Retrospective investigation of Newcastle disease reported in Türkiye between 2017-2019

Abstract
This study was aimed to understand the temporal, spatial epidemiology and calculate the case fatality rates of Newcastle Disease (ND) between 2017-2019 in Turkey using The World Animal Health Information System (WAHIS) database of The World Organization for Animal Health (OIE). Also was aimed to produce the maps by using Geographical Information Systems (GIS). 220 outbreaks of ND were registered in 47 provinces of Turkey between 2017-2019 and were 88,372 poultry animals contracted the disease. The highest number of ND outbreaks, cases, deaths and killed/disposed animals was reported in The Black Sea Region between 2017-2019. The outbreak was mostly seen in the spring months. The peak month of Newcastle Disease was in May, the lowest month was October. Creating maps based on the outbreaks of ND, commonly seen in Turkey will have an important role in improving the measures to be taken against the disease.