Environmental changes in the body, certain health issues, and the use of antibiotics can encourage the growth of Candida. If there is an overgrowth of Candida, it can cause an infection called candidiasis.
In this article, we discuss the signs and symptoms of Candida in stools and elsewhere in the body, as well as how to treat it.
Signs and symptoms
White, yellow, or brown mucus in the stool may indicate Candida.
Although the presence of Candida in stools can indicate an overgrowth, this is not always the case.
In fact, researchers have found Candida in around 65% of stools from healthy adults.
Most people might not know they have Candida in their stools until they become aware of the following:
- white, yellow, or brown mucus
- a white, yellow, or light brown string-like substance
- froth or foam
- loose stools or diarrhea
If people have a Candida overgrowth, they may also experience the following symptoms:
Other symptoms of a Candida overgrowth depend on where the yeast is in the body. In the sections below, we look at symptoms that may develop when Candidaoccurs in different locations within the body:
- white areas inside the mouth
- red, inflamed tissue underneath the white patches, which may bleed
- cracked corners of the mouth
- pain when swallowing
- chest pain under the breastbone
- itchy or sore vagina and vulva
- thick, white discharge
- pain during urination or sex
- burning sensation
Sometimes, Candida can spread to infect the blood. This is known as deep, or invasive, candidiasis, and it can be life threatening.
Invasive candidiasis can cause shock and organ failure. If a person who is receiving antibacterial treatment for a Candida infection has fever and chills that do not go away, they should seek immediate medical attention.
Medication use, certain health conditions, and lifestyle factors can all cause the balance of microbes and moisture levels in the body to change.
These changes can encourage the Candida yeast to grow and cause an infection.
In the sections below, we look at some possible causes in more detail:
Healthful bacteria help keep Candida in check.
Antibiotics kill good bacteria as well as bad bacteria, which can affect the balance of microbes in the body. This can cause an overgrowth of Candida.
A person with a gastrointestinal disorder may have high levels of Candida in their stool.
Some research found that people with gastrointestinal issues had high levels of Candida in their stool. These conditions included:
- inflammatory bowel disease
- ulcerative colitis
- Crohn’s disease
Many researchers believe that the inflammation these conditions cause and develop from promotes Candida growth, which then results in further inflammation.
Weakened immune system
This is because the body is less able to fight off infections.
Diabetes can increase the risk of a Candida overgrowth because high blood sugar levels encourage the yeast to grow.
Oral contraceptives may increase the risk of vaginal candidiasis.
High levels of stress may increase the risk of a Candida infection.
One study from 2010 found that exposing healthy rats to stress led to increased levels of Candida on the rats’ tongues.
Smoking can also increase the risk of a Candida overgrowth, especially in the form of oral thrush.
One study from 2006 found that in participants who smoked, 58% had Candida present in their stools, while only 29% of nonsmokers had Candida present.
Other risk factors for Candida overgrowth include the use of:
- excessive alcohol
- herb medication
A doctor will take a stool sample to determine if there is a Candida overgrowth present.
Many healthy people have Candida in their stools, so a doctor may also carry out other tests to check for an overgrowth.
They will carry out a physical examination and take a medical history to determine if antibiotic use could be causing the Candida overgrowth.
If Candida is affecting a specific area of the body, the doctor may take a skin sample from the area.
A person should talk to their doctor about possible treatment options for Candida.
A doctor may prescribe antifungal medication to treat the Candida overgrowth and return the fungi to normal levels.
Potential side effects of antifungal drugs may include feeling nauseous, vomiting, and diarrhea.
Common antifungal medication for Candida infections include:
- polyenes, such as nystatin and amphotericin B
- azoles, such as fluconazole, itraconazole, voriconazole
People can take antifungal medications orally to treat Candida infections in the mouth and esophagus.
Topical antifungal creams can treat Candida infections on the skin.
For vaginal Candida infections, antifungal medication is available as a cream, tablet, or suppository.
People with an invasive Candida infection will require intravenous antifungal medication.
Probiotics may also work to treat an overgrowth. Probiotics are live microorganisms that can help restore good bacteria in the body and restrict the growth of Candida.
People may be able to prevent a Candida overgrowth by maintaining a healthy lifestyle. For example, a person can strive to:
- keep the skin clean and dry, as fungi thrive in moist, warm environments
- only use antibiotics when necessary and as intended
- avoid or limit the intake of processed or sugary foods
- keep blood sugar levels in check, as this can help prevent Candida infection
- quit smoking or do not start
- avoid heavy alcohol consumption
People may notice an overgrowth of Candida if they find white mucus, foam, or a string-like substance in their stools.
Other symptoms of a Candida overgrowth depend on where the infection occurs in the body.
A Candida overgrowth is usually easily treatable, and with the correct treatment, it will have no long lasting health effects.
Otherwise healthy people may be able to treat a Candida overgrowth with a single dose of an antifungal medication.
Candida infections may take longer to treat and may reoccur in people who:
- are taking or have taken antibiotics over a long period
- have a weakened immune system
- have a chronic illness
If a Candida infection spreads to the blood, early diagnosis and treatment are vital to prevent the infection from spreading to major organs.
A doctor will prescribe antifungal medication, or potentially probiotics, to treat an overgrowth of Candida.
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