Dataset Information

Two Complete and One Draft Genome Sequence of Nonproteolytic Clostridium botulinum Type E Strains NCTC 8266, NCTC 8550, and NCTC 11219.

ABSTRACT: Group II (gII) nonproteolytic Clostridium botulinum strains are a major cause of foodborne botulism outbreaks. Here, we report two complete genome sequences of gII type E strains NCTC 8266 and NCTC 8550 and one draft genome sequence of type E NCTC 11219.

SUBMITTER: Clauwers C

PROVIDER: S-EPMC4357750 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature

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Two Complete and One Draft Genome Sequence of Nonproteolytic Clostridium botulinum Type E Strains NCTC 8266, NCTC 8550, and NCTC 11219.

Clauwers Charlien C Briers Yves Y Lavigne Rob R Michiels Chris W CW

Genome announcements 20150312 2

Group II (gII) nonproteolytic Clostridium botulinum strains are a major cause of foodborne botulism outbreaks. Here, we report two complete genome sequences of gII type E strains NCTC 8266 and NCTC 8550 and one draft genome sequence of type E NCTC 11219. ...[more]

PMID: 25767228

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Project description:UnlabelledHeat treatment is an important controlling factor that, in combination with other hurdles (e.g., pH, aw), is used to reduce numbers and prevent the growth of and associated neurotoxin formation by nonproteolytic C. botulinum in chilled foods. It is generally agreed that a heating process that reduces the spore concentration by a factor of 10(6) is an acceptable barrier in relation to this hazard. The purposes of the present study were to review the available data relating to heat resistance properties of nonproteolytic C. botulinum spores and to obtain an appropriate representation of parameter values suitable for use in quantitative microbial risk assessment. In total, 753 D values and 436 z values were extracted from the literature and reveal significant differences in spore heat resistance properties, particularly those corresponding to recovery in the presence or absence of lysozyme. A total of 503 D and 338 z values collected for heating temperatures at or below 83°C were used to obtain a probability distribution representing variability in spore heat resistance for strains recovered in media that did not contain lysozyme.ImportanceIn total, 753 D values and 436 z values extracted from literature sources reveal significant differences in spore heat resistance properties. On the basis of collected data, two z values have been identified, z = 7°C and z = 9°C, for spores recovered without and with lysozyme, respectively. The findings support the use of heat treatment at 90°C for 10 min to reduce the spore concentration by a factor of 10(6), providing that lysozyme is not present during recovery. This study indicates that greater heat treatment is required for food products containing lysozyme, and this might require consideration of alternative recommendation/guidance. In addition, the data set has been used to test hypotheses regarding the dependence of spore heat resistance on the toxin type and strain, on the heating technique used, and on the method of D value determination used.

Dataset Information

Two Complete and One Draft Genome Sequence of Nonproteolytic Clostridium botulinum Type E Strains NCTC 8266, NCTC 8550, and NCTC 11219.

Publications

Two Complete and One Draft Genome Sequence of Nonproteolytic Clostridium botulinum Type E Strains NCTC 8266, NCTC 8550, and NCTC 11219.

Similar Datasets

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