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Echániz-Aviles, Gabriela; Guerreiro, Soraia I; Silva-Costa, Catarina; Mendes, Catarina I; Carriço, João André; Carnalla-Barajas, María Noemí; Soto-Noguerón, Araceli; Velazquez-Meza, Maria Elena; Melo-Cristino, José; Luévanos-Velazquez, Antonio; Martínez-Medina, Lucía; Vázquez-Larios, María Del Rosario; Ramirez, Mário
Journal of clinical microbiology, 01/2019, Letnik: 57, Številka: 1Journal Article
expressing serotype 3 has a high virulence and a high case fatality ratio. Most studies of serotype 3 pneumococci have focused on a single lineage, the widespread sequence type 180 (ST180). To evaluate the serotype 3 lineages causing infections in Mexico, we characterized 196 isolates recovered from 1994 to 2017. The isolates were mostly susceptible to all antimicrobials tested. A single meningitis isolate was resistant to penicillin, and the resistance to erythromycin was 5.2%. The isolates represented the widely disseminated clonal complex 180 (CC180; = 140), the unusual CC4909 ( = 42), CC260 ( = 11), and a few singletons ( = 3). CC260 was less frequent among pneumococcal invasive disease isolates than CC180 and CC4909 ( = 0.015). There was a decrease of CC4909 ( < 0.001) following PCV13 introduction (2012 to 2017). The CC4909 isolates were represented mostly by ST1119 ( = 40), seemingly having a restricted geographic origin, with isolates in the PubMLST database having been recovered only in Mexico, the United States, and Germany. A genomic analysis of publicly available genomes showed that ST1119 isolates have less than 32% similarity with ST180 isolates, indicating that these lineages are more separated than revealed by traditional multilocus sequence typing. Considering the suggestions of a lower efficacy of the 13-valent pneumococcal conjugate vaccine against serotype 3, the different dynamics of the two major serotype 3 lineages in Mexico following the introduction of PCV13 should be closely monitored.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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