BUTTERWORTH: Factories here have dived throat-first into the on-site polymerase chain reaction (RT-PCR) testing using the Deep Throat Saliva method. The move to allow mass screening of manufacturing sector workers in Penang using the Deep Throat Saliva method is to help contain Covid-19 cases before new clusters form in the sector. Menara Kerjaya Fastening Sdn Bhd general manager Sim Saw Beng said all 111 of his workers, including himself, will be tested at his factory. His is the fifth factory in the state to test workers since the initiative started on Saturday (May 22). Federation of Malaysian Manufacturers (FMM) Penang chairman Datuk Jimmy Ong said there are 400,000 factory workers in the state.