• A Sinorhizobium meliloti collection (1443 strains stored at –80°C) representative of the intraspecific variation in relation to ecogeographic and bioagronomic characteristics of the isolation environments and the genetic diversity of the host plant

• The dairy bacteria collection (www.colmia.it)  consists mostly of lactic acid bacteria (LAB) isolated from dairy sources but there are also present spoilage and food pathogenic bacteria of dairy interest, as well bacteriophages. This collection represents an important source of biodiversity, as the strains have been isolated over several years from different traditional or industrial dairy products (raw milk, fermented milks, cheeses), geographical areas, and production plants.

The collection includes about 5000 strains: 1300 LAB identified and typed by phenotypic and molecular methods, further 2500 uncharacterized LAB isolates, about 500 strains of non-LAB bacterial species, and 60 bacteriophages of thermophilic lactobacilli.

The LAB collection of identified strains includes:

Streptococcus thermophilus (200 strains); thermophilic lactobacilli (Lactobacillus helveticus, Lactobacillus delbrueckii sp. lactis) (450); mesophilic lactobacilli (Lactobacillus plantarum, Lactobacillus casei/paracasei/rhamnosus) (270); Lactococcus spp. (180); Leuconostoc spp. (30); Enterococcus spp. (180).

Among non-LAB bacterial species are included clostridia, enterobacteria, propionibacteria, staphylococci, and listeria.