Esophageal candidiasis is a fungal infection of the esophagus — the tube that carries food from your mouth to your stomach. It is caused by a yeast called Candida albicans and most commonly affects people with a weakened immune system. In Canada, this condition is seen most often in people living with HIV, those undergoing chemotherapy, or those taking certain long-term medications. This article explains what esophageal candidiasis is, who is at risk, how it is diagnosed, and how it is treated.
What Is Esophageal Candidiasis?
Candida albicans is a type of fungus that naturally lives in your mouth and digestive tract. In healthy people, the immune system keeps it under control. However, when the immune system is weakened, this fungus can grow out of control and spread down into the esophagus.
Esophageal candidiasis is the most common cause of infectious esophagitis. After the mouth and throat, the esophagus is the second most common site in the digestive tract for a candida infection to develop. According to the World Health Organization, fungal infections like this one are a growing concern globally, especially among immunocompromised individuals.
Worldwide, approximately 10 to 15 percent of people living with HIV will develop esophageal candidiasis at some point in their lives. In the general population, the rate is much lower — between 0.32 and 5.2 percent.
Risk Factors for Esophageal Candidiasis
Esophageal candidiasis affects both men and women equally. The average age of diagnosis worldwide is around 55 years. However, certain groups face a much higher risk than others.
Conditions That Weaken the Immune System
The following conditions or situations can increase your risk of developing a candida infection in the esophagus:
HIV/AIDS — the leading risk factor worldwide
Cancer treatments such as chemotherapy or radiation therapy
Diabetes — especially when blood sugar is poorly controlled
Blood cancers such as leukaemia or lymphoma
Organ transplants — due to immune-suppressing medications taken afterward
Long-term steroid use or other medicines that suppress the immune system
Proton pump inhibitors — medications used to reduce stomach acid
Broad-spectrum antibiotics — which can disrupt the natural balance of organisms in your gut
In addition, some research suggests that smoking is also associated with an increased risk. If you already have oral thrush (a candida infection in the mouth), your chances of developing esophageal candidiasis are also higher.
Who Is Most Vulnerable in Canada?
In Canada, people who are immunocompromised — whether due to illness or medication — make up the majority of esophageal candidiasis cases. Canadians receiving cancer care, those on long-term corticosteroids, and people living with HIV are among the most at-risk groups. If you belong to one of these groups, speak with your family doctor about monitoring and prevention.
Symptoms of Esophageal Candidiasis
The symptoms of esophageal candidiasis can range from mild to severe. Some people may have only one or two symptoms, while others experience several at once. Recognising these signs early can lead to faster treatment.
Common symptoms include:
Difficulty swallowing (called dysphagia) — food or liquids feel like they are getting stuck
Painful swallowing (called odynophagia) — a sharp or burning pain when you swallow
Chest pain behind the breastbone that is not related to swallowing
A feeling of tightness or blockage in the chest or throat
Fever is a rare symptom but has been reported in some cases. Many people with esophageal candidiasis also have visible signs of oral thrush — white patches inside the mouth and on the tongue. However, the absence of oral thrush does not rule out an esophageal infection.
As Mayo Clinic notes, symptoms like painful or difficult swallowing that persist for more than a few days always warrant medical attention.
How Is Esophageal Candidiasis Diagnosed?
Diagnosing esophageal candidiasis is not as simple as a routine swab. Because Candida albicans is naturally present in the mouth and gut, finding it in a saliva or stool sample does not confirm an infection. A doctor needs more specific evidence to make a diagnosis.
Endoscopy
The most accurate way to diagnose esophageal candidiasis is through an upper endoscopy. A thin, flexible tube with a tiny camera and light source is gently passed through the mouth and down into the esophagus. The doctor can view the lining of the esophagus directly on a monitor.
During this procedure, white raised patches — similar to those seen in oral thrush — may be visible on the esophageal lining. Small tissue samples (biopsies) are also taken for laboratory analysis. Under a microscope, the presence of fungal spores and structures called pseudohyphae confirms the diagnosis.
Barium Swallow X-Ray
Another test is a barium swallow. You drink a white chalky liquid that coats the esophagus, making it easier to see on an X-ray. However, this test is less specific than endoscopy. It may miss mild infections or fail to identify the exact cause of abnormalities.
Differential Diagnosis
Your doctor will also consider other causes of esophageal symptoms. For example, other conditions that can look similar include:
Cytomegalovirus (CMV) esophagitis
Herpes simplex virus esophagitis
Eosinophilic esophagitis
Gastroesophageal reflux disease (GERD)
Pill-induced esophagitis
Radiation-induced esophagitis
Therefore, proper testing is essential to make sure you receive the right treatment.
Treatment Options for Esophageal Candidiasis
The good news is that esophageal candidiasis responds well to antifungal medications in most people. Treatment is usually effective when started promptly.
