Differential Interaction between Invasive Thai Group B Streptococcus Sequence Type 283 and Caco-2 Cells
Issued Date
2022-10-01
Resource Type
eISSN
20762607
Scopus ID
2-s2.0-85140891249
Journal Title
Microorganisms
Volume
10
Issue
10
Rights Holder(s)
SCOPUS
Bibliographic Citation
Microorganisms Vol.10 No.10 (2022)
Suggested Citation
Boonsilp S., Nealiga M.J., Wangchuk K., Homkaew A., Wongsuk T., Thuncharoon H., Suksomchit P., Wasipraphai D., Chaturongakul S., Dubbs P. Differential Interaction between Invasive Thai Group B Streptococcus Sequence Type 283 and Caco-2 Cells. Microorganisms Vol.10 No.10 (2022). doi:10.3390/microorganisms10101917 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/84889
Title
Differential Interaction between Invasive Thai Group B Streptococcus Sequence Type 283 and Caco-2 Cells
Other Contributor(s)
Abstract
The emergence in Southeast Asia of invasive group B Streptococcus (GBS) infections in adults by sequence type (ST) 283 is suggested to be associated with fish consumption. Genotyping of 55 GBS clinical isolates revealed that 33/44 invasive isolates belonged to ST283/capsular polysaccharide type (CPS) III. This included 15/16 isolates recovered from younger adults aged 16–36 years. Seven ST283/CPSIII isolates from the blood, cerebrospinal fluid, or joint fluid were selected by the patient’s age at random to perform interaction studies with intestinal epithelial Caco-2 monolayers. The invasion efficiency profiles from this study classified these isolates into two groups; a higher invasion efficiency group 1 recovered from patients aged between 23 and 36 years, and a lower invasion efficiency group 2 recovered from the elderly and neonate. Intracellular survival tests revealed that only group 1 members could survive inside Caco-2 cells up to 32 h without replication. Additionally, all isolates tested were able to traverse across polarized Caco-2 monolayers. However, the timing of translocation varied among the isolates. These results indicated the potential of GBS invasion via the gastrointestinal tract and showed phenotypic variations in invasiveness, intracellular survival, and translocation efficiency between genetically closely related ST283 isolates infecting young adults and those infecting the elderly.