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Viremia is a medical condition where enter the and hence have access to the rest of the body. It is similar to bacteremia, a condition where bacteria enter the bloodstream. (2025). 9780838585290, McGraw Hill. ISBN 9780838585290 The name comes from combining the word "virus" with the Greek word for "blood" ( haima). It usually lasts for 4 to 5 days in the primary condition.
Usually secondary viremia results in higher viral shedding and viral loads within the bloodstream due to the possibility that the virus is able to reach its natural host cell from the bloodstream and replicate more efficiently than the initial site. An excellent example to profile this distinction is the rabies virus. Usually the virus will replicate briefly within the first site of infection, within the muscle tissues. Viral replication then leads to viremia and the virus spreads to its secondary site of infection, the central nervous system (CNS). Upon infection of the CNS, secondary viremia results and symptoms usually begin. Vaccination at this point is useless, as the spread to the brain is unstoppable. Vaccination must be done before secondary viremia takes place for the individual to avoid brain damage or death.
Passive viremia is the introduction of viruses in the bloodstream without the need of active viral replication. Examples include direct inoculation from mosquitoes, through physical breaches or via blood transfusions.
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