Muhammad Ilyas Riaz, Masood Rabbani, Sohail Raza, Ali Raza Awan, Aleena Kokab and Iqra Nazir, 2023. Construction and Characterization of purD Gene Deleted Brucella abortus. Pakistan J. Zool., 55: 2443-2449. DOI: https://dx.doi.org/10.17582/journal.pjz/20220406050441