Use of Salicin-Rhamnose-Cellobiose-4-Methylumbelliferyl-b-D Glucuronide&#8211;Sorbitol MacConkey (SRC-MUG-SMAC) Differential Agar for the Presumptive Identification of Escherichia coli O157 from the Primary Isolation Step

Murat GÜLMEZ; Leyla VATANSEVER; Abamüslüm GÜVEN; Berna DUMAN; Çiğdem SEZER

Makale detayları

Use of Salicin-Rhamnose-Cellobiose-4-Methylumbelliferyl-b-D Glucuronide–Sorbitol MacConkey (SRC-MUG-SMAC) Differential Agar for the Presumptive Identification of Escherichia coli O157 from the Primary Isolation Step

Yazarlar:

Murat GÜLMEZ | Leyla VATANSEVER | Abamüslüm GÜVEN | Berna DUMAN | Çiğdem SEZER

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2005 Vol.29 Issue 5, pp.1137-1141

Belge Tipi:

Makale

Yayın Tarihi:

4/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000768687

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Anahtar kelimeler:

Özet:

 

A differential agar for the further detection of presumptive Escherichia coli O157 strains among typical sorbitol negative and cefixime-tellurite resistant strains was investigated. For this purpose, in parallel to colonies of 8 reference strains, 1130 suspect colonies picked from the surface of cefixime-tellurite (CT)-sorbitol MacConkey (SMAC) (CT-SMAC) agar plates of food samples (white cheese, raw milk and ground beef) were transferred to differential agar plates. After a 6-h incubation period at 42 ºC, only 47 (4.15%) of the 1130 colonies appeared as typical E. coli O157 on the differential agar plates (100 x 15 mm) gridded into 25 numbered sections. Salicin (S), rhamnose (R) and cellobiose (C) were tested separately and together in combination with MUG. The best results were obtained from the combined use of the 3 in SMAC medium (SRC-MUG-SMAC). When violet red bile lactose agar (VL) was used in the same manner as SRC-MUG-SMAC, only 16 (1.41%) of the 1130 colonies remained typical. In this procedure, no biochemical test was required for further identification. The use of an SRC-MUG-SMAC plate immediately after the colony selection step appeared to be more discriminative than the addition of these sugars and MUG to the primary isolation media. As a result, the testing of presumptive E. coli O157 colonies using a differential agar plate including MUG and 3 (or more) sugars that are not fermented by this organism is a rapid, easy, precise and relatively inexpensive isolation procedure, and it is particularly ideal for use in routine screening laboratories.

 

A differential agar for the further detection of presumptive Escherichia coli O157 strains among typical sorbitol negative and cefixime-tellurite resistant strains was investigated. For this purpose, in parallel to colonies of 8 reference strains, 1130 suspect colonies picked from the surface of cefixime-tellurite (CT)-sorbitol MacConkey (SMAC) (CT-SMAC) agar plates of food samples (white cheese, raw milk and ground beef) were transferred to differential agar plates. After a 6-h incubation period at 42 ºC, only 47 (4.15%) of the 1130 colonies appeared as typical E. coli O157 on the differential agar plates (100 x 15 mm) gridded into 25 numbered sections. Salicin (S), rhamnose (R) and cellobiose (C) were tested separately and together in combination with MUG. The best results were obtained from the combined use of the 3 in SMAC medium (SRC-MUG-SMAC). When violet red bile lactose agar (VL) was used in the same manner as SRC-MUG-SMAC, only 16 (1.41%) of the 1130 colonies remained typical. In this procedure, no biochemical test was required for further identification. The use of an SRC-MUG-SMAC plate immediately after the colony selection step appeared to be more discriminative than the addition of these sugars and MUG to the primary isolation media. As a result, the testing of presumptive E. coli O157 colonies using a differential agar plate including MUG and 3 (or more) sugars that are not fermented by this organism is a rapid, easy, precise and relatively inexpensive isolation procedure, and it is particularly ideal for use in routine screening laboratories.

Makale detayları

Use of Salicin-Rhamnose-Cellobiose-4-Methylumbelliferyl-b-D Glucuronide–Sorbitol MacConkey (SRC-MUG-SMAC) Differential Agar for the Presumptive Identification of Escherichia coli O157 from the Primary Isolation Step

Yazarlar:

Murat GÜLMEZ | Leyla VATANSEVER | Abamüslüm GÜVEN | Berna DUMAN | Çiğdem SEZER

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2005 Vol.29 Issue 5, pp.1137-1141

Belge Tipi:

Makale

Yayın Tarihi:

4/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000768687

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

E. coli O157

salicin

rhamnose

cellobiose

MUG

Sayı

Makale detayları

Use of Salicin-Rhamnose-Cellobiose-4-Methylumbelliferyl-b-D Glucuronide&#8211;Sorbitol MacConkey (SRC-MUG-SMAC) Differential Agar for the Presumptive Identification of Escherichia coli O157 from the Primary Isolation Step

Yazarlar: Murat GÜLMEZ | Leyla VATANSEVER | Abamüslüm GÜVEN | Berna DUMAN | Çiğdem SEZER

Yayıncı: TUBITAK

Dergi: Turkish Journal of Veterinary and Animal Sciences 2005 Vol.29 Issue 5, pp.1137-1141

Belge Tipi: Makale

Yayın Tarihi: 4/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000768687

Sıklık: İki Aylık

eISSN: 1303-6181

pISSN: 1300-0128

E. coli O157

salicin

rhamnose

cellobiose

MUG

Sayı

Use of Salicin-Rhamnose-Cellobiose-4-Methylumbelliferyl-b-D Glucuronide–Sorbitol MacConkey (SRC-MUG-SMAC) Differential Agar for the Presumptive Identification of Escherichia coli O157 from the Primary Isolation Step

Yazarlar:

Murat GÜLMEZ | Leyla VATANSEVER | Abamüslüm GÜVEN | Berna DUMAN | Çiğdem SEZER

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2005 Vol.29 Issue 5, pp.1137-1141

Belge Tipi:

Makale

Yayın Tarihi:

4/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000768687

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128