Table 1. New and Existing group B Streptococcus (GBS) clonal complex (CC) 283 sequences used for phylogenetic analysis.
This gives an overview of the origins and numbers of CC283. Further details are in Supporting Information.
| Host | Country | Site or reference | Collection Year | Sample type | GBS isolates screened for ST283 (No.) | GBS isolates with WGS data (No.) | CC283 isolates with WGS data (No.) |
|---|---|---|---|---|---|---|---|
| New sequences | |||||||
| Human | Singapore | Singapore General Hospital | 1998 | B | 5 | 5 | 5 |
| Human | Singapore | Tan Tock Seng Hospital & Changi General Hospital | 2001–2010 | B, CSF | 331 | 331 | 21 |
| Human | Thailand | Nakhon Phanom and Sa Kaeo provinces | 2007–2015 | B | 139 | 22 a | 22 |
| Human | Lao PDR | Mahosot Hospital, Vientiane | 2000–2017 | B, CSF | 38 | 38 | 30b |
| Human | Vietnam | Hospital for Tropical Diseases, Ho Chi Minh City | 2015–2017 | B | 13 | 13 | 4 |
| Human | Vietnam | Phu San Hospital, Hanoi | 2016–2017 | HVS | 38 | 0 a | 0 |
| Human | Cambodia | Angkor Hospital for Children, Siem Reap | 2012–2016 | S | 11 | 0 a | 0 |
| Human | Britain | Multiple hospitals | 2015 | B | ND | 1,017 | 1 |
| Tilapia | Malaysia | Kedah and Terengganu states | 2007–2008 | Br, E, K | 28 | 28 | 28 |
| Tilapia | Vietnam | An Giang and Can Tho | 2016 | Br | 34 | 34 | 34 |
| Existing sequences | |||||||
| Human | Singapore | [1] | 2011–2015 | B, CSF | ND | 145 | 40 |
| Human | Thailand | [1] | 2015 | B | ND | 7 | 6 |
| Human | Hong Kong | [24] | 1993–2012 | SS | ND | 11 | 11 |
| Human | Netherlands | GenBank | ND | ND | ND | 1 | 1 |
| Fish | Singapore | [1, 10] | 2015 | S, O, M | ND | 20 | 20 |
| Fish | Thailand | [9] | 2000–2010 | ND | ND | 1 | 1 |
| Fish | Vietnam | [9] | 2006 | ND | ND | 1 | 1 |
| Fish | Thailand | [25] | 2012–2014 | ND | ND | 1 | 1 |
| Frog | China | GenBank | 2014 | L | ND | 1 | 1 |
a = WGS was only performed on GBS positive by an ST283 specific PCR.
b = Included one technical replicate. Where sequences from the same site were identical (based on SNP calls), only one was used. Abbreviations: No. = number, B = blood, CSF = cerebro-spinal fluid, HVS = high vaginal swab, S = superficial swabs, ND = not determined, SS = sterile site, Br = brain, E = eye, K = kidney, O = organs, M = muscle, L = liver.