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Seroconversion after measles vaccination at nine and fifteen months of age.
Pediatr Infect Dis J. 2003 Aug; 22(8):691-5.PI

Abstract

BACKGROUND

Despite high vaccination coverage, single dose measles immunization programs have been unsuccessful in eliminating the disease. Because seroconversion rates are lower in infants vaccinated before 12 months of age, a second dose of measles vaccine is recommended at 15 months. The aim of this study was to determine the seroconversion rates in children after the first and second doses of measles vaccinations at 9 and 15 months of age.

METHODS

Study population comprised 116 infants attending the Well Baby Clinic of Istanbul University, Faculty of Medicine. Serum specimens were obtained from children before and 1 month after the first measles (Rouvax, Schwarz strain 1000 TCID(50)) vaccine given at 9 months. A second dose was given to 72 children at 15 months of age as measles-mumps-rubella (Trimovax, Schwarz measles strain, 1000 TCID(50); Urabe Am 9 mumps strain, 5000 TCID(50); Wister RA 27/3 rubella strain, 1000 TCID(50)). Third blood samples were collected 20 months after the second vaccine.

RESULTS

Passive antibody positivity rate was 5.2% at the age of 9 months. Seroconversion rate was 77.6% after the first dose and 81.9% after the second dose of measles vaccine. Of 15 children who were seronegative, 13 (86.7%) became seropositive after the immunization at 15 months. Eleven children (19.2%) seroconverted from positive to negative after the second vaccine.

CONCLUSION

The two dose schedule seems to increase the seropositivity rate. Our findings also indicate that increasing vaccination coverage and revaccination at 6 years of age are important even with the early two dose schedule.

Authors+Show Affiliations

Department of Microbiology and Clinical Microbiology, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12913768

Citation

Işik, Nilgün, et al. "Seroconversion After Measles Vaccination at Nine and Fifteen Months of Age." The Pediatric Infectious Disease Journal, vol. 22, no. 8, 2003, pp. 691-5.
Işik N, Uzel N, Gökçay G, et al. Seroconversion after measles vaccination at nine and fifteen months of age. Pediatr Infect Dis J. 2003;22(8):691-5.
Işik, N., Uzel, N., Gökçay, G., Kiliç, A., Yilmaz, G., Sadikoğlu, B., & Diri, S. (2003). Seroconversion after measles vaccination at nine and fifteen months of age. The Pediatric Infectious Disease Journal, 22(8), 691-5.
Işik N, et al. Seroconversion After Measles Vaccination at Nine and Fifteen Months of Age. Pediatr Infect Dis J. 2003;22(8):691-5. PubMed PMID: 12913768.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Seroconversion after measles vaccination at nine and fifteen months of age. AU - Işik,Nilgün, AU - Uzel,Nedret, AU - Gökçay,Gülbin, AU - Kiliç,Ayşe, AU - Yilmaz,Gülden, AU - Sadikoğlu,Banu, AU - Diri,Sanem, PY - 2003/8/13/pubmed PY - 2003/9/27/medline PY - 2003/8/13/entrez SP - 691 EP - 5 JF - The Pediatric infectious disease journal JO - Pediatr Infect Dis J VL - 22 IS - 8 N2 - BACKGROUND: Despite high vaccination coverage, single dose measles immunization programs have been unsuccessful in eliminating the disease. Because seroconversion rates are lower in infants vaccinated before 12 months of age, a second dose of measles vaccine is recommended at 15 months. The aim of this study was to determine the seroconversion rates in children after the first and second doses of measles vaccinations at 9 and 15 months of age. METHODS: Study population comprised 116 infants attending the Well Baby Clinic of Istanbul University, Faculty of Medicine. Serum specimens were obtained from children before and 1 month after the first measles (Rouvax, Schwarz strain 1000 TCID(50)) vaccine given at 9 months. A second dose was given to 72 children at 15 months of age as measles-mumps-rubella (Trimovax, Schwarz measles strain, 1000 TCID(50); Urabe Am 9 mumps strain, 5000 TCID(50); Wister RA 27/3 rubella strain, 1000 TCID(50)). Third blood samples were collected 20 months after the second vaccine. RESULTS: Passive antibody positivity rate was 5.2% at the age of 9 months. Seroconversion rate was 77.6% after the first dose and 81.9% after the second dose of measles vaccine. Of 15 children who were seronegative, 13 (86.7%) became seropositive after the immunization at 15 months. Eleven children (19.2%) seroconverted from positive to negative after the second vaccine. CONCLUSION: The two dose schedule seems to increase the seropositivity rate. Our findings also indicate that increasing vaccination coverage and revaccination at 6 years of age are important even with the early two dose schedule. SN - 0891-3668 UR - https://www.unboundmedicine.com/medline/citation/12913768/Seroconversion_after_measles_vaccination_at_nine_and_fifteen_months_of_age_ L2 - https://doi.org/10.1097/01.inf.0000078158.23337.ed DB - PRIME DP - Unbound Medicine ER -