Incidence, risk factors and prediction of post-operative acute kidney injury following cardiac surgery for active infective endocarditis: an observational study

Table 2 Microbiology

	All patients (n = 202)	No post-operative AKI (n = 82)	Post-operative AKI (n = 120)	P-value
*Streptococci*	84 (41.6)	40 (48.8)	44 (36.7)	0.40
Streptococcus bovis/gallolyticus	14 (6.9)	5 (6.1)	9 (7.5)	NA
Oral streptococci	36 (17.8)	19 (23.2)	17 (14.2)	NA
Pyogenic streptococci^a	15 (7.4)	8 (9.8)	7 (5.8)	NA
Others Streptococcaceae^b	19 (9.4)	8 (9.8)	11 (9.2)	NA
*Staphylococci*	56 (27.8)	14 (17.1)	42 (35.0)	0.008
Staphylococcus aureus	38 (18.8)	9 (11.0)	29 (24.2)	0.03
Coagulase-negative staphylococci	18 (8.9)	5 (6.1)	13 (10.8)	0.16
*Enterococcus faecalis*	18 (8.9)	6 (7.3)	12 (10.0)	0.68
HACEK group	10 (4.9)	6 (7.3)	4 (3.3)	0.66
*Bartonella* species	10 (4.9)	6 (7.3)	4 (3.3)	0.34
*Coxiella burnetii*	3 (1.5)	1 (1.2)	2 (1.7)	0.99
Others microorganisms ^c	18 (8.9)	9 (11.0)	9 (7.5)	0.55
Negative culture bacteria ^d	3 (1.5)	0 (0)	3 (2.5)	0.39

^aBeta-hemolytic streptococci (group A,B,C and G); ^bOthers streptococci: Streptococcus pneumoniae (n = 6), Peptostreptocccus (n = 2), Abiotrophia defectiva (n = 1), Gemella species (n = 3), Streptococcus acidominimus (n = 1), Streptococcus anginosus (n = 1), Streptococcus deficiens (n = 1), Streptococcus spp (n = 4); ^cOthers micororganisms: Serratia marcescens (n = 1), Klebsiella pneumoniae (n = 1), Proprionobacterium species (n = 5), Candida species (n = 1), Aspergillus species (n = 1), Campylobacter species (n = 1); others (n = 8); ^dFor the three patients with negative cultures, the direct examination revealed Gram-positive Cocci; HACEK, Haemophilus sp, Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, Kingella kingae; NA, not applicable .

ISSN: 1364-8535