare. Infected children should be isolated, use separate utensils and towels, and have their environment cleaned regularly with effective disinfectants.

Contaminated items, including diapers, clothing, and bedding, should be handled carefully and washed separately. Toys should be washed with soap and water.

Vaccination is an effective preventive measure. Rotavirus vaccines are now available and widely used in many countries, including Lithuania.