Table 1.
State | Name of districts | Total no. of samples screened | Positive in Competitive ELISA | Apparent prevalence (%) | True prevalence (%) | Confidence interval (95 %) |
---|---|---|---|---|---|---|
Serum samples randomly collected | ||||||
Arunachal Pradesh | West Kameng, Lohit, West Siang and Papum Pare | 32 | 5 | 15.62 | 15.45 | 6.87–31.76 |
Assam | Kamrup, Mongoldoi, Bongaigaon, Nalbari, Udalgiri, Darrang, Gorchuk,Guwahati, Barpeta, and Dhubri | 105 | 19 | 18.09 | 18.17 | 11.91–26.55 |
Manipur | Ukhrul,Chandel, Thoubal, Imphal East, Senapati, Bishnupur and Chaurachandpur | 92 | 0 | – | – | – |
Meghalaya | Jaintia Hills, East Khasi Hills and Ribhoi | 34 | 2 | 5.88 | 4.72 | 1.63–19.09 |
Mizoram | 12 | 0 | – | – | – | |
Nagaland | Kohima and Dimapur | 25 | 0 | – | – | – |
Tripura | West Tripura and Bishalgarh | 18 | 11 | 61.11 | 65.54 | 38.62–79.69 |
Sub-total | – | 318 | 37 | 11.63 | 11.05 | 8.56–15.63 |
χ2 Value | 70.30a | |||||
Mean ± SE | 36.71 ± 0.016 | 34.51 ± 0.007 | ||||
Suspected serum samples collected during outbreak | ||||||
Meghalaya | Ribhoi | 4 | 0 | – | – | – |
Assam | Kamrup, Mongoldoi, Nalbari, Gorchuk, Guwahati, Darrang | 69 | 33 | 47.82 | 50.90 | 36.47–59.42 |
Sub-total | 73 | 33 | 45.20 | 48.02 | 34.32–56.58 | |
Total | 391 | 70 | 17.90 | 17.95 | 14.40–22.00 | |
Mean ± SE | 32.99 ± 0.05 | 35.05 ± 0.05 | ||||
Suspected clinical samples collected during outbreak | ||||||
Samples screened | Positive in S-ELISA | Positive in RT_PCR | – | – | ||
Meghalaya | Ribhoi | Pooled tissues-6 | 0 | 2 | – | – |
Assam | Kamrup, Mongoldoi, Nalbari,Jorhat, Guwahati | Pooled tissues-25 | 2 | 7 | – | – |
Blood-6 | 0 | 2 |
s-ELISA-sandwich ELISA, RT-PCR- reverse transcription–polymerase chain reaction
SE Standard Error
aRepresents significance (p < 0.01) level