A new group of filterable organisms

Publisher Website
Google Scholar
Abstract
A group of organisms of small size has been discovered which can be cultivated in indefinite series. The organisms form a well-defined group and have both relatively large and small forms. The smaller forms appear to be as small as vaccinia virus and from them the larger forms readily develop. Occurrence The organisms have been obtained from all samples of raw sewage so far examined from four London districts during the summer. They have not been detected in London tap-water, or faecal material from man, pig, rabbit, or rat.