The bacteria were quickly and totally destroyed by an unknown agent in the filtrate that Hérelle termed an "invisible microbe"; he later renamed it a bacteriophage.
In early January, alarmed health departments in Shunde, Heyuan and Zhongshan all reported the strange pneumonia clusters to Guangdong provincial authorities, who concluded that they were facing a highly infectious pneumonia caused by a previously unknown agent.
Better and faster gathering of information on symptoms that people are reporting to their doctors might allow an epidemic to be detected early, but if it was caused by a previously unknown agent that would be no help in treating it.
It wasn't until 3 years later, in 2012, that scientists reported that the patients had most likely been infected by a hitherto unknown agent.
[Wes] dialogic contraction: pronounce or proclaim paraphrase no passive voice, unknown agent yes Kumaravadivelu (2006:165) suggests a movement toward recognizing…[Mara] dialogic expansion: entertains paraphrase yes external voice no.
And when you put an unknown agent in the middle, it's going to be problematic".
The state Senate committee reported that an attempt to bribe Otis had been made by an unknown agent of Hanna; three Hanna aides, including Charles Dick, were implicated.
†Adjusted for unknown agent versus C. jejuni.
