Morphological characteristics, such as shapes, Gram reaction
(Hucker and Conn, 1923), spore formation, motility, and catalase
activity (Whittenbury, 1964) of all isolates, were performed
by standard procedures. Motility of bacteria was
observed by hanging drop method as described by Bertrand
et al. (2001). The method to determine spore forming bacteria
was followed as described by Harrigan and MacCance (1976).