The emergence of the infection of subgroup J avian leucosis virus escalated the tumour incidence in commercial Yellow chickens in Southern China in recent years

• DOI: 10.1111/tbed.13023
• Publication Date: 2018-09-24T17:16:19Z
• Authors: Haijuan Li; Peikun Wang; Lulu Lin; Mengya Shi; Zhanming Gu; Teng Huang; Mei‐lan Mo; Tianchao Wei; Huanmin Zhang; Ping Wei
• Keywords: Leucosis; Avian leukosis

A total of 81 clinical cases suspected tumours were submitted to our laboratory from Yellow chicken farms in southern China during the years 2010 through 2017. The tumour-like tissue samples closely examined for common oncogenic avian viruses cell culture and further analysed using polymerase chain reaction (PCR). During 2010-2012, Marek's disease virus (MDV) mono-infection was found be dominant cause tumour incidences (52.4%, 11/21) followed by co-infection MDV+ALVs (19.1%, 4/21). Starting year 2013 leucosis subgroup J (ALV-J) became agent (83.3%, 5/6). most recent four (2014-2017), co-infections involving ALV-J MDV or between ALV subgroups have increased (23.4% 18.5%, respectively), but each still slightly lower than incidence (33.3%). In contrast before 2013, more recently, emerging largely responsible occurrence virus-induced commercial local breeds chickens China. These results indicate that eradication measures against on all farms, especially with chickens, ought enhanced reverse this trend.