Worm infections in children: causes, symptoms & treatment in Bangladesh

What is a worm infection in children?

A worm infection is when parasitic worms get inside a child’s body and live mostly in the digestive system. Depending on the type of worm and the severity of infection, the child may suffer mild digestive discomfort or more obvious nutritional and health problems.

The usual soil-transmitted worms of humans are the roundworm, the whipworm, and the hookworm. Children are particularly vulnerable because they frequently play on the ground, touch different surfaces, and may put unwashed hands or objects in their mouths.

Common types of worms in children

Not every childhood worm infection is caused by the same parasite. Knowing the likely type can become important when symptoms continue despite treatment or when a doctor suspects a particular infection. Some commonly encountered intestinal worms include:

• Roundworm (Ascaris): Can cause abdominal discomfort, poor appetite and, in very heavy infections, intestinal blockage.
• Hookworm: Can attach to the intestinal wall and contribute to blood loss and anaemia.
• Whipworm: May cause abdominal pain, diarrhoea and nutritional problems when infection is significant.
• Pinworm or threadworm: Often causes intense itching around the anus, especially at night.
• Strongyloides: A less common intestinal parasite that may require different diagnostic and treatment approaches.

What causes worm infections in children?

Children usually become infected when worm eggs or larvae enter the body through contaminated food, water, soil, hands, or—in the case of some parasites—through the skin. The infection is therefore closely connected with hygiene and environmental exposure rather than simply with a child eating too many sweets.

Understanding how worms spread is important because medicine may remove an existing infection, but exposure to the same source can lead to reinfection.

1. Playing in contaminated soil

Children naturally love playing outdoors. If soil has been contaminated with parasite eggs and a child later puts an unwashed hand in the mouth, infection may occur. This is one reason proper handwashing after outdoor play is so important.

2. Not washing hands before eating

Young children often eat with their hands. If they do not wash properly after using the toilet, playing outdoors, or touching contaminated surfaces, worm eggs may be swallowed with food. Parents should therefore teach handwashing as a daily habit rather than only reminding children when their hands look dirty.

3. Eating unwashed fruits or vegetables

Fruits and vegetables can carry contaminated soil or microscopic parasite eggs on their surface. Eating them without adequate washing, peeling, or cooking may increase exposure. Fresh produce should be cleaned carefully before it is served to children.

4. Drinking contaminated water

Unsafe water may contain organisms capable of causing intestinal infections, including parasitic infections. Using a safe source of drinking water and maintaining hygienic food preparation are therefore important parts of prevention.

5. Walking barefoot on contaminated soil

Hookworm larvae can penetrate the skin. A child who regularly walks barefoot on contaminated ground may therefore be exposed even without swallowing parasite eggs.

Encouraging children to wear sandals or shoes outdoors can help reduce this risk.

6. Poor toilet and sanitation practices

When human faeces contaminate soil or water, some intestinal worms can continue their life cycle and later infect another person. Proper toilet use, safe waste disposal and good sanitation therefore protect not only one child but the wider family and community.

Common symptoms of worm infection in children

The symptoms of worm infection are not always obvious. A child with a mild infection may appear completely healthy, while heavier infections are more likely to cause digestive symptoms, weakness, nutritional problems and impaired physical development. Parents should look at the overall pattern rather than assuming that one symptom alone confirms worms. Common Symptoms Parents May Notice

• Repeated abdominal pain
• Abdominal bloating or discomfort
• Nausea
• Reduced appetite
• Diarrhoea or changes in bowel habits
• Weakness or unusual tiredness
• Poor weight gain
• Weight loss in some children
• Pale appearance or anaemia
• Itching around the anus, particularly at night
• Disturbed sleep
• Irritability
• Worms or worm-like material visible in stool
• Nutritional problems
• Reduced growth when infection is severe or persistent

Can worm infection affect a child’s growth and nutrition?

A chronic or large worm infestation can affect more than the digestive tract. Some parasites interfere with the intake or absorption of nutrients; hookworm can cause chronic intestinal blood loss and contribute to iron-deficiency anemia For a growing child, these effects become more important when infection is heavy, repeated or left untreated. Possible consequences may include:

• Poor weight gain
• Nutritional deficiency
• Reduced appetite
• Iron-deficiency anaemia
• Weakness and tiredness
• Reduced physical activity
• Difficulty maintaining healthy growth

Note: However, poor growth should never automatically be blamed on worms. Nutritional deficiency, chronic digestive diseases, food-related problems and many other medical conditions can cause similar signs. If a child continues to lose weight or fails to grow appropriately despite treatment, a pediatric assessment is important.

