Table 3.
Details of 23 ACME arc-positive MRSA isolates
MRSA description/source | Isolate no. | Yr of isolation | Isolate source | Antimicrobial resistance patterna | ST | SCCmec type | spa type | dru type | PFT | DNA microarray groupc |
---|---|---|---|---|---|---|---|---|---|---|
PVL locus positive | ML224 | 2003 | Skin abscess | AMP, CAD, CIP, ERY, KAN, NEO | 8 | IVa | t008 | dt9g | 99023 | ST8-MRSA-IV (a) |
M05/0199 | 2005 | Pneumonia (USA travel) | AMP, CIP, ERY, KAN, NEO | 8 | IVa | t008 | dt9g | 99025 | ST8-MRSA-IV (a) | |
M05/0259 | 2005 | Face infection | AMP, ERY, KAN, NEO | 8 | IVa | t008 | dt9g | 99023 | ST8-MRSA-IV (a) | |
M05/0028 | 2005 | Buttock abscess | AMI, AMP, ERY, KAN, NEO | 8 | IVa | t008 | dt9g | 99023 | ST8-MRSA-IV (a) | |
M04/0266 | 2005 | Inguinal lymphadenitis | AMI, AMP, ERY, KAN, NEO | 8 | IVa | t4306 | dt9g | 99017 | ST8-MRSA-IV (a) | |
M05/0060 | 2005 | Skin scalp abscess | AMI, AMP, CHL, ERY, KAN, LIN, NEO | 8 | IVa | t008 | dt9g | 99024 | ST8-MRSA-IV (b) | |
M05/0100 | 2005 | Staff screening | AMP, CIP, ERY | 8 | IVa | t008 | dt9z | 99023 | ST8-MRSA-IV (c) | |
E1401 | 2003 | Blood/bacteremia | AMP, ERY | 22 | IVa | t2480 | dt10am | 01003 | ST22-MRSA-IV (a) | |
Four-ward study | M08/0119 | 2008 | Nasal | AMP, CAD, CIP, ERY, KAN, LIN, MUP, TOB | 22 | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) |
M08/0121 | 2008 | Air | AMP, CAD, CIP, ERY, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0122 | 2008 | Air | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0123 | 2008 | Air | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0124 | 2008 | Air | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0126 | 2008 | Mattress | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0129 | 2008 | Bathroom floor | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0131 | 2008 | Air | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0132 | 2008 | Air | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0133 | 2008 | Air | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0135 | 2008 | Mattress | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0161 | 2008 | Bathroom floor | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (b) | |
M08/0128 | 2008 | Air | AMP, CAD, CIP, ERY, GEN, KAN, LIN, MUP, TOB | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (c) | |
M08/0134 | 2008 | Air | AMP, CAD, CIP, ERY | 22 | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (d) | |
M08/0136 | 2008 | Mattress | AMP, CAD, CIP, ERY | 22b | IVh | t3185 | dt10o | 01154 | ST22-MRSA-IV (d) |
Antimicrobials tested included amikacin (AMI), ampicillin (AMP), cadmium acetate (CAD), chloramphenicol (CHL), ciprofloxacin (CIP), erythromycin (ERY), ethidium bromide, fusidic acid, gentamicin (GEN), kanamycin (KAN), lincomycin (LIN), mercuric chloride, mupirocin (MUP), neomycin (NEO), phenyl mercuric acetate, rifampin, spectinomycin (SPC), streptomycin, sulfonamide, tetracycline, tobramycin (TOB), trimethoprim, and vancomycin.
ST assigned by DNA microarray analysis using the StaphyType kit (Alere Technologies). Other STs were also determined by MLST.
Isolates within each ST-SCCmec type (ST8-MRSA-IV or ST22-MRSA-IV) were assigned to DNA microarray groups on the basis of the presence of a unique combination of virulence and/or antimicrobial resistance genes. DNA microarray results are shown in Table 4.