ERP Micro December 2019

B astin et al . : J ournal of AOAC I nternational V ol . 102, N o . 5, 2019  1603

Table 2017.09H. Summary of results for the confirmation of Gram-negative organisms ( Cronobacter exclusivity)

MALDI Biotyper correctly confirmed

Ref. correctly confirmed

MALDI Biotyper incorrectly confirmed

Ref. incorrectly confirmed

Selective media no growth

MALDI Biotyper total

Ref. total

Organism

Citrobacter farmeri ATCC 51633 a Citrobacter freundii QL11007.10 b Escherichia coli ATCC 10536

42 40 42 42 36 42 37 42

12 14 13 14 14 10 14 14

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 2 0 0 6 0 5 0

42 40 42 42 36 42 37 42

14 14 14 14 14 14 14 14

Hafnia alvei ATCC 51815

Klebsiella pneumoniae ATCC 10031 Pseudomonas aeruginosa ATCC 35032

Salmonella Hadar ATCC 51956 Serratia marcescens QL11007.1

323 c

112 d

Total isolates

323

112

13

a  ATCC = American Type Culture Collection biological materials resource (Manassas, VA). b  QL = Q Laboratories collection (Cincinnati, OH). c  The total numbers represent isolates analyzed on the three recommended culture media: Tryptic Soy Agar, Cronobacter Chromogenic Isolation Agar, and Enterobacter sakazakii Isolation Agar. d  Reference method performed from Tryptic Soy Agar plates only.

Table 2017.09I. Summary of results for the confirmation and identification of Campylobacter (inclusivity)

MALDI Biotyper correctly identified

Ref. correctly identified

MALDI Biotyper incorrectly identified

Ref. incorrectly identified

MALDI Biotyper not tested

MALDI Biotyper total

Ref. not tested

Ref. total

Organism

Campylobacter jejuni ATCC BAA-1062 a Campylobacter jejuni QL 022117.1 b Campylobacter jejuni QL 022117.2 Campylobacter jejuni QL 012516.11 Campylobacter jejuni QL 012516.12 Campylobacter jejuni QL 012516.13 Campylobacter jejuni QL 101998 Campylobacter jejuni QL 040698 Campylobacter coli QL 032817.1 Campylobacter coli ATCC 43481 Campylobacter coli ATCC BAA-1061 Campylobacter coli CCUG 10772 c Campylobacter coli CCUG 14537 Campylobacter lari CCUG 15031 Campylobacter lari CCUG 15035 Campylobacter lari QL 040117.8

66 65 66 65 66 66 65 66 65 65 64 65 65 63 62 66

17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

2 3 2 3 2 2 3 2 3 3 4 3 3 5 6 2

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

66 65 66 65 66 66 65 66 65 65 64 65 65 63 62 66

17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17

48 d

1040 e

272 f

Total Isolates

1040

272

a  ATCC = American Type Culture Collection biological materials resource (Manassas, VA). b  QL = Q Laboratories collection (Cincinnati, OH). c  CCUG = Culture Collection University of Gothenburg (Gothenburg, Sweden). d  Results from modified Charcoal Cefoperazone Deoxycholate Agar were excluded for two participants, and one participant was not able to complete testing because of unforeseen circumstances. Other participants obtained no growth on a variety of agars. e  The total numbers represent isolates analyzed on the four recommended culture media: Columbia Blood Agar, modified Charcoal Cefoperazone Deoxycholate Agar, RAPID’ Campylobacter Agar, and Campy Cefex Agar. f  Reference method performed from the nonselective Columbia Blood Agar plates only.