Swimmer's Itch ~ Calvin College, Grand Rapids, Michigan
What is Swimmer's Itch? Causes Report a Case Reported Cases/Location Control Program Photo Gallery Swimmer's Itch FAQ Contact

What is swimmer's itch?

Swimmer's itch is a dermatities that develops on parts of the body that have been exposed to lake water containing certain larval forms of flatworms. Reddened spots, called papules, form on the body within hours after exposure and may itch intensely for several days before subsiding. After approximately one week, the symptoms usually disappear. In severe cases, a person can develop a fever, become nauseated and spend several sleepless nights suffering from intense itching.

Symptoms
Swimmer's Itch
Insect Bite
Poison Ivy
Chiggers
Origination
Water
Anywhere
Ground
Grassy areas
Location on body
Body parts exposed to water
Random
Arms and legs
Lower extremities (waist, ankles)
Appearance
Discrete papules
Discrete papules
Rash (possibly blisters)
Discrete papules
Duration
4-7 days
1-3 days
3-21 days
4-7 days
Intensity of itching
Severe
Mild
Severe
Severe

For more information on swimmer's itch contact:

Curtis L. Blankespoor
Calvin College Biology Department
123 DeVries Hall / 1726 Knollcrest Circle, SE
Grand Rapids, Michigan 49546-4403
616.526.6498 / fax 616.526.6501
blankespoor@calvin.edu

Ronald L. Reimink
Science Department Hudsonville High School
5037 32nd Avenue
Hudsonville, Michigan 49426
616.669.1500 x20126 / fax 616.669.4891
reiminkron@gmail.com

Larvae