New focus of Kyasanur Forest disease virus activity in a tribal area in Kerala, India, 2014

Table 1 Cluster wise summary of KFD cases and contacts investigated during the study

Clusters	Case/Contact status	No. investigated	No. reported with fever	No. of sera	No. of sera positive for KFD (IgM ELISA/IgG ELISA/RNA by RT-PCR)
Cluster 1
	Index case	1	1	2	2 (IgM by ELISA) and
	Index case	1	1	2	1 (IgG ELISA)
	Family contacts	8	0	7	1 (IgM by ELISA)*
Cluster 2
	Primary cases	2	2	0	Not applicable@
	Secondary cases	4	4	4	1 (RNA by RT-PCR)#
	Tribal contacts	17	5	17	1 (IgM by ELISA)$

*Contact did not report a history of fever.
$Contact reported a history of fever.
@ Primary cases could not be sampled as they died without medical consultation before the field investigation took place. Verbal autopsy indicated that these were suspect cases based on clinical/epidemiological history.
#The secondary case was a family member of either of the two suspected primary cases who died.

ISSN: 2049-9957