Prevalence of Dirofilaria immitis infection in dogs in Henan province, central China Shuai Wang, Nian Zhang, Zhenchao Zhang, Dong Wang, Zhijun Yao, Haizhu Zhang, Jingbo Ma, Bin Zheng, Hongbin Ren and Shiguo Liu Parasite, 23 (2016) 43 Published online: 14 October 2016 DOI: 10.1051/parasite/2016054