Effect of Parasitic Infections on Hematological Profile, Reproductive and Productive Performance in Equines

Equines play a crucial role in global food security, economic development, and recreation, particularly in regions such as Central Asia, parts of Africa, and South America. However, parasitic infections significantly impact their health, productivity, and reproductive performance, leading to economic losses and reduced animal welfare. This review synthesizes the effects of parasitic infections, including protozoan, helminthic, and ectoparasitic species, on equines. These infections cause hematological alterations like anemia, leukocytosis, leukopenia, and thrombocytopenia, compromising overall health and resilience. Protozoan parasites, such as <i>Trypanosoma</i> spp., <i>Theileria equi</i>, and <i>Babesia caballi</i>, directly affect semen quality and fertility by causing testicular lesions, orchitis, and hormonal disruptions. Helminths like <i>Cyathostomins</i> and <i>Strongyles</i> reduce nutrient absorption, impairing productivity, while some protozoan species can cause abortion through transplacental transmission. Zoonotic parasites, including <i>Sarcocystis</i> spp. and <i>Toxoplasma gondii</i>, pose a human health risk through contaminated meat and milk consumption. Despite the effectiveness of conventional anthelmintics, emerging biological control methods like Duddingtonia flagrans (BioWorma^® and Bioverm^®) show promise. However, the development of standardized herbal anthelmintics and vaccines is hindered by limited efficacy validation, complex parasite biology, and inadequate funding. The need for better diagnostic tools and sustainable treatments remains critical for the long-term sustainability of the equine industry.