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Burkholderia
Published in Dongyou Liu, Handbook of Foodborne Diseases, 2018
Danielle L. Peters, Jaclyn G. McCutcheon, Karlene H. Lynch, Jonathan J. Dennis
Despite their potential for wide distribution in food products, the presence of Bcc bacteria in foods has only been detected in unpasteurized milk.29–33 It is unknown how milk becomes contaminated, but it has been suggested that it is due to transfer of Bcc organisms from the soil to the cow udder and then to milk storage tanks.34 Berriatua et al.2 showed that Bcc species Burkholderia cenocepacia and Burkholderia vietnamiensis were responsible for causing subclinical mastitis in milking sheep. However, when Moore et al.34 examined milk samples taken from cows with mastitis, they were unable to isolate Bcc bacteria. Despite Bcc contamination of unpasteurized milk, these bacteria are not found in commercially available dairy products and are effectively killed by pasteurization.29,34
Burkholderia
Published in Dongyou Liu, Laboratory Models for Foodborne Infections, 2017
Danielle L. Peters, Fatima Kamal, Jonathan J. Dennis
Despite their occasional identification in food products, including bakery items, onions, cheese, ham, and oranges, in an extensive examination of different foods, Moore et al.83 were only able to isolate Bcc from unpasteurized milk. Similarly, Bcc species were isolated from unpasteurized milk by Uraz and Çitak84,85 and Munsch-Alatossava and Alatossava.86,87 It is unknown how milk becomes contaminated, but possibly it is through transfer of Bcc organisms from soil to the cow udder and/or to milk storage tanks.88 However, the Bcc are not found in commercially available dairy products and are effectively killed by pasteurization.83,88 Berriatua et al.2 found that the Bcc species Burkholderia cenocepacia and Burkholderia vietnamiensis were responsible for causing subclinical mastitis (inflammation of the udder) in milking sheep. However, when Moore et al.88 examined milk samples taken from cows with mastitis to determine whether this condition was responsible for the contamination, they were unable to isolate Bcc organisms.
Experience of Ceftazidime/avibactam in a UK tertiary cardiopulmonary specialist center
Published in Expert Review of Anti-infective Therapy, 2021
Lisa Nwankwo, Zahraa Butt, Silke Schelenz
A total of 35 culture positive samples were isolated from the 28 patients. Five NTM cultures were isolated from four patients and did not undergo further sensitivity testing as NTM is not routinely tested for ceftazidime/avibactam susceptibility. The NTM species isolated were all Mycobacterium abscessus (Mab). From the remaining 30 isolates eligible for susceptibility testing to Ceftazidime/avibactam, three MDR pseudomonas isolates were not tested. The MDR organisms isolated from the remaining 27 microbiology positive isolates include the genera of Pseudomonas, Klebsiella, Burkholderia, Enterobacter, and Achromobacter. We observed an overall in vitro Ceftazidime/avibactam susceptibility of 56%; 15/27 isolates. There was 100% Ceftazidime/avibactam resistance to MDR Enterobacter aerogenes (1 isolate, New Delhi metallo-beta-lactamase (NDM) resistance mechanism thus expected), 75% resistance to MDR Achromobacter (three-fourths isolates), and 50% to Burkholderia (two-fourths isolates). Two isolates of Burkholderia (both Burkholderia cepacia complex) demonstrated sensitivity to Ceftazidime/avibactam, and two were resistant (one was Burkholderia gladioli, and the other was Burkholderia vietnamiensis). Sixty-seven percent sensitivity was seen with MDR Pseudomonas (10/15 isolates) in mixed CF and non-CF patient cohorts, and 67% sensitivity for MDR Klebsiella (two-thirds isolates). Where there was failed ceftazidime/avibactam susceptibility to MDR pseudomonas, one isolate was found to be positive for metallo-beta-lactamase production, and one was determined through Variable-Number Tandem Repeat (VNTR) Typing Analysis at the Reference lab, to be of the epidemic Manchester strain, a highly resistant and transmissible strain observed in some CF populations [25,26].
Dilemma in identifying Chryseobacterium species
Published in Infectious Diseases, 2018
As with Elizabethkingia species, C. indologenes has also been misidentified. In a study by Filho et al. [4], out of 11 isolates of C. indologenes, only four were correctly identified using MALDI-Bruker. Others were misidentified as C. gleum (three isolates), Chryseobacterium species (two isolates), S. maltophilia (one isolate) and Burkholderia vietnamiensis (one isolate).