FOODS 25/02/20 Enterotoxin Genes, Antibiotic Susceptibility, and Biofilm Formation of Low-Temperature-Tolerant Bacillus cereus Isolated from Green Leaf Lettuce in the Cold Chain. The prevalence and characteristics of low-temperature-tolerant Bacillus cereus (psychrotolerant B. cereus) in green leaf lettuce collected during cold chain were investigated.
Among the 101 isolated B. cereus samples, only 18 were capable of growth at 7 °C, and these isolates shared potential health hazard characteristics with mesophilic isolates. Most psychrotolerant B. cereus isolates contained various combinations of nheA, nheB, nheC,hblA, hblA, hblC, hblD, cytK, and entFM. Most isolates of psychrotolerant B. cereus possessed at least two enterotoxin genes and 28% of isolates harbored tested nine enterotoxin genes. Additionally, the psychrotolerant B. cereus isolates showed resistance to tetracycline and rifampin and intermediate levels of resistance to clindamycin.
A total of 23% of isolates among psychrotolerant B. cereus displayed a high level of biofilm formation at 7 °C than at 10 °C or 30 °C. ►▼ Show Figures Figure 1 ►▼ Show Figures Figure 1. Open Vet J. 2017; 7(4): 337–341. Prevalence and antimicrobial resistance of Bacillus cereus isolated from beef products in Egypt. JOURNAL OF BACTERIOLOGY, Nov. 2009, p. 7063–7073 The dlt Operon of Bacillus cereus Is Required for Resistance to Cationic Antimicrobial Peptides and for Virulence in Insects. International Journal of Food Microbiology Volume 147, Issue 1, 14 May 2011, Genetic diversity, antimicrobial resistance and toxigenic profiles of Bacillus cereus isolated from food in Brazil over three decades.
Abstract Hospital infection is one of the important agent morbidity and mortality in patient.
Bacillus cereus is one of the bacteria that cause nosocomial infection. Hospital surfaces and staff hands have important to creation nosocomial infections. Hospital surfaces have potentional capacity to carry bacteria and staff hands are the most reason for the transmission of bacteria to hospital. The present study was performed at one tertiary care hospitals in Isfahan, Iran. African Journal of Microbiology Research Vol. 5(21), pp. 3414-3421, 9 October, 2011 Survey role of nano structure surface layer. Abstract The most common surface structures bacteria are monomolecular crystalline arrays of proteinaceous subunits termed surface layers or S-layers.
Since S-layer-carrying organisms are ubiquitous in the biosphere and because S-layers represent one of the most abundant cellular proteins, it is now obvious that these metabolically expensive products must provide the organisms with an advantage of selection in very different habitats. S-layers have been associated with a number of possible functions that relate to pathogenicity. S-layers can function as adhesins, enabling the bacterium to adhere to host cell membranes and tissue surfaces in order to colonize and protect bacteria from harmful enzymes and antimicrobial agents or changes in pH. Appl. Environ. Microbiol. February 2008 Identification of β-Lactamase in Antibiotic-Resistant Bacillus cereus Spores.
Β-Lactamase type I is reported for the first time to occur in the sporulated form in a penicillin-resistant Bacillus species.
The enzyme was readily characterized from the B. cereus 5/B line (ATCC 13061) by mass spectrometry and two-dimensional gel electrophoresis. A common cause of antibiotic resistance in bacteria is an increased abundance of β-lactamases (10). This can be the result of genetic engineering (16), or it can be caused by the selection of resistant variants in the presence of antibiotics. β-Lactamase genes are found in the wild-type genomes of many bacteria, including Bacillus species.
These chromosomal β-lactamases do not generally provide effective antibiotic resistance in wild-type bacilli, despite evidence that the genes are not completely silenced (1, 11, 14). Vet. Med. – Czech, 48, 2003 (11): 331–338 The prevalence of and resistance to antimicrobial agents of Bacillus cereus isolates f. Journal of Food Safety Volume 31, Issue 4, pages 559–569, November 2011 QUANTIFICATION AND ANTIBIOTIC SUSCEPTIBILITY PROFILES OF.
J Food Prot. 2012 Feb;75(2):225-30. Genetic diversity, antimicrobial resistance, and toxigenic profiles of Bacillus cereus strai.