Fig. 2

Graphical representation of C1, a giant component with 63 (3.22%) patients and 63 (8.01) transmission contacts. Giant component represented in the sociogram consists of 63(9.35% of 673) cases (circular nodes) and 63 (12.96% of 486) epidemiological contacts (edges denoted by arrowed lines). The size of a node is proportional to its out-degree centrality. The arrows denote the direction of infection from source to target cases. Patient P52 has the largest out-degree (36) and acted as a source case for 36 target cases. The next influential node was P88, who acted as the source case for nine target cases. Other influential source cases were P104, P 78, and P159 who had out-degree of 2. Nodes P111, P183, P77, P81, P 85, P109, P319, P346, P382, and P383 were the source case for one target case each. The colour of the node indicates the category of betweenness centrality measure. Lavender colour denotes, zero betweenness, leaf green nodes denote betweenness of one, blue denotes betweenness of 2, saffron denotes betweenness of 1.5, grey denotes betweenness of 2.5, rose denotes betweenness of 3, dark green denotes betweenness of 9 for P88 which acted as a bridge of transmission between source case P52 and target cases P112, P210, P216, P212, P214, P209, P212, P111 and P202. The path length between P52 and P202 is 4, which was the maximum and thus the diameter of the network. P52 had in-Degree of zero, P200 had in-degree of 2, and all other patients had one in-degree