Clinical Reference Systems: Pediatric Advisor 10.0
Spanish version
Fifth Disease (Erythema Infectiosum)
DESCRIPTION
- Your child has a bright red or rosy rash on both cheeks
for 1 to 3 days ("slapped cheek" appearance).
- The rash on the cheeks is followed by a pink lacelike or
netlike rash on the arms and legs (mainly on the thighs
and upper arms).
- The "lacy" rash comes and goes several times for 1 to
3 weeks.
- Your child has a low-grade fever (less than 101ƒF, or
38.4ƒC) or no fever at all.
SIMILAR CONDITIONS
Fifth disease was so named because it was the fifth pink-red
infectious rash to be described by physicians. The other
four are:
Scarlet Fever
Measles
Rubella
Roseola
CAUSE
Fifth disease is caused by the human parvovirus B19.
EXPECTED COURSE
This is a very mild disease with either no symptoms or a
slight runny nose and sore throat. The lacelike rash may
come and go for 5 weeks, especially after warm baths,
exercise, and sun exposure.
HOME CARE
- Treatment for the child
No treatment is necessary. This distinctive rash is
harmless and causes no symptoms that need treatment.
- Risk to the unborn babies of pregnant women
If a pregnant woman is exposed to a child with Fifth
disease, she should see her obstetrician. An antibody
test will be done to see if the mother already had the
disease and is therefore protected. If not, the
pregnancy will need to be monitored closely. If she
does not have antibodies against the disease, the
pregnancy will need to be monitored closely. Some
babies develop complications if they were infected with
Fifth disease before birth. Ten percent develop severe
anemia and 2% may die. Birth defects, however, are
never a result of this virus.
- Contagiousness
Exposed children will come down with the rash in 10 to
14 days. The disease is contagious during the week
before the rash begins. Therefore, exposed children
should try to avoid contact with pregnant women, but
that can be difficult. Once a child has the bright red
or lacy rash, he is no longer considered contagious and
does not need to stay home from day care or school.
- Adults with Fifth disease
Most adults who get Fifth disease develop just a mild
pinkness of the cheeks or no rash at all. Adults
develop joint pains, especially in the knees, more often
than a rash. These pains may last 1 to 3 months.
Taking ibuprofen usually relieves these symptoms. An
arthritis workup is not necessary for joint pains that
occur after exposure to Fifth disease.
CALL YOUR CHILD'S PHYSICIAN DURING OFFICE HOURS IF:
- Your child develops a fever over 102ƒ F (38.9ƒ C).
- You have other concerns or questions.
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