Abstract:
:"Viili," a fermented milk product, has a firm but viscous consistency. It is produced with traditional mesophilic mixed-strain starters, which have various stabilities in dairy practice. Thirteen morphologically different types of phages were found in 90 viili samples studied by electron microscopy. Ten of the phage types had isometric heads with long, noncontractile tails, two had elongated heads with long, noncontractile tails, and one had a unique, very long elongated head with a short tail. Further morphological differences were found in the tail size and in the presence or absence of a collar, a baseplate, and a tail fiber. To find hosts for the industrially significant phages, we examined the sensitivities of 500 bacterial isolates from starters of the viili. Seven of the phages attacked Streptococcus cremoris strains, three attacked S. lactis subsp. diacetylactis strains, and four attacked Leuconostoc cremoris strains. Some phages differed only in their host specificity. Hosts were not found for 4 of the 13 morphological types of phages.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Saxelin ML,Nurmiaho-Lassila EL,Meriläinen VT,Forsén RIdoi
10.1128/AEM.52.4.771-777.1986keywords:
subject
Has Abstractpub_date
1986-10-01 00:00:00pages
771-7issue
4eissn
0099-2240issn
1098-5336journal_volume
52pub_type
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