Genetic diversity of invasive strains of Haemophilus influenzae type b before and after introduction of the conjugate vaccine in Italy.
نویسندگان
چکیده
We determined the genotypes of 95 invasive Haemophilus influenzae type b (Hib) strains collected before and after introduction of widespread Hib vaccination in Italy. No substantial change in genetic diversity was highlighted by pulsed-field gel electrophoresis. However, an upward temporal trend in proportion of strains possessing multiple copies of the capsulation b locus was detected (P = .03).
منابع مشابه
Immunogenicity and Efficacy of Different Haemophilus influenzae type b Vaccines
Haemophilus influenzae, a major cause of meningitis in young children leading to death and other neurological sequelae. The disease leaves 15 to 35% of the survivors with permanent disabilities, such as, mental retardation or deafness. Despite the availability of new and more powerful antibiotics children with Hib meningitis still suffer from high mortality or morbidity. The emergence of multir...
متن کاملExtraction and Purification of Haemophilus influenzae Type b Lipooligosaccharide by Modified Phenol Method
Introduction : Haemophilus influenzae type b (Hib) is a Gram negative bacterium and one of the causative agents of acute bacterial meningitis, especially in infants and children less than 5 years old. Lipooligosaccharide (LOS), one of the virulence factors which plays an important role in pathogenesis of Hib, has multiple applications in diagnosis and conjugate vaccines. In this study, LOS ex...
متن کاملIncrease in genetic diversity of Haemophilus influenzae serotype b (Hib) strains after introduction of Hib vaccination in The Netherlands.
Recently, there has been an increase in The Netherlands in the number of cases of invasive disease caused by Haemophilus influenzae serotype b (Hib). To study a possible change in the Hib population that could explain the rise in incidence, a multiple-locus variable number tandem repeats analysis (MLVA) was developed to genotype H. influenzae isolates. The MLVA enabled the differentiation of H....
متن کاملPotentially Preventable Number of Cases and Deaths Associated with Pneumococcal Diseases and Haemophilus Influenzae in Iran during (2010-2013)
Background: Streptococcus pneumoniae and Haemophilus influenzae type b (Hib) is a leading cause of bacterial pneumonia, meningitis, and sepsis in children under 5-year of age. This study aims to estimate potentially preventable number of cases and deaths caused by Hib and pneumococcal in Iran.Materials and Methods:We used the burden of diseases model estimates of the World Health Organization (...
متن کاملHaemophilus influenzae type b vaccination: long-term protection.
OBJECTIVE To identify evidence of the impact of Haemophilus influenzae type b (Hib) conjugate vaccine on the epidemiology of invasive Hib disease. SOURCES OF DATA This review was based on a search of MEDLINE, LILACS, technical reports, national and international guidelines (publications from 1991 to 2005). The keywords Haemophilus influenzae type b, immunization, impact, and effectiveness, al...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Clinical infectious diseases : an official publication of the Infectious Diseases Society of America
دوره 43 3 شماره
صفحات -
تاریخ انتشار 2006