Antibiotics Cause Fungal Overgrowth

You probably heard that many times before and do not think about it constantly during your healing process: antibacterial drugs actually cause serious fungal overgrowth and may induce psoriasis or other chronic inflammatory disease.


Candida albicans. Photo by Dr. William Kaplan (CDC). Year: 1969

One thing is that the antibiotics damage immune system, nervous system and overload the detoxification pathways. The another thing is that they actually help the fungal species immensely to grow since they wipe out the bacteria which would otherwise keep the fungi in check.

Fungal infection diagnosis

Do you know how do they test which fungi or bacteria is the cause of let’s say the rash you developed on your foot?

The standard procedure should be taking a nail scraping by the doctor and making the whatever fungal or bacterial organism that caused that rash grow on a medium.

However, making the fungi to grow in a Petri dish is not so easy as doing the same with the bacterial colony. That is one reason why there is so many false-negatives when testing for possible fungal infection as cause of various diseases.

However, one procedure greatly helps the chances to grow the fungi in a lab. Using the broad spectrum antibiotics in the medium to suppress the most bacteria in order to make a way for the likely present fungus to grow.

In the next photo we have the colony of dermatophyte fungus Trichophyton tonsurans which is known to cause the scalp infections invading the hair shaft. The hair then bursts and leaves just a black dot in the place of hair follicle.


Trichophyton tonsurans from scalp scraping on Sabouraud’s dextrose agar with gentamicin, cycloheximide and chloramphenicol. Photo by James Scott.

Gentamicin, cycloheximide and chloramphenicol are used in Petri dish in order to suppress the bacteria and some types of fungi. This will create the great growing conditions for dermatophyte fungi and yeasts.

Now imagine how powerful the antibiotics are in suppressing the bacteria and supporting the fungi in their growth. The results in Petri dish are usually visible in 24-48 hours of incubation.

Can you even imagine how detrimental the antibiotics are for the human body? Many people take them routinely for months every year.

The doctors are pumping the antibiotics to young children who don’t have fully developed immune system. How much it takes for the fungal infection to take over the control in their developing bodies?

Then we can’t be surprised that so many children suffer from so called “autoimmune” diseases like asthma, atopic eczema, psoriasis; mental disorders – depression, OCD, ADHD, ADD, anxiety; and classic fungal rashes.

How does the body protect itself against the fungi?

The first line of defense and the most important is stomach acid – it should destroy the fungal pathogens before they could pass into the small intestine. Even after that if there is a healthy flora in the small intestine and colon; the probiotic bacteria should suppress the growth of fungal species.

Another part of the protection is bile flow which should clean up the whole small intestine.

However, if we take antacid drugs, take antibiotics and other drugs all those defensive mechanisms break down.

How is that possible?

  • Antacid drugs – shut down the stomach acid production. The food goes into the small intestine carrying the fungal spores.
  • Antibiotics – wipe out the bacteria in colon and small intestine so there are no organisms that would keep the fungi in check.
  • Other drugs – cause hormonal imbalances, suppress the bile flow and overload the liver’s detoxification capability. Imbalanced body with low bile flow and overloaded detoxification systems is easy to be invaded by fungi. Candida albicans is one of the

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