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Category: Clinical Microbiology
The Impact of Molecular Diagnostics on Surveillance of Foodborne Infections, Page 1 of 2
< Previous page | Next page > /docserver/preview/fulltext/10.1128/9781555819071/9781555819088.ch19-1.gif /docserver/preview/fulltext/10.1128/9781555819071/9781555819088.ch19-2.gifAbstract:
The Centers for Disease Control and Prevention (CDC) estimates that foodborne diseases cause illness in one in six Americans (or 48 million people) each year, leading to 128,000 hospitalizations and 3,000 deaths (1, 2). Among the known foodborne pathogens, bacteria proportionally cause the most severe illness, being associated with 64% of hospitalizations and 64% of the deaths. The foodborne bacteria associated with most hospitalizations and deaths are Salmonella, Campylobacter, Shiga toxin-producing Escherichia coli (STEC), and Listeria monocytogenes. These bacteria are all zoonotic; i.e., they may be found in the normal intestinal biota of animals without causing disease and may spread to the environment and contaminate the food we eat.
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Schematic analytical principle of three approaches to whole-genome sequence analysis. (A) kmer, (B) hqSNP, (C) wgMLST.
Schematic analytical principle of three approaches to whole-genome sequence analysis. (A) kmer, (B) hqSNP, (C) wgMLST.
hqSNP (A) and wgMLST (B) trees of isolates of Listeria monocytogenes that are indistinguishable by PFGE (C). Isolates associated with an outbreak related to consumption of artisan cheese are highlighted with brackets and shown along with contemporary and historical isolates with no relation to the outbreak. The isolates from the patient who did not consume the artisan cheese product or did not have exposure information are denoted. The hqSNP and wgMLST analyses produced equivalent results.The hqSNPs were defined by consensus ≥75% and coverage ≥×10. The wgMLST analysis and UPGMA tree was generated using BioNumerics 7.5 (Applied Maths).
hqSNP (A) and wgMLST (B) trees of isolates of Listeria monocytogenes that are indistinguishable by PFGE (C). Isolates associated with an outbreak related to consumption of artisan cheese are highlighted with brackets and shown along with contemporary and historical isolates with no relation to the outbreak. The isolates from the patient who did not consume the artisan cheese product or did not have exposure information are denoted. The hqSNP and wgMLST analyses produced equivalent results.The hqSNPs were defined by consensus ≥75% and coverage ≥×10. The wgMLST analysis and UPGMA tree was generated using BioNumerics 7.5 (Applied Maths).
Key characteristics of different whole-genome sequencing analysis techniques used in outbreak investigations
Key characteristics of different whole-genome sequencing analysis techniques used in outbreak investigations