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Relationship among epidemiological parameters of six childhood infections in a non-immunized Brazilian community.
Amaku, Marcos; Azevedo, Raymundo Soares; Castro, Ruy Morgado de; Massad, Eduardo; Coutinho, Francisco Antonio Bezerra.
Affiliation
  • Amaku M; Departamento de Patologia, Faculdade de Medicina Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brasil, 05508-270. amaku@usp.br
Mem Inst Oswaldo Cruz ; 104(6): 897-900, 2009 Sep.
Article in En | MEDLINE | ID: mdl-19876563
Epidemiological parameters, such as age-dependent force of infection and average age at infection () were estimated for rubella, varicella, rotavirus A, respiratory syncytial virus, hepatitis A and parvovirus B19 infections for a non-immunized Brazilian community, using the same sera samples. The for the aforementioned diseases were 8.45 years (yr) [95% CI: (7.23, 9.48) yr], 3.90 yr [95% CI: (3.51, 4.28) yr], 1.03 yr [95% CI: (0.96, 1.09) yr], 1.58 yr [95% CI: (1.39, 1.79) yr], 7.17 yr [95% CI: (6.48, 7.80) yr] and 7.43 yr [95% CI: (5.68, 9.59) yr], respectively. The differences between average ages could be explained by factors such as differences in the effectiveness of the protection conferred to newborns by maternally derived antibodies, competition between virus species and age-dependent host susceptibility. Our seroprevalence data may illustrate a case of the above-mentioned mechanisms working together within the same population.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Virus Diseases Type of study: Health_economic_evaluation / Prevalence_studies / Risk_factors_studies Limits: Adolescent / Adult / Child / Child, preschool / Humans / Infant / Newborn Country/Region as subject: America do sul / Brasil Language: En Journal: Mem Inst Oswaldo Cruz Year: 2009 Document type: Article Country of publication: Brazil

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Virus Diseases Type of study: Health_economic_evaluation / Prevalence_studies / Risk_factors_studies Limits: Adolescent / Adult / Child / Child, preschool / Humans / Infant / Newborn Country/Region as subject: America do sul / Brasil Language: En Journal: Mem Inst Oswaldo Cruz Year: 2009 Document type: Article Country of publication: Brazil