This volume, therefore, comprises the works presented by reputed workers in their respective fields of specialization under the wide subject of parasitology during the 26th All India Congress of Zoology and International Conference on 'Innovations in Animal Sciences for Food Security, Health Security and Livelihood' held from 29th -31st October, 2015 at Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow in collaboration with the Zoological Society of India. The editors take this opportunity to express sincere and deep gratitude to the authors for their contributions which will go a long way in enriching the information in the field, a primary aim for any reference book.