Evaluation of MDBK, BT, CEF and Vero cell lines sensitivity for replication of bovine parainfluenza virus type 3 (bPI3V) in comparison with RBK cell line

Bovine parainfluenza virus type 3 (bPI3V), as one of the most common viral agents causing bovine respiratory disease complex, belongs to the genus Respirovirus. The aim of this study was to compare the sensitivity of RBK, MDBK, BT, Vero cell lines and CEF primary cell for proliferation of bPI3V. For this purpose, first the best MOI for the selected bPI3V strain was determined on RBK cell line, and then used for sensitivity assay of each above cell lines. Tests repeated three times in the same condition and data were analyzed with independent samples t-test also as a completely randomized design with LSD method (SAS 9.4). According to the results of the t-test, there is no significant difference between the growth of the bPI3V on the RBK with MDBK and BT cell lines, whereas the RBK cell line showed a statistically significant difference with respect to Vero and CEF cell lines separately (P-value 0.01). No significant differences were seen between the RBK, MDBK, and BT cell lines as well as between Vero and CEF cells based on LSD test results, but RBK, MDBK and BT in comparison with Vero and CEF are significantly different with 99% confidence. It can be concluded that the RBK cell line, due to its higher sensitivity to bPI3V, as well as easier and faster cell culturing, is the superior to the other cell lines in this study.