Worm infection treatment for children in Bangladesh

Treatment depends on the child’s age, weight, symptoms and suspected type of worm. While deworming medicines are widely available in Bangladesh, parents should be careful about repeatedly giving medicine without understanding why symptoms keep returning. The goal of treatment should be to clear the infection safely while also reducing the chance of reinfection.

Deworming medicine

Albendazole and mebendazole are among the medicines recommended internationally for common soil-transmitted worm infections. However, the appropriate medicine, dose and timing for an individual child should be decided according to factors such as:

• Age
• Weight
• Type of suspected parasite
• Severity of symptoms
• Previous treatment
• Other medical conditions

Note: Do not repeatedly give deworming medicine solely because a child has stomach pain. Abdominal pain can have many causes, and unnecessary medication can delay the diagnosis of the actual problem.

Treating associated problems

Some children need more than an anti-worm medicine. For example, a pediatrician may also need to assess and manage:

1. Anaemia
2. Iron deficiency
3. Poor appetite
4. Malnutrition
5. Dehydration from diarrhoea
6. Poor growth
7. Other gastrointestinal conditions

Treatment for other types of worm infection

Not all intestinal parasites respond to exactly the same medicines. Strongyloides, for example, requires a different treatment approach from the commonly grouped soil-transmitted worms.

This is another reason recurrent or unusual symptoms deserve medical evaluation instead of repeated self-treatment.

How to prevent worm infection in children?

Deworming medicine can remove worms already affecting a child, but it cannot stop the child from becoming infected again if exposure continues. Prevention therefore depends heavily on everyday family habits. A few simple routines can significantly reduce contact with contaminated soil, food and hands.

Teach children to wash their hands:

• Before eating
• After using the toilet
• After playing outside
• After touching soil
• Before handling food

Dirt and microscopic contaminants can remain under long fingernails. Regular nail trimming also helps discourage nail-biting and makes proper hand cleaning easier.

Raw fruits and vegetables should be carefully washed before children eat them. Food should also be prepared on clean surfaces with clean utensils.

Make sure children drink water from a reliable and hygienic source. The same applies to water used to wash or prepare food.

Shoes or sandals provide an important barrier between a child's feet and contaminated soil, particularly for preventing hookworm exposure.

Children should learn to use sanitary toilets and wash their hands afterward. Keeping bathrooms and toilets clean can also reduce transmission of many gastrointestinal infections.

When pinworm is suspected, careful personal and household hygiene can become especially important because eggs may contaminate hands, clothes and bedding.

When should parents consult a pediatrician?

A mild and uncomplicated worm infection may respond quickly to appropriate treatment. But persistent or severe symptoms can indicate either a heavier infection or a completely different gastrointestinal condition. Parents should therefore pay attention to symptoms that continue, worsen or affect the child’s normal growth and activity. Consider consulting a child specialist if your child has:

• Repeated or persistent abdominal pain
• Significant abdominal swelling
• Recurrent vomiting
• Persistent diarrhoea
• Blood in stool
• Marked weakness or paleness
• Unexplained weight loss
• Poor weight gain or delayed growth
• Repeated worm infection despite treatment
• Persistent anal itching that affects sleep
• Worms repeatedly appearing in stool
• Severe loss of appetite
• Symptoms that do not improve after treatment

Consult Prof. Dr. Salahuddin Mahmud for your child’s digestive health

Repeated stomach pain, poor appetite or slow weight gain should not automatically be dismissed as “just worms.” When symptoms continue despite deworming or repeatedly return, identifying the actual cause becomes important for your child's growth and long-term health.

For assessment and treatment of worm infections, recurrent abdominal symptoms, poor growth, and other digestive problems in children, consult Prof. Dr. Salahuddin Mahmud, Professor of Pediatric Gastroenterology, Hematology and Nutrition, and an experienced child specialist in Bangladesh. His expertise can help identify the underlying cause and provide appropriate treatment for your child.