When you hear the word fungus, you
may think of mushrooms growing on a wet tree trunk, mold on old bread,
or mildew at the back of the refrigerator. These are perhaps the most
well-known forms of fungi (more than one fungus), but did you know that
there are up to 1.5 million species of fungi, approximately 300 of which
can cause illness in people?
Is There a Fungus Among Us?
Fungi in the form of yeast, mold, or mildew are found just about
everywhere, including in the air, in soil, on plants and trees and in
water. Some types live on the human skin. Fungi thrive in cool moist
areas like the basement and in between walls.
Fungi grow by shedding tiny spores (think of plant seeds) in the air.
These spores can land on your skin or you can inhale them. There are
higher concentrations of fungal spores in the air in certain locations
that are moist, cool and dark, such as a construction or demolition
sites, old barns, or dark caves.
What’s a Fungal Infection?
Since fungi can be inhaled or live on your skin, fungal infections can
occur in the lungs or on the skin. Most infections, however, do not go
beyond the skin, and are termed “superficial.” These superficial fungal
infections can affect areas like nails, skin and hair, and might include
athlete’s foot or vaginal yeast infections. Fungal skin infections are
generally harmless, and can be treated with medication.
It’s important to note that most people can breathe in fungal spores
without getting an infection; however, those with weakened immune
systems or lung disease can more easily develop fungal infections in the
lung, blood or other organs including the sinuses, liver, spleen, and
brain. Examples of people with weakened immune systems include those
with HIV/AIDS or cancer, who are hospitalized, or are taking medications
that suppress the immune system (e.g., steroids or chemotherapy).
Fungal infections of the blood, lung or other organ are called
“systemic” infections and are generally more serious than superficial
Common Fungal Skin Infections
Tinea is a common group of fungal skin infections that can affect areas
such as the feet, groin and scalp. Tinea infections are easily spread
from person to person, from touching someone who has the infection or by
touching surfaces where the fungus is present (e.g., shower floors,
areas around swimming pools, and locker rooms). Some fungal infections
are caused by a type of yeast, Candida. It can affect areas such as the
skin, mouth, throat, and genitals. It especially occurs in areas where
it is warm and moist, including the armpits, under the breasts, behind
the knees, and the groin.
Here are some common superficial fungal infections:
- Oral thrush: a yeast infection that causes white patches in the mouth or throat.
- Vaginal yeast infection: an itchy infection of the vagina that can cause white cottage-cheese like discharge.
- Diaper rash: a fungal infection that infects the skin on a
baby’s bottom causing red irritation usually due to warm and moist
conditions inside the diaper.
- Athlete’s foot: a fungal infection on the skin of the feet, especially between the toes.
- Jock itch: an infection that occurs on the groin or upper thigh.
- Nail infection: a fungal infection of the fingernails or
toenails. The nails become thick, yellow or white in color and are more
prone to crack or break.
Superficial yeast and fungal infections are generally not a serious
problem in healthy people, but they can occur easily in anyone, and can
be very annoying. To learn about the different types of fungal
infections, please visit the websites below under Take the Next Step.
Treating Fungal Infections
If you aren’t sure if your skin condition is due to a fungal infection,
consult your healthcare provider. Your doctor or pharmacist can
recommend over-the-counter antifungal treatments (usually ointment or
cream). But know that prescription treatments (ointment, cream or
medicines you take by mouth) may be needed to treat stubborn fungal or
yeast infections. If you have or think you may have a fungal infection,
be sure to see your doctor and/or pharmacist.
What You Can Do To Prevent Superficial Infections
Anyone can get a fungal infection, especially people with weakened
immune systems. Moist, unclean, cool and unaired areas on our body can
become fertile ground to develop superficial fungal infection. This may
include your toenails. It’s good to know what to do to prevent them.
Here are some things you can do to prevent fungal infections from recurring:
- Maintain good overall hygiene, including oral hygiene (to help prevent thrush). Keep your skin clean and dry
- Keep your feet clean, cool and dry. Wear clean socks and change them daily. Wear shoes that allow your feet to “breathe”
- Do not walk barefoot in public places, such as showers or gym locker rooms
- Trim your fingernails and toenails to keep them clean and short
- Wash your hands after touching people or animals. Fungal infections are contagious
- If you think your pet has ringworm, have your veterinarian check for and treat the condition