Request for tender. A request for tenders (RFT) is a formal, structured invitation to suppliers to submit a bid to supply products or services.
Altogether 786 isolates from time interval 2008-2010 were grouped into 90 PCR ribotypes and eleven of them were shared among all host types and the environment. Ribotypes that were most common in humans were also present in water and different animals (014/020, 002, 029). Interestingly, non-toxigenic isolates were very common in the environment (30.8%) in comparison to humans (6.5%) and animals (7.7%). A high degree of similarity was observed for human and animal isolates with PFGE.
Some individual colonies might show characteristic features of some organism. In order to conclude isolation of organism is done from a mixed culture.Sometimes the mixed culture might have too many organisms that it requires to find one specific organism, in such cases individual colonies are isolated. Source(s): http://classof1.com/homework_answers/bio... Benny Â· 5 years ago. Thumbs up.