The effect of urine storage temperature and boric acid preservation on quantitative bacterial culture for diagnosing canine urinary tract infection

Table 2 Colony forming units (CFU)/mL rounded down to the nearest whole logarithmic number for 16 samples with discrepant counts resulting in altered conclusion regarding significant bacteriuria

	Reference		COOL 24 h		COOL 48 h		ROOM 24 h		ROOM 48 h
Collection method	CFU/mL	UTI	CFU/mL	UTI	CFU/mL	UTI	CFU/mL	UTI	CFU/mL	UTI
Cystocentesis	Sterile	No	Sterile	No	10⁵	Yes^a	Sterile	No	Sterile	No
	Sterile	No	10³	Yes^a	Sterile	No	Sterile	No	10⁵	No
	Sterile	No	10³	Yes^a	10⁵	No	10²	No	Sterile	No
	10²	No	Sterile	No	10³	Yes^a	Sterile	No	Sterile	No
	10⁴	Yes	10⁴	Yes	10⁵	Yes	10⁴	Yes	10²	No^b
	10⁵	Yes	10⁴	Yes	10³	Yes	10³	Yes	10	No^b
	10⁵	Yes	10⁵	Yes	10²	No^b	10⁵	Yes	Sterile	No^b
Catheter	Sterile	No	Sterile	No	10⁴	No	10⁵	Yes^a	10⁵	Yes^a
Voided	10⁴	No	10⁵	Yes^a	10⁵	Yes^a	10⁴	No	10⁵	Yes^a
	10⁴	No	10⁵	Yes^a	10⁴	No	10⁴	No	10⁴	No
	10⁵	Yes	10⁴	No^b	10⁵	Yes	10⁴	No^b	10⁴	No^b
	10⁵	Yes	10⁵	Yes	10⁴	No^b	10⁴	No^b	10³	No^b
	10⁵	Yes	10⁴	No^b	10⁵	Yes	10⁵	Yes	10⁵	Yes
	10⁵	Yes	10⁵	Yes	10⁴	No^b	10⁵	Yes	10⁴	No^b
	10⁵	Yes	10⁵	Yes	10⁵	Yes	10⁴	No^b	10⁴	No^b
	10⁵	Yes	10⁵	Yes	10⁵	Yes	10⁵	Yes	10⁴	No^b

^aFalse positive results compared to reference, ^bFalse negative results compared to reference
COOL Urine stored refrigerated, ROOM Urine stored in boric acid (UriSwab™) at room temperature
Colony forming units (CFU)/mL rounded down to the nearest whole logarithmic number for 16 samples with discrepant counts resulting in altered conclusion regarding significant bacteriuria

ISSN: 1746-6148