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Table 1 Study population demographics, and potential risk factors in association with EEHV antibody seroprevalence of elephants in Thailand (n = 994)

From: Evidence of high EEHV antibody seroprevalence and spatial variation among captive Asian elephants (Elephas maximus) in Thailand

Risk factors Category Number (proportion male/female)
Sex Female 678 (0.68)
Male 316 (0.32)
Age category < 11 years 73 (0.45/0.55)
11–50 years 797 (0.30/0.70)
> 50 years 124 (0.29/0.71)
Management type (province1) Extensive:
(CM, LP, CR, SKT, Tak, CP)
505 (0.34/0.66)
(n = 286, 125, 8, 16, 68 and 2 respectively)
Intensive:
(AY, NKPT, RBR, PJ, CBR, Trat, BRR, NKSM, SR, SRTN, PNG, Smui, SKL, CPo)
489 (0.29/0.71)
(n = 76, 27, 36, 1, 166, 41, 1, 3, 56, 15, 63, 2, 1 and 1 respectively)
Region Central 76 (0.25/0.75)
East 207 (0.16/0.84)
North 435 (0.36/0.64)
Northeast 62 (0.50/0.50)
South 82 (0.46/0.54)
West 132 (0.25/0.75)
Camp cluster2 Small cluster (< 10 elephants) 19 (0.20/0.80)
Medium cluster (10–50 elephants) 372 (0.30/0.70)
Large cluster (> 50 elephants) 603 (0.32/0.68)
Border contact with Myanmar Yes 77 (0.19/0.81)
No 917 (0.32/0.68)
Sampling period (months) April–October 824 (0.30/0.70)
November–March 170 (0.38/0.62)
  1. 1CM = Chiang Mai, LP = Lampang, CR = Chiangrai, SKT = Sukhothai, Tak = Tak, CP=Chaiyapum, AY = Ayuttaya, NKPT = Nakhonpathom, RBR = Ratchburi, PJ = Prajuobkirikhan, CBR = Chonburi, Trat = Trat, BRR = Burirum, NKSM = Nakhoratchsima, SR = Surinth, SRTN = Suratthani, PNG = Phang-nga, Smui = Smui, SKL = Songkla and CPo = Chumporn
  2. 2Defined as number of camps (i.e., those within a radius of 2 km) that shared resources like a river, road or land area, or working area during the day