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Volume 18, Number 9—September 2012

Letter

Aeromonas spp. Bacteremia in Pregnant Women, Thailand–Myanmar Border, 2011

Paul TurnerComments to Author , Charlotte Willemse, Kawalee Phakaudom, Thet Wai Zin, Francois Nosten, and Rose McGready
Author affiliations: Shoklo Malaria Research Unit, Mae Sot, Thailand (P. Turner, C. Willemse, K. Phakaudom, T.W. Zin, F. Nosten, R. McGready); Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, Thailand (P. Turner, F. Nosten, R. McGready); and University of Oxford, Oxford, UK (P. Turner, F. Nosten, R. McGready)

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Table

Characteristics of Aeromonas spp. isolates from blood of 3 pregnant women, Thailand–Myanmar border, January–May 2011*

Characteristic Patient no., organism
1, A. hydrophila 2, A. veronii biovar sobria 3, A. veronii biovar sobria
Species identification results

Growth in 1% NaCl

+ + +

Growth in 6% NaCl

Growth on TCBS agar (colonies)

+/– (yellow) +/– (yellow) +/– (green)

Glucose fermentation

+ + +

Oxidase

+ + +

O129 susceptibility (10 µg/150 µg)

–/– –/– –/–

Esculin hydrolysis

+

Indole

+ + +

Voges-Proskauer

+ + +

Gas from glucose (TSI)

+ + +

Acid from arabinose

Cephalothin susceptibility (30 µg) +

Antimicrobial drug susceptibilities (zone diameter, mm)

Ampicillin (10 µg)

NA (6) NA (6) NA (6)

Ceftazidime (30 µg)

S (30) S (31) S (32)

Ceftriaxone (30 µg)

S (26) S (40) S (31)

Meropenem (10 µg)

S (30) S (28) S (23)

Chloramphenicol (30 µg)

S (30) S (31) S (28)

Ciprofloxacin (5 µg)

S (33) S (35) S (26)

Co-trimoxazole (25 µg)

S (24) S (22) S (23)

Gentamicin (10 µg)

S (20) S (19) S (18)

*TCBS, thiosulfate-citrate-bile salts-sucrose; O129, disks impregnated with 2,4-diamino-6,7di-iso-propylpteridine phosphate for the presumptive identification of Vibrio spp. from other gram-negative rods; TSI, triple sugar iron; NA, not applicable; S, susceptible (derived according to criteria from [4]).

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