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Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 2 Variety of pathogens isolated from patients with monomicrobial and polymicrobial PJI

From: Failure of the first step of two-stage revision due to polymicrobial prosthetic joint infection of the hip

Pathogens

Monomicrobial infection n (%)

Polymicrobial infection n (%)

p value

All Gram-positive

116 (85.9)

101 (74.3)

0.02

 S. aureus/MRSA

71/6* (52.5/8.5*)

34/7* (25/20.6*)

<0.01/0.11

 S. epidermidis/MRSE

37/9** (20.1/24.3**)

38/12** (27.9/31.6**)

0.15/1.0

 Other CNS

4 (3.0)

9 (6.6)

1.0

 Enterococcus sp.

6 (4.4)

11 (8.1)

1.0

 Streptoccus spp.

4 (3.0)

6 (4.4)

1.0

 Propionibacterium acnes

2 (1.5)

6 (4.4)

0.71

 Corynebacterium spp

2 (1.5)

3 (2.2)

1.0

 Other Gram-positive

4 (3.0)

3 (2.2)

0.41

All Gram-negative

19 (14.1)

35 (25.7)

0.02

 Enterobacteriaceae

7 (5.1)

13 (9.6)

0.16

 Escherichia coli

3 (2.2)

6 (4.4)

0.31

 Klebsiella pneumoniae

1 (0.7)

2 (1.5)

0.6

 Klebsiella pneumoniae (ESBLs)

1 (0.7)

3 (2.2)

0.35

 Enterobacter cloacae

2 (1.5)

2 (1.5)

1.0

 Serratia marcescens

2 (1.5)

1 (0.7)

1.0

 Providencia sp.

0

1 (0.7)

0.47

 Aeromonas sp.

0

1 (0.7)

0.47

 Alcaligenes sp.

0

1 (0.7)

0.47

 Acinetobacter sp.

3 (2.2)

10 (7.4)

0.045

 Pseudomonas aeruginosa

5 (3.7)

7 (5.1)

0.56

 Stenotrophomonas

1 (0.7)

1 (0.7)

1.0

 Actinobacillus

1 (0.7)

0

1.0

 Candida sp.

0

1 (0.7)

0.47

Total

135

136

 
  1. Values are presented as the number of isolates. Data were analyzed with Fisher’s exact test
  2. * Number (%) of all S. aureus in the group; ** number (%) of all S. epidermidis in the group