ABSTRACT
L. lactis phages and similarly Lactobacillus helveticus
phages were found to exhibit very high thermal resistance
whereas phages of Streptococcus thermophilus were less
heat resistant. Lactobacillus delbrueckii and Lactobacillus
casei/paracasei phages have proved rather heat sensi-
tive.[4-8] In this report we therefore focus on L. lactis
phages. Three predominant phage species account for
98% of all known L. lactis phages.[9] These species and
their morphotypes are depicted in Table 1.
