Author Archives: Tim Corbidge

Spontaneous Infection: Did You Leave the Back Door Open to Your Cultivation Suite?

Manufacture of biopharmaceuticals using mammalian cells inherently incurs a risk of viral contamination during cell cultivation. If introduced, viruses can infect and replicate in cells used to produce a therapeutic protein or vaccine. The consequences of such contaminations can be dramatic. Not only can a company lose contaminated batches, but it also faces potentially extensive root-cause investigations, facility cleanup efforts, and introduction of preventive measures. Until contamination issues are resolved adequately, production should not be resumed, and facility downtime brings…

How Much Harm Can a Single Droplet Do? Considerations for a Viral Inactivation Step

Viral clearance is a fundamental aspect of viral safety for biopharmaceutical products. Regulatory agencies around the world require biomanufacturers to segregate their operations appropriately to mitigate the risks of carryover contamination from previous process steps or product batches and of crossover contamination between product(s) made in the same facility. Guidelines are vague in defining “appropriate,” leaving biomanufacturers to interpret regulatory expectations and define their own virus reduction and segregation strategies. Given the differences among manufacturing processes and facilities housing such…

Shared Clean-in-Place Systems: To Share or Not to Share?

Risk of viral contamination is a an accepted part of developing biopharmaceutical products derived from mammalian-cell culture. Viral safety is achieved through a combination of complementary approaches such as selecting non–animal-derived raw materials, testing cell banks, testing for adventitious virus contamination during cultivation, and demonstrating viral reduction capacity of a purification process (1). The latter commonly is referred to as viral clearance by orthogonal purification. Clearly, viral clearance and appropriate viral segregation are important considerations in biopharmaceutical manufacturing process and…