About Intestinal Parasite Infection with Hookworm
A hookworm intestinal infection (hookworm disease) is a parasitic infection caused by hookworms. Hookworms are a type of parasite that live in the intestines of humans. The two main species of hookworm that infect humans are ancylostoma duodenale and necator americanus. These parasites enter the body through the skin, usually when a person walks barefoot in areas where the larvae are present. Hookworm infections are more common in tropical and subtropical regions with poor sanitation practices.
Symptoms of hookworm infections can include itchiness at the site where the larvae entered the body, as well as abdominal pain, diarrhea, weight loss, anemia, and other associated symptoms. The infection can be diagnosed through stool (feces) tests or blood tests. Treatment for hookworm infections involves medications that target and eliminate the parasites from the body. It's important to seek medical attention for proper diagnosis and treatment.
Disease mechanisms of hookworm intestinal infections include the following:
- Hookworm infections trigger an immune response.
- During the first stage of infection, elevated levels of immune cells such as immunoglobulin E (IgE), interleukin 5, and eosinophilia are common.
- The inflammatory response, characterized by eosinophilia and mastocytosis, targets the adult hookworm or migrating larvae.
- Symptoms include intense itching at the site of larval penetration and a skin rash.
- Pulmonary migration of larvae can lead to eosinophilic pneumonia with cough, dyspnea, and hemoptysis (coughing up blood).
- Direct oral infection of hookworms can cause Wakana disease, presenting with nausea, fever, vomiting, cough, shortness of breath, and hoarseness.
- Once established in the small intestine, hookworms burrow their teeth into the mucosa, causing blood loss.
Risk factors for hookworm intestinal infections include:
- Poor sanitation: Lack of proper sanitation facilities increases the risk of hookworm transmission.
- Unhygienic practices: Improper waste disposal methods like open-field dumping or burying wastes can contribute to infection transmission.
- Shoe-wearing habits: Walking barefoot in areas where hookworms are common increases the risk of infection.
Early symptoms of hookworm intestinal infections include:
- Mild epigastric (upper abdominal) discomfort
- Pallor (pale skin)
- Vomiting
- Diarrhea
- Mild anemia (low red blood cells)
Other symptoms that may occur with later stages, progression, or higher severity of hookworm intestinal infections include:
- Anemia (caused by long term intestinal blood loss)
- Abdominal (stomach) pain
- Diarrhea
- Loss of appetite
- Weight loss
- Stunted growth and mental development in severe and chronic infections
It's important to note that while a light infection may cause no symptoms, heavy infection can lead to more severe symptoms. Additionally, hookworms can cause other symptoms outside of the intestines, such as asthma, eye pain, insomnia, dry skin, and hair. If you suspect you have a hookworm infection or experience any of these symptoms, it's essential to speak with a healthcare provider for an accurate diagnosis and appropriate treatment.
To diagnose hookworm intestinal infections, the following examinations, tests, and procedures are commonly performed:
- Stool examination: The most frequently used method is the examination of stool samples for the presence of hookworm eggs.
- Gastrointestinal endoscopy: This procedure involves inserting a flexible tube with a camera into the digestive tract to visualize any hookworms present in the intestines. It can provide direct evidence of infection but is rarely used.
To determine the stage or severity of a hookworm intestinal infection, additional examinations, tests, and procedures may be performed:
- Quantitative fecal examination: This method evaluates the number of hookworm eggs per gram of stool using techniques like FLOTAC or McMaster methods. It helps assess the intensity of infection.
- Blood tests: Blood tests can detect specific antibodies (proteins made by your body to fight off an infection) against hookworm antigens (foreign substances in the body that cause your immune system to fight against them), indicating an ongoing or past infection. These tests are useful for determining past exposure to hookworms.
- Molecular testing: Molecular testing such as polymerase chain reaction (PCR) tests (tests for the presence of genetic material to diagnose an infection)
Remember that these are general descriptions and may vary based on individual circumstances. It's important to speak with your healthcare provider for specific diagnostic recommendations.
The goals of treatment for hookworm intestinal infections include:
- Eliminating the parasitic worms from the body
- Reducing symptoms and complications associated with the infection
- Preventing the spread of infection to others
The recommended medications for treating hookworm intestinal infections are anthelminthic drugs, such as albendazole and mebendazole. These medications work by killing the hookworms in the intestines and helping to eliminate them from the body. Treatment typically lasts for 1-3 days.
In addition to medication, other treatments and health behavior changes that may be recommended include:
- Iron supplements: If the infected person has anemia, iron supplements may be prescribed to help restore normal levels of iron in the body.
- Mass deworming for high-risk groups
- Wearing shoes
- Washing hands with soap and water after going to the toilet and before handling food
- Washing, peeling and cooking raw vegetables
It is important to note that these recommendations are general and may vary depending on individual circumstances. It is always best to speak with a healthcare provider for personalized advice.
Medication dosing (how and when medication is taken) may be affected by many factors. Check with your healthcare provider about dosing for your individual situation.
Other side effects can occur. Check with your healthcare provider or read the information provided with your medication for additional side effect information.