2010). Other factors, including health status, stress, sex, age, co‐parasitic infection and environmental changes, might also be responsible for low Hb value in T. gondii‐infected sheep (Ramprabhu et al. 2010). Decreased erythrocyte count and low haemoglobin concentration are responsible for anaemia during Toxoplasma infection (Iewida & Cabanacan‐Salibay 2010). Here, GSTM1 is linked to anemia (phenotype).