Current efficacy of postexposure prophylaxis against measles with immunoglobulin

Area of Science:

• Pediatrics
• Immunology
• Infectious Diseases

Background:

• Measles is a highly contagious viral illness.
• Postexposure prophylaxis is crucial for preventing measles transmission.
• Intramuscular immunoglobulin is a common method for prophylaxis.

Purpose of the Study:

• To evaluate the efficacy of intramuscular immunoglobulin for measles postexposure prophylaxis.
• To determine the relationship between immunoglobulin measles antibody titer and clinical outcomes.

Main Methods:

• Children received intramuscular immunoglobulin (0.33 mL/kg) within 5 days of measles exposure.
• Immunoglobulin preparations with varying measles antibody titers were used.
• Clinical assessment for measles development was performed.

Main Results:

• 57% of children receiving immunoglobulin with a measles antibody titer of ≤16 IU/mL developed clinically evident measles.
• Lower immunoglobulin titers were associated with a higher incidence of measles.

Conclusions:

• Current immunoglobulin preparations with low measles antibody titers are insufficient for effective postexposure prophylaxis.
• Higher measles antibody titers in immunoglobulin are required for adequate protection.