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Zorluk: OrtaImmunizations and Vaccine-Preventable Diseases

Determine the most appropriate post-exposure prophylaxis for each of the following patients presenting with a recent infectious exposure.

  • A 30-year-old healthcare worker with no prior immunizations who sustained a needlestick injury from a Hepatitis B surface antigen-positive patient.Administer hepatitis B immune globulin (HBIG) and the hepatitis B vaccine
  • A 45-year-old immigrant with an unknown immunization history who sustained a deep, dirt-contaminated puncture wound.Administer the Tdap vaccine alongside tetanus immune globulin (TIG)
  • A healthy 10-month-old infant brought to the clinic 48 hours after prolonged close contact with a child diagnosed with measles.Administer the live-attenuated MMR vaccine
  • A susceptible 25-year-old woman at 28 weeks gestation who was exposed to varicella two days ago.Administer varicella-zoster immune globulin (VZIG)

Cevap

The healthcare worker receives HBIG and the hepatitis B vaccine. The patient with the dirty wound receives the Tdap vaccine and TIG. The 10-month-old infant receives the MMR vaccine. The pregnant woman receives VZIG.
Each matching pair accurately identifies the post-exposure prophylaxis protocol established by guidelines: HBIG plus vaccine for unvaccinated high-risk hepatitis B exposures, TIG plus vaccine for dirty wounds in unimmunized individuals, the MMR vaccine for 6 to 11 month-old infants exposed to measles within a 72-hour window, and VZIG for susceptible pregnant women exposed to varicella.

Adım Adım Çözüm

1
Evaluate the hepatitis B exposure scenario.
The healthcare worker is completely unvaccinated and the source is known to be HBsAg-positive.
This represents a high-risk percutaneous exposure requiring immediate passive and active immunity.
2
Evaluate the tetanus exposure scenario.
The patient has an unknown immunization history and presents with a dirty puncture wound.
According to established wound management guidelines, dirty wounds in unimmunized or under-immunized patients require both tetanus toxoid (active immunity) and TIG (passive immunity).
3
Evaluate the measles exposure scenario.
The patient is a healthy 10-month-old infant exposed 48 hours ago.
The MMR vaccine is indicated for post-exposure prophylaxis in healthy infants aged 6 to 11 months if administered within 72 hours. Immune globulin is typically reserved for infants under 6 months of age.
4
Evaluate the varicella exposure scenario.
The patient is a non-immune pregnant woman.
Live-attenuated vaccines, such as the varicella vaccine, are strictly contraindicated during pregnancy. VZIG provides safe and effective passive immunity.

Anahtar Kavram

Appropriate post-exposure prophylaxis for vaccine-preventable diseases requires careful assessment of the patient's underlying immune status, the exact nature of the exposure, and absolute contraindications to active vaccines (such as age or pregnancy).
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