VZV, HSV, HPV — Oh My!

VZV, HSV, HPV — Oh My Indeed!

A point of confusion for many patients (because it is legitimately confusing) is the difference between VZV, HSV, and HPV viruses.  First, let’s clarify these acronyms.

VZV = Varicella Zoster Virus

HSV = Herpes Simplex Virus

HPV = Human Papillomavirus

So the reason it is confusing is because A) the acronyms sound somewhat similar, B) VZV and HSV are both part of the Herpes family of viruses (Herpesviridae), and C) VZV can cause a diagnosis called herpes zoster which has the word herpes in it. Herpes zoster is not caused by the Herpes Simplex Virus.

So let’s do a quick synopsis of each one.

VZV = Varicella Zoster Virus

Conditions it causes: Chickenpox, Herpes zoster – aka Shingles

Chickenpox is something most of us are familiar with (at least those of us old enough to remember having had it). These days, most kids are immunized to it in the US when they are young.  It is characterized by little blisters with some surrounding redness, along with fever and feeling tired.  For those who want a descriptive analogy of what the rash looks like, check out “dew drops on a rose petal.”

Herpes zoster, aka Shingles, is something that occurs most frequently in adulthood. Classically, it occurs on one side of the body, with the same little blisters which can be grouped together. It can be burning, stinging, painful or itchy.  There is a vaccine that is recommended for most people over 60 years of age since the risk of getting this rash is more frequent with increased age.  Shingles occurs because the varicella zoster virus reactivates.  After initial exposure, the virus lays dormant in the nerves and with some trigger or waning immunity, it can reactivate and case shingles.

HSV = Herpes Simplex Virus

Conditions it causes: Cold sores/oral herpes/herpes labials/fever blisters, Genital herpes/Anogenital herpes, herpes simplex

There are two types of the herpes simplex virus – HSV1 and HSV2.  Generally, HSV1 favors the oral area and HSV2 favors the genital area.  That being said, either could be found in either place.  Herpes can also infect skin besides the oral area or the genital area.

Like the Varicella Zoster Virus, the herpes virus can reside in the nerves  after initial infection. Then, it can reactivate (e.g. during times of trauma, stress, decreased immunity or otherwise), and show up.  Like shingles, it also shows up with little blisters. These tend to be small clustered blisters.  More on herpes in a future post to follow.

HPV = Human Papillomavirus

Conditions it causes: Warts including warts on the skin and genitalia, can also cause cancer like cervical cancer, penile cancer, and other cancers

Most commonly, the HPV virus causes common warts. These could be on the hands, fingers, soles of feet, or skin otherwise.  However, they can also cause cancers in various areas including the anal canal and the cervix, vulva and vagina in women and the penis in men (thus the need for Pap smears, and the development and recommendation of the HPV vaccine).  There are many different strains of HPV, with some considered relatively benign strains (e.g. those commonly causing warts) and some considered higher risk strains (e.g. those responsible for HPV induced cancers).  Check out this link from the CDC for more info and more on HPV in a future post to follow.

 

 

Pesky foot warts

Warts on the bottom of your feet are called plantar warts and they’re notoriously hard to get rid of. If you’ve had them before (and still have them), then you certainly know what I’m talking about. In addition to being an eyesore, they can be quite uncomfortable and feel like you have a pebble in your shoe.

So what are these warts caused by? They’re caused by viruses (human papillomavirus to be specific) that infect the skin and cause the skin to grow thick and warty.

How do you get rid of them? Sometimes they’ll go away on their own but it’s hard to predict if it’ll disappear and when. Some common home remedies are duct tape or salicylic acid plasters which are available at your local drugstore. You may want to try to carefully pare down the wart or use a pumice stone on the wart to make it a little flatter before applying either of these treatments. If you see a doctor, they might try injecting the wart, applying a medication to the wart or potentially freezing or burning the wart.