“…It should be noted that in this research, mesenteric lymph nodes of the sheep were examined because it is the first site that the parasite chooses to enter (Shekarforush & Arzani-Shahni, 2002). However, based on other conducted studies in Iran, the reported infection rates of sheep mesenteric lymph nodes in various parts of Iran were as followed: Isfahan, 11% (Kheirabadi et al, 2015); Urmia, 65.7% (Yakhchali et al, 2009); Shiraz, 11.5% (Shekarforoush et al, 2004); Tabriz, 52.5% (Tavassoli et al, 2007) Kermanshah, 19.7% (Hashemnia et al, 2016). In this research, the infection rate of sheep in their mesenteric lymph nodes was 8.6%.…”