Merck Manual

Please confirm that you are not located inside the Russian Federation

honeypot link
Quick Facts

Occult Bacteremia


The Manual's Editorial Staff

Last full review/revision Dec 2019| Content last modified Dec 2019
Click here for the Professional Version
Get the full details

What is occult bacteremia?

Occult means hidden. Bacteremia is germs (bacteria) in the blood. So occult bacteremia is when bacteria are in the blood but haven't yet caused illness or symptoms other than a fever. Because the bacteria haven't yet caused sickness, the bacteremia is "hidden."

Occult bacteremia happens in babies and children under 3 years of age. After that age, bacteremia always causes symptoms.

What causes occult bacteremia?

What are the symptoms of occult bacteremia?

The only symptom is:

  • Fever higher than 102° F (38.9° C)

A baby or child who has other symptoms (such as cough, sore throat, or runny nose) has an actual infection, not occult bacteremia.

How can doctors tell if my child has occult bacteremia?

To find occult bacteremia, doctors do:

  • Blood tests

Doctors may do other tests to look for a bacterial or viral infection, such as:

The age of the child is important. Babies under the age of 3 months may need more tests and even to stay in the hospital during testing. Doctors can't always tell just by looking at very young babies whether they have occult bacteremia or a serious bacterial infection.

How do doctors treat occult bacteremia?

Doctors treat occult bacteremia with antibiotics. Your child may also be given medicine, such as acetaminophen, to reduce fever. Children under 3 months who are sent home with a fever should be seen again by the doctor in 24 to 48 hours.

Drugs Mentioned In This Article

Generic Name Select Brand Names
NOTE: This is the Consumer Version. DOCTORS: Click here for the Professional Version
Click here for the Professional Version


Others also read

Test your knowledge

Atopic Dermatitis (Eczema)
Atopic dermatitis, commonly known as eczema, is a chronic condition that causes itchy inflammation of the upper layers of skin. Eczema is especially common in people who have hay fever or asthma, and in people whose family members have these conditions. Eczema is common, particularly in urban areas and developed countries. What percentage of children and adolescents are affected by eczema?  
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID

Also of Interest

Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID