title: Nonoutbreak surveillance of group A streptococci causing invasive disease in Portugal identified internationally disseminated clones among members of a genetically heterogeneous population.
abstract: The typing of 160 invasive Streptococcus pyogenes isolates confirmed the importance of pulsed-field gel electrophoresis and multilocus sequence typing for defining clones. The results identified an extremely diverse population and highlighted the importance of both internationally disseminated and local clones not previously associated with invasive disease.
authors: Instituto de Microbiologia, Faculdade Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz, PT 1649-028 Lisboa, Portugal.
authors: A
authors: A
authors: Friães
authors: M
authors: M
authors: Ramirez
authors: J
authors: J
authors: Melo-Cristino
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015373:Bacterial Typing Techniques; D016521:Electrophoresis, Gel, Pulsed-Field; D014644:Genetic Variation; D014943:Global Health; D006801:Humans; D008875:Middle Aged; D011159:Population Surveillance; D011174:Portugal / Q000453:epidemiology; D017422:Sequence Analysis, DNA; D012703:Serotyping; D013290:Streptococcal Infections / Q000453:epidemiology* / Q000382:microbiology; D013297:Streptococcus pyogenes / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification