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Table 2 Resistance patterns and mechanisms of resistance

From: Molecular characterization of methicillin-resistant Staphylococcus aureus clinical strains from the endotracheal tubes of patients with nosocomial pneumonia

 

QRDR Mutations

Resistant genes

ETT code

STs

CC

Origin

Resistance patern

gyrA

gyrB

grlA

grlB

ERY- DA

GEN

TET

FA

1

ST954

CC22

HUCA

CIP - ERY- DA

  

S144P

K401R

ermC

   

2

ST87

CC59

HCP

ERY- TET

    

msrA

 

TeT K

 

3

*ST8

CC5

HCP

CIP - GEN - TET

S84L, T129I

 

S144P

K401R

 

aac(6´)-aph(2")

TeT K

 

4

ST217

CC22

HCP

CIP - ERY

S84L, S85P

 

S144P, V82S, Y83V, E84R

K401R, D507E

ermC

   

5

*ST8

CC5

HCP

ERY - TET

    

msrA

 

TeT K

 

6

ST45

CC45

HCP

CIP - GEN

E134N, L135T

 

S144P

K401E

 

aac(6´)-aph(2")

  

7

ST22

CC22

Hospital del Mar

CIP - ERY - DA

S84L, T129K

Y500T, H501T

S144P, G78A, E84R

 

ermC

   

8

ST22

CC22

Hospital del Mar

CIP - ERY

S84L, S85P, T129I

V511A, V303C

S144P, S81P

 

ermC

   

9

ST8

CC5

Hospital del Mar

CIP - ERY - GEN - TET

S84L, T129K, I131S

 

S144P

K401E

msrA

aac(6´)-aph(2")

TeT K

 

10

ST22

CC22

Hospital del Mar

CIP

S84L, S85P

V511A, R447H

S144P

K401R, L440F

    

11

ST22

CC22

Hospital del Mar

CIP - GEN - TET

S84L, K130G

V511A, G339D, K312T

S144P

K401E, K400Q, D507E

 

aac(6´)-aph(2")

TeT K

 

12

ST22

CC22

Policlinic Milan

CIP - ERY

S84L, T129K

 

S144P

K401R

ermC

   

13

ST1535

-

Policlinic Milan

CIP - GEN - TET - FA

 

R447L

S144P

K403Q, H478Y, D507E

aac(6´)-aph(2")

TeT K

FusB

14

ST22

CC22

Policlinic Milan

CIP - ERY

S84L, T129I

H501T

S144P, S80F

 

ermC

   

15

ST83

CC5

Policlinic Milan

CIP - ERY

S84L

H501T

S144P

 

ermC

   

16

ST217

CC22

Policlinic Milan

CIP - ERY - GEN - DA

S84L

L418F

S144P

K401E

ermA

aac(6´)-aph(2")

  

17

ST403

CC5

Policlinic Milan

CIP

T129K

V511A, S425G, R447N

S144P

D503E, A504P

    

18

ST1221

CC5

Policlinic Milan

CIP - ERY

S84L, E88A

 

S144P, S80F

K401E, D507N

ermC

   

19

ST22

CC22

Policlinic Milan

CIP - ERY - GEN - DA

S84L

 

S144P

K403Q, A504P, D507E

ermA

aac(6´)-aph(2")

  
  1. * ETT collected at different ICU. ETT code 3, 5, and 6 = Methicillin sensitive Staphylococcus aureus
  2. Abbreviations: CC Clonal Complex, CIP Ciprofloxacin, DA Clindamycin, ERY Erythromycin, FA Fusidic acid, GEN Gentamicin, HCP Hospital Clinic (Spain), HUCA Hospital Universitario Central de Asturias (Spain); Policlinic Milan, Fondazione IRCCS Ca′ Granda (Italy), QRDR Quinolone Resistance-Determining Region, ST sequence type; Strain 20, susceptible to all antimicrobial agents tested (ST217, CC22), TET Tetracycline