TABLE 1. Measles virus genotypes, distinct N450* sequences, diversity index,† and rubella virus genotypes reported globally — Measles Nucleotide Surveillance (MeaNS) database and Rubella Nucleotide Surveillance database, 2016–2018.
| Genotype | 2016 |
2017 |
2018 |
||||||
|---|---|---|---|---|---|---|---|---|---|
| No. of records (%) | No. of DSIds | Diversity index | No. of records (%) | No. of DSIds | Diversity index | No. of records (%) | No. of DSIds | Diversity index | |
|
Measles virus
| |||||||||
| B3 |
705 (14) |
96 |
0.136 |
2,665 (45) |
170 |
0.064 |
2,923 (44) |
219 |
0.075 |
| D4 |
51 (1) |
7 |
0.137 |
15 (<1) |
6 |
0.400 |
19 (<1) |
2 |
0.105 |
| D5 |
1 (<1) |
1 |
1.000 |
N/D |
N/D |
N/D |
N/D |
N/D |
N/D |
| D8 |
1,541 (31) |
166 |
0.108 |
2,561 (44) |
208 |
0.081 |
3,396 (51) |
281 |
0.083 |
| D9 |
96 (2) |
11 |
0.115 |
46 (<1) |
5 |
0.109 |
N/D |
N/D |
N/D |
| H1 |
2,625 (52) |
204 |
0.078 |
544 (9) |
70 |
0.129 |
333 (5) |
40 |
0.120 |
|
Total
|
5,019 (100)
|
485
|
N/A
|
5,831 (100)
|
459
|
N/A
|
6,671 (100)
|
542
|
N/A
|
|
Rubella virus
| |||||||||
| 1E |
10 (4) |
N/A |
N/A |
13 (7) |
N/A |
N/A |
933 (88) |
N/A |
N/A |
| 1G |
6 (3) |
N/A |
N/A |
2 (1) |
N/A |
N/A |
N/D |
N/A |
N/A |
| 1H |
1 (<1) |
N/A |
N/A |
1 (<1) |
N/A |
N/A |
N/D |
N/A |
N/A |
| 1J |
1 (<1) |
N/A |
N/A |
N/D |
N/A |
N/A |
N/D |
N/A |
N/A |
| 2B |
221 (92) |
N/A |
N/A |
172 (91) |
N/A |
N/A |
130 (12) |
N/A |
N/A |
| Total | 239 (100) | N/A | N/A | 188 (100) | N/A | N/A | 1,063 (100) | N/A | N/A |
Abbreviations: DSIds = distinct sequence identifiers; N/A = not applicable; N/D = genotype not detected.
* N450: Sequences for the 450-nucleotide carboxy-terminal of the nucleocapsid gene in the measles virus genome. Data from the MeaNS database is available at http://www.who-measles.org/Public/Web_Front/main.php.
† The diversity index for each measles virus genotype reported to MeaNs is defined as the number of distinct sequence identifiers divided by the total number of records.