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Volume 23, Number 5—May 2017

Virulence Analysis of Bacillus cereus Isolated after Death of Preterm Neonates, Nice, France, 2013

Romain Lotte, Anne-Laure Hérissé, Yasmina Berrouane, Laurène Lotte, Florence Casagrande, Luce Landraud, Sabine Herbin, Nalini Ramarao, Laurent BoyerComments to Author , and Raymond RuimyComments to Author 
Author affiliations: Centre Hospitalier Universitaire de Nice, Nice, France (R. Lotte, A.-L. Hérissé, Y. Berrouane, L. Lotte, F. Casagrande, L. Landraud, R. Ruimy); Université de Nice Côte d’Azur, INSERM, C3M, Nice (R. Lotte, L. Lotte, L. Landraud, L. Boyer, R. Ruimy); INSERM U1065, C3M, Team 6, Nice (R. Lotte, L. Boyer, R. Ruimy); Food Safety Laboratory, Maison Alfort, France (S. Herbin); Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France (N. Ramarao)

Main Article

Table 2

Virulence factor analysis of strain characteristics of bacteriologic samples obtained after deaths of 2 preterm neonates with Bacillus cereus infection, Nice, France, 2013*

Tested strain Source of sample Gene
Genotype group (%) Nhe production inde)† Hbl detection limit
cytK1 cytK2 ces hlyII
First newborn Tracheobronchial aspiration + III (99.72) +++
Second newborn Blood culture + IV (100) + 1/64
Second newborn Catheter + IV (100) + 1/64
Environmental isolate 1 Incubator surface, first newborn II (97.71) ++
Environmental isolate 2 Incubator surface, first newborn + III (99.72) +++
Environmental isolate 3 Incubator surface, first newborn + + IV (100) +++ 1/64
Environmental isolate 4 Ultrasonographic probe + IV (100) +++ 1/32
Environmental isolate 5 Bench surface used for bottle feeding III (100) +++

*Hbl, hemolytic BL toxin; Nhe, nonhemolytic enterotoxin; +, positive; –, negative.
†Nhe production level: +, low; ++ moderate; +++, high.

Main Article

Page created: April 17, 2017
Page updated: April 17, 2017
Page reviewed: April 17, 2017
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