Table 1.

Capsular antigens of Haemophilus influenzae, Neisseria meningitidis, Streptococcus agalactiae, and S. pneumoniae.

Organism	Capsular Serotype/Serogroup Antigens	Reference
H. influenzae	Serotypes a, b, c, d, e, and f,	Pittman, 1931 [26]
N. meningitidis	Serogroups A, B, C, E, H, I, K, L, W, X, Y, and Z	Harrison et al., 2013 [27]
S. agalactiae	Serotypes Ia, Ib, II, III, IV, V, VI, VII, VIII, and IX	Song et al., 2018 [5]; Lin et al., 2018 [13]
S. pneumonia *	100 serotypes have been identified and only a few are listed here; Serotypes 1, 2, 3, 4, 5, 6A, 6B, 6C, …… 11E, 20B, … 35D, 7D, 10D (complete list can be found in the references provided)	Geno et al., 2015 [28]; Ganaie et al., 2020 [29]

* 100 different serotypes identified, please see references for full list.