Molecular epidemiology of Streptococcus pneumoniae serogroup 6 isolates from Fijian children, including newly identified serotypes 6C and 6D.
نویسندگان
چکیده
Multilocus sequence typing (MLST) was applied to all unique serotype 6C and 6D isolates and a random selection of serotype 6B and 6A isolates from nasopharyngeal swabs from Fijian children enrolled in a recent vaccine trial. The results suggest that Fijian serotype 6D has arisen independently from both serotypes 6A/C and 6B.
منابع مشابه
First report of putative Streptococcus pneumoniae serotype 6D among nasopharyngeal isolates from Fijian children.
BACKGROUND A putative Streptococcus pneumoniae serotype, 6D, resulting from the introduction of wciN(beta) into serotype 6B has been proposed. METHODS We studied 98 unique serogroup 6 isolates from Fijian children, two-thirds of whom had received at least 1 dose of 7-valent pneumococcal conjugate vaccine, and 51 invasive isolates from Australian children. We used a polymerase chain reaction (...
متن کاملFirst report of Streptococcus pneumoniae serotype 6D in South America.
Streptococcus pneumoniae includes the two serotypes 6A and 6B as well as two recently discovered serotypes, 6C and 6D, in which the wciN gene is replaced by wciN within the cps locus. Serotype 6D occurrence in Asia (2, 4), the Fiji islands (5) and Europe (7, 9) has recently been reported. To our knowledge, we describe here the first description of serotype 6D isolates identified within the Amer...
متن کاملFrequency and molecular characterization of invasive isolates of Streptococcus pneumoniae serotypes 6C and 6D in Colombia.
INTRODUCTION Serogroup 6 of Streptococcus pneumoniae initially consisted of the 6A and 6B serotypes, but in recent years, the 6C and 6D serotypes were reported. The aim of this study was to determine the frequency and molecular characterization of invasive S. pneumoniae isolates serotypes 6C and 6D in Colombia, from 1994 to 2013. METHODOLOGY All the isolates recovered during the surveillance ...
متن کاملLong-Term Epidemiology of Streptococcus pneumoniae Serogroup 6 in a Region of Southern Europe with Special Reference to Serotype 6E
Streptococcus pneumoniae serotype 6E has recently been described, but its long-term epidemiology is not well known. From 1981-2013, 704 serogroup 6 clinical isolates were obtained in Gipuzkoa, Basque Country, Spain. All invasive and one in four non-invasive isolates were included. Overall, 75, 97, 51 and 45 serotypes 6A, 6B, 6C and 6E isolates, respectively, were detected. No serotype 6D isolat...
متن کاملComparison of capsular genes of Streptococcus pneumoniae serotype 6A, 6B, 6C, and 6D isolates.
Recently, Streptococcus pneumoniae serotypes 6C and 6D have been identified. It is thought that they emerged by the replacement of wciN(β) in the capsular loci of serotypes 6A and 6B, respectively. However, their evolution has not been unveiled yet. To investigate the evolution of four serotypes of S. pneumoniae serogroup 6, four genes of the capsular polysaccharide synthesis (cps) locus, wchA,...
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ورودعنوان ژورنال:
- Journal of clinical microbiology
دوره 48 11 شماره
صفحات -
تاریخ انتشار 2010