N h i ^ u t6c ngtfcfi cr Dong Nam A t i n rang t r o n g c6ng dbng m i n h cd mot loai ngifdi quy chuyen giet hai dan l a n h bang each an mat hbn va h i i t ma't mau ngiTdi do. Viec xac d i n h diToc ngifcfi quy la viec kho, doi hoi nhiJng thuf t h a c h dac biet. Ngifdi X t i e n g cr dong bac Cam-pu-chia va of Tay Nguyen (Viet Nam) ra't sa nhiJng ngtrdi b i ma quy nhap vao va goi ngifcfi do la e-ak nghla ra ngUcfi chuyen mang dau bm, chet choc cho
ngvfcfi khac va thiic/ng an gan ngifcfi. Mu6'n bi§'t ai la §-ak, ngifcri X t 6 n g d u n g phifcfng phap d6 chi n d n g chay vao tay. Ta't ca moi ngUdi, trijf tre con, dfeu phai nguTa long ban tay, sao cho ban tay h d i doc, de dd' chi long. Tay ai de chi t r o i t u d t xud'ng da't, ngtfcfi dd k h d n g phai la §-ak; neu chi dong lai va lam chay da tay ngtfdi nao, ngifcfi dd d i i n g la e-ak.
Cac dan toe i t ngifdi cr Tay Nguyen goi loai ngifcfi- quy gay benh tat, chet choc la ma lai. Ho ra't scf ma lai va cung cd nhiJng each thuf de t i m ra ma l a i . Ngoai each dd nifdc chi ndng chay vao long ban tay, ho con thifc h a n h n h i f n g each thuT khac d§' xac d i n h ma lai nhif:
- Cving th'an, rbi dem ngifcfi b i n g h i dim xud'ng nifde. N6'u la ma lai, ngifcfi b i n g h i se nhoi 16n ngay'.
- C l i n g t h a n , r b i ISiy gifcfm chat mot cai nbi da't set m d i . N e u ngifcfi bj n g h i k h d n g phai la ma l a i - t h i cai nbi se bufa ddi, t r a i l a i , neu cai ribi vd tan t h i ngudi dd la ma l a i .
- La'y nhifa cay eiing t h i n r b i cho vao nbi dun s6i
len. Ngifdi bi n g h i phai tho tay vao nbi, di ban tay
g i n sat mat nhUa cay. Neu la ma lai, tay ngifcfi dd se p h b n g len va ngifcfi dd phai r i i t tay ngay k h o i n b i .
M o t ngifcfi dan ong, k h i difcfc xac d i n h la ngifcfi quy, se b i giet ngay, con vcf con dng ta t h i b i ban lam t o i t d cho lang khac.
L e p h a i t h u d c v§ nguTori l ^ n l a u h e m
NgiTcfi K h a - s i ( M y - a n - m a ) g i a i quyg"! cac bS't d b n g theo nhOfng each thiJc qvia d6c dao.
T n r d c d 6 n g dao nhOfng ngifcfi c h i i n g ki§n, t r o n g do
CO ca v i t h t i l i n h , h a i ngifcfi t r a n h k i e n c^tn cky t h i f c m g
x u 6 n g dirdi day nifdc, r b i c u n g I a n t r o n g nifdc, tay c^m thvfcmg va ai c u n g c6' g^ng hg't si?c d§' dOfng n g o i l e n t r i f d c d6'i t h u . NgiTdi ngoi Ign t r i r d c se b j coi la t h u a k i 6 n . R6 r a n g la n h i J n g n g i r d i " n g ^ n hcfi" p h a i c h j u t h u a k i g n , d u r a n g t r & n t h U c tg', le p h a i t h u 6 c ve a n h
ta.
T r o n g cuoc p h a n xuT nay, m 6 i bfin dfeu c6 n h v l n g n g i r d i u n g h 6 . K h 6 n g t h i la 6 de tra'n ap t i n h t h ^ n d6'i phi:rcfng, n a n g cao t i n h th'&n n g u d i m i n h u n g ho v i ca h a i deu difdi nUdc, cac "cd d 6 n g v i e n " t h u d n g d u n g cfiy thifcfng t i Ign n g u d i m i n h u n g ho, " g i i i p " n g i f d i do