Map of Sistan va Baluchestan province in southeast Iran.

<p>Sampling from butchers and slaughterhouse workers was performed in the different counties of Sistan va Baluchestan province including: Zahak (Zh) and Zabol (Za) in the north, Zahedan (Zah), Iranshahr (Ir) and Khash (Kh) in the centre, and Saravan (Sav), Sarbaz (Sar), Nikshahr(N), Konarak (K) and Chabahar (Ch) in the south.</p