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Difference Between Chlamydia and Yeast infection

Chlamydia is a bacterium that causes an STD or pneumonia illness in people. A yeast infection is an illness that is caused by Candida albicans yeast.


What is Chlamydia?

Definition of Chlamydia:

Chlamydia is the genus name for a group of bacteria that cause an STD infection or a type of pneumonia in people.

Type of illness caused:

Chlamydia trachomatis is a species that is responsible for a sexually transmitted disease in men and women and can be transmitted to infants causing illness. Chlamydia pneumoniae is a species that is implicated in causing a type of pneumonia which is often found in children.

Symptoms of Chlamydia:

Symptoms depend on which species of Chlamydia is involved.  In the case of C. trachomatis, the urethra of males becomes inflamed and painful, while in females, the urethra and cervix are affected and become inflamed. In these cases, there may also be a discharge and burning sensation when urinating. C. pneumoniae causes respiratory symptoms typical of pneumonia.

Diagnosis for Chlamydia:

An individual’s symptoms may lead a doctor to believe that they have a Chlamydia infection. However, the best method to use for accurately diagnosing either of the common Chlamydia infections is the molecular techniques of nucleic acid amplification tests (NAATs). 

Risk factors and treatment:

Sexual activity, especially if with many partners, increases the risk of getting infected by C. trachomatis. This infection is most often treated with the antibiotics doxycycline or azithromycin. Children and older people who are in crowded conditions are at increased risk of catching C. pneumoniae since it is spread by respiratory secretions of sick people. Antibiotics are given to treat this condition as well.


What is Yeast Infection?

Definition of Yeast infection:

A yeast infection is an infection that is caused most often by a species of yeast that is known as Candida albicans. Usually, the infection is limited to the mucous membranes and to the skin unless the person has a very weak immune system. The yeast grows well in moist and warm conditions and where skin comes together.

Type of illness caused:

Most often, the yeast infection does not cause too much of a problem except in people who have a compromised immune system. It causes some problems and irritation to the genital area, mouth and/or the skin where there are folds of skin.

Symptoms for Yeast infection:

Symptoms can include itching, a rash, pustules and in the case of vaginal infections, a white discharge. Candida in the mouth will produce white plaques and in babies with candida, a diaper rash is produced.


The presence of typical symptoms may lead to suspicion that you have a yeast infection. The diagnosis though can be confirmed by microscopic examination of a sample. Candida albicans can be detected by placing a culture on a microscope slide and adding a solution of 20% potassium hydroxide. The slide is then examined for the presence of fungal structures such as budding cells or hyphae.

Risk factors and treatment:

Risk factors for candidiasis or a yeast infection include having poor hygiene, taking antibiotics which cause an imbalance in the microbes that are present. Babies who are not changed often enough may develop diaper rash. Oral antifungal medication and antifungal powders can be used. Powders that are often useful in treating yeast infections include fluconazole and miconazole.


Difference between Chlamydia vs. Yeast infection?

  1. Definition

Chlamydia is a bacterium that causes various infections in people. A yeast infection is an infection that is caused by a species of yeast known as Candida albicans.

  1. Causative agent

The microbe causing chlamydia infections is a bacterium. The microbe causing yeast infections is a type of fungus that is known as yeast.

  1. Cell type

The Chlamydia causing chlamydial infection is a type of prokaryotic cell. The Candida causing yeast infection is a type of eukaryotic cell.

  1. Intracellular parasite

Chlamydia is a parasite that has to live inside the cell of its host, so it is an intracellular parasite. Yeast is a parasite that lives outside the host’s cells and thus is not an intracellular parasite.

  1. Symptoms for  Chlamydia vs. Yeast infection

The symptoms of having an infection caused by Chlamydia depend on which species it is. For C. trachomatis there may be burning on urination, pain, and a discharge. For C. pneumoniae various respiratory symptoms will be present. The symptoms of having a yeast infection include itching, the presence of a rash or pustules, and a white discharge if it is in the vagina.

  1. Diagnosis

The diagnosis of Chlamydia is by a positive result when nucleic acid amplification tests (NAATs) are done. Diagnosis of a yeast infection is by microscopic examination of a slide of the organism to which potassium hydroxide has been added to show fungal features.

  1. Risk factors

A risk factor for getting C. trachomatis include having many sexual partners, and for C. pneumoniae being in crowded conditions is a risk factor and if you are a child or elderly. Risk factors for yeast infection include, not changing a baby’s diaper often enough, having poor hygiene or taking antibiotics.

  1. Treatment for  Chlamydia vs. Yeast Infection

The treatment of Chlamydia involves using antibiotics such as doxycycline or azithromycin. The treatment of a yeast infection is by using antifungals such as miconazole or fluconazole.

Table comparing Chlamydia vs. Yeast infection


Summary of Chlamydia vs. Yeast Infection

  • Chlamydia is a bacterium that causes various types of infection in people.
  • A yeast infection is a problem that is caused by the yeast Candida albicans. 
  • A Chlamydia infection is best treated using various antibiotic medications.
  • Yeast infections are best treated using antifungal medicines.


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1 Comment

  1. Can a yeast infection cause chlamydia?

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References :

[0]Image credit: https://commons.wikimedia.org/wiki/File:Yeast_Infection.png

[1]Image credit: https://pixnio.com/science/microscopy-images/psittacosis-chlamydia-psittaci/chlamydia-psittaci-bacteria-close-up

[2]Aaron, Denise M. “Candidiasis (Mucocutaneous)”. Merckmanuals. Merck & Co., 2018, https://www.msdmanuals.com/professional/dermatologic-disorders/fungal-skin-infections/candidiasis-mucocutaneous?query=yeast%20infection

[3]Hammershlag, Margaret R. “Chlamydia”. Merckmanuals. Merck & Co., 2018, https://www.msdmanuals.com/professional/infectious-diseases/chlamydia-and-mycoplasmas/chlamydia?query=chlamydia

[4]Ponka, David, and Faisal Baddar. "Microscopic potassium hydroxide preparation." Canadian Family Physician 60.1 (2014): 57-57.

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