Isolation and Biological Characterization of Newcastle Disease Virus (NDV) Field Isolate Pigeon (Columba livia) from Live Bird Market, East Java in 2019

Biological Characterization Bird Market Columba livia Lentogenic Strain Newcastle Disease

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Background: Avian Paramyxovirus (APMV) type-1 is the leading cause of Newcastle Disease (ND) and taxonomically belongs to the family Paramyxoviridae, genus Avulavirus. Due to its high transmission rate, Newcastle Disease (ND) is included in the A list by the OIE. Purpose: To determine the biological characterize the Newcastle Disease Virus (NDV) field isolate of pigeons (Columba livia) using Mean Death Time (MDT), Intracerebral Pathogenicity Index (ICPI), and Intravenous Pathogenicity Index (IVPI). Methods: Twenty pigeon organ samples were obtained from bird markets in East Java, and one was used as a positive control (LaSota). Organs were isolated from embryonated chicken eggs, identified by the HA test, and then confirmed by the HI test. Furthermore, positive samples were tested for MDT with a 10-1-10-18 dilution (0.1 ml and observed for eight days. The ICPI test used a fresh NDV suspension (0.05 ml and was observed for eight days. The IVPI test used a dose of 0.1 ml and was observed for ten days. Result: The MDT values of isolates MB1/NDV/19, MB2/NDV/19, MB3/NDV/19, and MG1/NDV/19 were 91.2 hours, 112.8 hours, 110.4 hours, and 124,8 hours. The ICPI values of isolate MB1/NDV/19 was 0.2375, MB2/NDV/19 was 0.375, MB3/NDV/19 was 0.5375, and MG1/NDV/19 was 0.3. The IVPI value of isolate MB1/NDV/19 was 0, MB2/NDV/19 was 0, MB3/NDV/19 was 0, and MG1/NDV/19 was 0. Conclusion: All four field samples were positive for NDV as a lentogenic strain based on the MDT, ICPI, and IVPI tests.