Sub-Types of Cholera Vibrio Isolated from Cholera Patients in Bombay

That the strains of cholera vibrio isolated m epidemic and sporadic outbreaks differed frona each other on immunological grounds was first demonstrated by Japanese workers as early as 1913 ; they called them 1 original' and ' varied respectively (Kabeshmia, 1913). It was left to Gardner and Venkatraman (1935) however to confirm the existence of serological sub-types within the classical sub-group I among the diverse heat-stable 0 antigens, and to designate them as types ' Inaba' and ' Ogawa '. Observations on the serological sub-types of cholera vibrio in relation to sporadic and epidemic outbreaks in different parts of India are very scanty. While a few such investigations undertaken refer to such areas as Northern India, Bengal, Assam, Burma and Madras, n? information is available as to the serological sub-types encountered in outbreaks in and around Bombay. The object of this communication is, therefore, to record the results of such