7.3 Faecal streptococci
The faecal streptococci group of bacteria consists of the species Streptococcus faecalis (Figure 9), S. faecium, S. durans, S. equinus and S. bovis. The bacteria are approximately 1 µm in diameter and occur in chains of varying length. They die fairly quickly outside their host, so their presence is indicative of recent pollution.
