The experience during African swine fever (ASF) virus outbreak can be devastating. This study aimed to assess the knowledge, attitude and practise among pig farmers to avoiding resurgence of ASF outbreaks in Oyo and Ogun States of Nigeria where ASF outbreaks had been earlier reported. Non participatory observations and participatory interviews using pre-tested structured questionnaire were conducted in 2016 among 92 consenting pig farms post-ASF outbreak. The study showed that one in two of pig farms studied had suffered from ASF outbreak before. Meanwhile, several bio-security breaches that facilitate ASF and other infectious agents spread were still maintained including ‘farm restocking with ASF survivor pigs’ (61.5%; 32/52), ‘boar lending among farms for breeding purposes without examination’ (54.3%; 50/92), ‘extensive system and semi-intensive pig management’ (21.7%; 20/92), ‘farm attendants sharing among pig farms’ (19.6%; 18/92), ‘farm equipment/ implements/ facilities sharing among farms’ (22.8%; 21/92), selling of pig carcass (9.8%; 9/92), ‘carcass disposal in the bush’ (19.6%; 18/92). In this study we found out that management and bio-security activities in the pig farms studied were still poor and could place them at high risk of infection and repeated disease outbreaks in the future. The study suggests that pig farmers had not learnt from the previous ASF outbreaks. Therefore, proper sensitization on ASF epidemiology, public health significance and socioeconomic impact should be carried out. This study calls for swift action to prevent future calamities in pig production facilities in the study areas. Keywords: African swine fever, Biosecurity, Nigeria, Outbreak, Sensitization