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. 2013 Feb 4;8(2):e55658. doi: 10.1371/journal.pone.0055658

Figure 2. Evolution of Lysinibacillus sphaericus and Bacillus thuringiensis israelensis spores in water and sludge samples collected in treated catch basins (average±SE).

Figure 2

Symbols: ○ = Lsph spores per ml of water; • = Bti spores per ml of water; □ = Lsph spores per gram of sludge; ▪ = Bti spores per gram of sludge.