RT Journal Article SR Electronic T1 1885 Cholera Controversy: Klein versus Koch JF Medical Humanities JO J Med Humanit FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 43 OP 47 DO 10.1136/jmh.2009.003558 VO 36 IS 1 A1 Bruno Atalic YR 2010 UL http://mh.bmj.com/content/36/1/43.abstract AB This paper will try to give new insight into the Cholera Controversy, which occurred 125 years ago. The majority of papers already written on the topic have emphasised the role of Robert Koch who described the comma bacillus as the cause of cholera epidemics. At the same time they have marginalised the role of Emanuel Edward Klein by stating that he was wrong when he objected to Robert Koch's statement, because as an employee of the British government he was politically motivated. Moreover, they have paid barely any attention to Klein's writings on the subject. In this paper I will try to approach his attitudes from the scientific, not political, perspective and try to explain the reasons why he challenged Koch.