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Old 09-21-2016
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Default is this a mistake in the first aid?

quick review, P630

Child with fever later develops red rash on face that spreads to
body:
Erythema infectiosum/fifth disease (“slapped cheeks”
appearance, caused by parvovirus B19

isn't this HHV6- roseola infantum-exanthema subitum?




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Old 09-21-2016
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Nope, its correct. Fifth disease begins as a fever, later causing a "slapped cheek" rash that spreads to the trunk to form a reticular rash.
By the time the rash appears, the child is no longer infectious.
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Old 09-21-2016
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Default Hi, thanks for replying,

so how can I differentiate these 2 diseases?
are they very similar or am I missing something?

Thanks again
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Old 09-21-2016
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Quote:
Originally Posted by PapaJoe View Post
so how can I differentiate these 2 diseases?
are they very similar or am I missing something?

Thanks again
Parvovirus B19 causes fifth disease/erythema infectiosum in children which presents with fever and a characteristic slapped cheek rash followed by a fine reticular rash on the trunk.
It can have a different presentation in fetuses and adults though. In fetuses, it can cause pure red cell aplasia, aplastic crisis or even hydrops fetalis which can cause them to be still born.
In adults, it presents very similarly to Rheumatoid arthritis.
Parvovirus B19 can also cause aplastic crisis in individuals with Beta Thalessemia Major, Hereditary spherocytosis and Sickle cell disease.

Human Herpes Virus 6/7 on the other hand causes Exanthem subitum (also called Roseola infantum) which presents with rash, high fever and febrile seizures.

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Old 09-21-2016
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Quote:
Originally Posted by PapaJoe View Post
so how can I differentiate these 2 diseases?
are they very similar or am I missing something?

Thanks again
Parvovirus B19 - single stranded DNA virus - three subgroups affected

1. In utero - hydrops fetalis(due to red cell appasia)
2. Infants - Slapped cheek appearance(rash) and "concurrent" fever
3. Adults - Migratory polyarthritis with fever

Bonus - Causes red cell aplasia in patients with sickle cell disease/ beta thal/ hereditary spherocytosis

HHV-6 - Roseola - dsDNA virus

Cause high fever in infants which is followed by whole body rash

Diff - Roseola - the rash and fever is doesn't happen simultaneously - rash occurs after the fever is over

Parvovirus B19 - concurrent rash + fever
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Old 09-22-2016
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and roseola occurs in less than 2 years old babies.?
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Old 09-22-2016
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Quote:
Originally Posted by virgo32 View Post
and roseola occurs in less than 2 years old babies.?
Yeah thats true - epidemiological data suggests

Roseola occurs in <2years old
While Erythema infectiosum is a disease of foetus, children(eg: 5-11years approx) and adults
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