Lumbar methicillin-resistant Staphylococcus aureus infection caused by a peripherally inserted central catheter: A case report

Table 1 Blood and catheter bacterial culture + drug sensitivity

Sample type	Project application	Result	Antibacterial drugs	Sensitivity	KB (mm), MIC (mg/L)	Cut off point R	Cut off point S
Blood	Bacterial culture + drug sensitivity	Staphylococcus aureus (+); MRSA (+)	Penicillin G	R	≥ 0.5	≥ 0.25	≤ 0.12
			Ciprofloxacin	S	1	≥ 4	≤ 1
			Moxifloxacin	S	≤ 0.25	≥ 2	≤ 0.5
			Gentamicin	S	≤ 0.5	≥ 16	≤ 4
			Clindamycin	R	≥ 8	≥ 4	≤ 0.5
			Compound sulfamethoxazole	S	≤ 10	≥ 76	≤ 38
			Linezolid	S	2	≥ 8	≤ 4
			Benzylpenicillin	R	≥ 4	≥ 4	≤ 2
			Levofloxacin	S	0.5	≥ 4	≤ 1
			Vancomycin	S	1	≥ 16	≤ 2
			Erythromycin	R	≥ 8	≥ 8	≤ 0.5
			Tetracycline	S	≤ 1	≥ 16	≤ 4
			Tigecycline	S	≤ 0.12	-	-
			Rifampicin	S	≤ 0.5	≥ 4	≤ 1
Catheter	Bacterial culture + drug sensitivity	Staphylococcus aureus (+++); MRSA (+)	Penicillin G	R	≥ 0.5	≥ 0.25	≤ 0.12
			Ciprofloxacin	I	2	≥ 4	≤ 1
			Moxifloxacin	S	≤ 0.25	≥ 2	≤ 0.5
			Gentamicin	S	≤ 0.5	≥ 16	≤ 4
			Clindamycin	R	≥ 8	≥ 4	≤ 0.5
			Compound sulfamethoxazole	S	≤ 10	≥ 76	≤ 38
			Linezolid	S	2	≥ 8	≤ 4
			Quinupristin/dalfop ristin	S	≤ 0.25	≥ 4	≤ 1
			Benzylpenicillin	R	≥ 4	-	≤2
			Levofloxacin	S	1	≥ 4	≤ 1
			Vancomycin	S	1	≥ 16	≤ 2
			Erythromycin	R	≥ 8	≥ 8	≤ 0.5
			Tetracycline	S	≤ 1	≥ 16	≤ 4
			Tigecycline	S	≤ 0.12	-	-
			Rifampicin	S	≤ 0.5	≥ 4	≤ 1

KB: Kirby-Bauer (disk diffusion method); MIC: Minimum inhibitory concentration; MRSA: Methicillin-resistant Staphylococcus aureus; S: Sensitive; I: Intermediate; R: Resistant.

Table 2 Blood count, biochemistry, and C-reactive protein were monitored twice

Report date	Report item name	Result	Normal reference value
Blood count
During treatment	White blood cell count (109/L)	12.10	3.50-9.50
	Neutrophil (%)	77.5	40.0-75.0
	Lymphocyte (%)	11.6	20.0-50.0
	Monocyte (%)	10.7	3.0-10.0
	Eosinophil (%)	0.1	0.4-8.0
	Absolute neutrophil count (109/L)	9.38	1.80-6.30
	Absolute monocyte count (109/L)	1.30	0.10-0.60
	Absolute eosinophil count (109/L)	0.01	0.02-0.52
	Red blood cell count (1012/L)	2.94	3.80-5.10
	Hemoglobin level (g/L)	94	115-150
	Hematocrit (%)	26.7	35.0-45.0
After treatment	White blood cell count (109/L)	9.58	3.50-9.50
	Neutrophil (%)	85.6	40.0-75.0
	Lymphocyte (%)	8.8	20.0-50.0
	Eosinophil (%)	0.2	0.4-8.0
	Absolute neutrophil count (109/L)	8.20	1.80-6.30
	Absolute lymphocyte count (109/L)	0.84	1.10-3.20
	Red blood cell count (1012/L)	2.80	3.80-5.10
	Hemoglobin level (g/L)	90	115-150
	Hematocrit (%)	27.3	35.0-45.0
Biochemistry
Pre-treatment	Emergency K test (mmol/L)	4.49	3.6-5.0
	Emergency Na test (mmol/L)	134.8	137-145
	Emergency CI test (mmol/L)	97.7	98.0-107.0
	Emergency Ca test (mmol/L)	1.96	2.1-2.55
	Emergency CO2-CP test (mmol/L)	28	22.0-30.0
	Emergency blood glucose test (mmol/L)	7.30	3.6-5.8
	Emergency creatinine test (μmol/L)	58.10	20-110
	Emergency urea nitrogen test (mmol/L)	4.1	2.5-6.1
	Emergency aspartate aminotransferase test (U/L)	29	17-59
During treatment	Emergency UA test (μmol/L)	236	143-440
	Emergency K test (mmol/L)	4.64	3.5-5.5
	Emergency Na test (mmol/L)	135.4	135-150
	Emergency Cl test (mmol/L)	104.5	95-115
	Emergency Ca test (mmol/L)	2.16	2.08-2.60
	Emergency CO2-CP test (mmol/L)	24.6	21.0-31.0
	Emergency glucose test (mmol/L)	5.74	3.90-6.10
	Emergency creatinine test (μmol/L)	71	45-115
	Emergency urea nitrogen test (mmol/L)	5.0	2.6-8.3
	Emergency AG test (mmol/L)	10.94	6.00-22.00
	Emergency osmolality test (mmol/L)	285.8	280-320
	Emergency phosphorus test (mmol/L)	1.14	0.81-1.55
CRP
During treatment	CRP (mg/L)	63.20	0-8
After treatment	CRP (mg/L)	28.40	0-8

K: Potassium; Na: Sodium; CI: Chloride; Ca: Calcium; CO2-CP: Carbon dioxide combining power; UA: Uric acid; AG: Anion gap; CRP: C-reactive protein.

Table 3 Procalcitonin levels were monitored continuous

Report item name	Result	Normal reference value
PCT (ng/mL)	7.31	0-0.05
	1.29
	0.48
	0.23
	0.1
	0.07

PCT: Procalcitonin.