Antifungal Medications
The first-choice treatment is fluconazole, an oral antifungal tablet. It is well-tolerated and convenient to take at home. For people who cannot take oral medication, or whose infection is more severe, amphotericin B may be given by intravenous (IV) injection in a hospital or clinic setting.
Some patients — particularly those with HIV or other chronic immune conditions — may need long-term antifungal therapy to prevent the infection from coming back. Your doctor will determine the right duration of treatment based on your overall health and immune status.
Pain relief may also be prescribed to help manage discomfort during swallowing while the infection heals.
Antifungal Resistance
In some cases, the infection may not respond to standard treatment. This is known as refractory or resistant esophageal candidiasis. If that happens, alternative antifungal agents may be used. Long-term preventive (prophylactic) antifungal therapy may also be considered to reduce the risk of recurrence.
Possible Complications
If esophageal candidiasis is left untreated or poorly managed, serious complications can develop. These include:
Perforation of the esophagus (a tear in the esophageal wall)
Upper gastrointestinal bleeding
Esophageal stricture — a narrowing of the esophagus that makes swallowing difficult long-term
Spread of candida to other parts of the body (candidemia)
Malnutrition and weight loss due to difficulty eating
Sepsis — a life-threatening response to widespread infection
Fistula formation — an abnormal connection between the esophagus and airways
Furthermore, people with connective tissue disorders or glycogen storage diseases may be at higher risk of developing esophageal strictures as a complication.
Outlook and Prognosis
With proper antifungal treatment, most people with esophageal candidiasis recover well. The infection typically responds positively to first-line treatment. However, people with severely weakened immune systems may experience recurrent infections and require ongoing management.
According to Healthline’s overview of esophageal candidiasis, addressing the underlying cause of immune suppression — such as managing HIV with antiretroviral therapy — is a critical part of long-term recovery and prevention.
As a result, working closely with your healthcare team is the most effective way to manage this condition and reduce the risk of it returning.
When to See a Doctor
You should see a doctor if you experience persistent difficulty or pain when swallowing, unexplained chest tightness, or white patches in your mouth that do not go away. These symptoms should never be ignored, especially if you have a condition that affects your immune system.
In Canada, you can start by booking an appointment with your family doctor. If you do not have a family doctor, a walk-in clinic can assess your symptoms and refer you for further testing if needed. Most provinces and territories cover diagnostic procedures like endoscopy through provincial health plans when medically necessary. Check with your provincial health authority for coverage details.
Do not attempt to self-diagnose or self-treat this condition. Always consult a qualified healthcare provider before starting any treatment.
Frequently Asked Questions About Esophageal Candidiasis
What does esophageal candidiasis feel like?
Esophageal candidiasis typically causes painful or difficult swallowing, and a feeling of food getting stuck in the throat or chest. Some people also experience chest pain behind the breastbone that is not related to eating. Symptoms can range from mild discomfort to severe pain that makes eating very difficult.
Can esophageal candidiasis go away on its own?
Esophageal candidiasis is unlikely to clear up without treatment, especially in people with weakened immune systems. Antifungal medication is almost always required to resolve the infection. If left untreated, the condition can worsen and lead to serious complications such as esophageal damage or the spread of infection to other organs.
Is esophageal candidiasis contagious?
Esophageal candidiasis is not considered contagious in the way that a cold or flu would be. The infection develops from an overgrowth of candida that is already naturally present in your own body. However, the degree to which candida spreads within the body can vary from person to person depending on immune health.
How is esophageal candidiasis different from oral thrush?
Both conditions are caused by the same fungus, Candida albicans, but they affect different parts of the body. Oral thrush causes white patches in the mouth and on the tongue, while esophageal candidiasis affects the esophagus and causes swallowing problems. Having oral thrush increases your risk of developing esophageal candidiasis, but one does not always lead to the other.
Who is most at risk for esophageal candidiasis in Canada?
In Canada, people most at risk include those living with HIV/AIDS, individuals undergoing chemotherapy or radiation, and people on long-term corticosteroids or immunosuppressant drugs following an organ transplant. People with poorly controlled diabetes or those taking long-term antibiotics or acid-reducing medications are also at elevated risk. If you fall into one of these groups, talk to your family doctor about prevention.
How long does treatment for esophageal candidiasis take?
Most people with esophageal candidiasis begin to feel better within a few days of starting antifungal medication, but a full course of treatment typically lasts two to three weeks. People with chronic immune conditions may need longer or ongoing treatment to prevent the infection from recurring. Your doctor will recommend the right treatment length based on your specific health situation.
Key Takeaways
Esophageal candidiasis is a fungal infection of the esophagus caused by Candida albicans. It most commonly affects people with weakened immune systems, including those living with HIV, cancer patients, and organ transplant recipients. Main symptoms include painful or difficult swallowing and chest discomfort. Diagnosis is confirmed through endoscopy and tissue biopsy — not routine swabs alone. Antifungal medications such as fluconazole are effective for most people. Untreated infections can lead to serious complications, including esophageal damage and spread of infection. In Canada, your family doctor or walk-in clinic is the right
