title: [Correlation between Blatella germanica and Periplaneta americana in allergic patients].
abstract: BACKGROUND
  It has been identified shared allergens from whole body between Blatella germanica and Periplaneta americana. It has been reported high correlation between both cockroaches.
  
  
  OBJECTIVE
  To estimate correlation between skin test for two major species of intradomiciliary cockroaches.
  
  
  METHODS
  It was included patients with clinical diagnostic of allergy pathology whom attended to external consult of Allergy and Clinical Immunology Service of the Hospital Universitario de Puebla in a period of six months, prick skin tests with standardized antigens of Blatella germanica and Periplaneta americana were made.
  
  
  RESULTS
  One hundred twenty patients were enrolled in the study, 54.2% were women and 45.8% were men, with a mean age of 15.7 years old. The correlation coefficient between Germany cockroach and American cockroach to erythema was 0.49 and to papule was 0.40.
  
  
  CONCLUSIONS
  The outcomes showed a moderate correlation or a considerable relation between both cockroaches whether erythema or papule. Based on the results presented, we suggest to evaluate both antigens in order to improve diagnostic accuracy.
authors.affiliation: Servicio de alergia e inmunología clínica, Hospital Universitario de Puebla.
authors.forename: A
authors.initials: A
authors.lastname: Morales Hernández
authors.forename: A
authors.initials: A
authors.lastname: López García
authors.forename: A
authors.initials: A
authors.lastname: Galindo García
authors.forename: D
authors.initials: D
authors.lastname: Paz Martínez
authors.forename: S
authors.initials: S
authors.lastname: Papaqui Tapia
mesh_terms: D000293:Adolescent; D000818:Animals; D020048:Blattellidae; D003430:Cross-Sectional Studies; D017449:Dermatitis, Allergic Contact / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D010526:Periplaneta; D012882:Skin Tests