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Primary cultures represent the most reliable method to isolate and propagate field isolates of African swine fever virus (ASFV ). Within the pig ASFV predominantly targets the reticuloendothelial system for replication; therefore, primary macrophage cell cultures are commonly used to isolate, propagate, and study the virus life cycle in the laboratory. In this chapter we will describe methods for the direct isolation of pulmonary alveolar macrophages by lung lavage and the culture of monocyte-derived macrophages from pig blood. We also include a method for the positive selection of CD14+ monocytes as a source for monocyte-derived macrophages from pig blood using microbeads.

Real-time polymerase chain reaction (PCR) for the detection of African swine fever virus (ASFV) is the tool of choice for the diagnostic laboratory and is a robust and easily scalable method for the researcher analyzing viral replication both in vitro and in vivo. In this chapter, we describe protocols for both quantitative real-time polymerase chain reactions (qPCR) and non-quantitative real-time polymerase chain reactions (real-time PCR) for the detection of African swine fever virus genome in a range of samples.