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Table 1 Study population demographics, and potential risk factors in association with EEHV antibody seroprevalence of elephants in Thailand (nā€‰=ā€‰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

<ā€‰11ā€‰years

73 (0.45/0.55)

11ā€“50ā€‰years

797 (0.30/0.70)

>ā€‰50ā€‰years

124 (0.29/0.71)

Management type (province1)

Extensive:

(CM, LP, CR, SKT, Tak, CP)

505 (0.34/0.66)

(nā€‰=ā€‰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)

(nā€‰=ā€‰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 (<ā€‰10 elephants)

19 (0.20/0.80)

Medium cluster (10ā€“50 elephants)

372 (0.30/0.70)

Large cluster (>ā€‰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)

Aprilā€“October

824 (0.30/0.70)

Novemberā€“March

170 (0.38/0.62)

  1. 1CMā€‰=ā€‰Chiang Mai, LPā€‰=ā€‰Lampang, CRā€‰=ā€‰Chiangrai, SKTā€‰=ā€‰Sukhothai, Takā€‰=ā€‰Tak, CP=Chaiyapum, AYā€‰=ā€‰Ayuttaya, NKPTā€‰=ā€‰Nakhonpathom, RBRā€‰=ā€‰Ratchburi, PJā€‰=ā€‰Prajuobkirikhan, CBRā€‰=ā€‰Chonburi, Tratā€‰=ā€‰Trat, BRRā€‰=ā€‰Burirum, NKSMā€‰=ā€‰Nakhoratchsima, SRā€‰=ā€‰Surinth, SRTNā€‰=ā€‰Suratthani, PNGā€‰=ā€‰Phang-nga, Smuiā€‰=ā€‰Smui, SKLā€‰=ā€‰Songkla and CPoā€‰=ā€‰Chumporn
  2. 2Defined as number of camps (i.e., those within a radius of 2ā€‰km) that shared resources like a river, road or land area, or working area during the day