An Exploratory Descriptive Study of Antimicrobial Resistance Patterns of Staphylococcus Spp. Isolated from Horses Presented at a Veterinary Teaching Hospital

Table 3 Distribution of antimicrobial resistance by species of Staphylococcus and antimicrobial agent

	Resistant Isolates		MDR Isolates
	%	95% CI	%	95% CI
Species		n = 123		n = 35
S. aureus	72.5	58.3, 83.3^a	52.9	38.5, 67.1^a
S. pseudintermedius	38.9	19.2, 63.0^b	16.7	3.6, 41.4^b
S. spp ¹	30.4	18.7, 45.4^b	2.2	0.1, 11.5^c
All other species²	75.0	34.9, 96.8^a	50.0	15.7, 84.3^a
Antimicrobial & Antimicrobial Class		n = 64		n = 35
Aminoglycosides³
Gentamycin	54.6	42.1, 66.7^a	48.9	38.1, 59.8
Amikacin	14.1	7.3, 25.2^e	9.1	4.0, 17.1
Β-lactams⁴
Ampicillin	84.5	72.3, 91.9^b	37.5	27.4, 48.5
Penicillin	74.1	61.0, 84.0^b	37.5	27.4, 48.5
Ceftriaxone	44.8	32.3, 58.1^c	30.0	20.3, 41.3
Fluoroquinolones⁵
Enrofloxacin	23.4	14.5, 35.7^c	18.8	10.1, 30.5^b
Folate Pathway Inhibitors⁶
Trimotherim-sulfamethoxazole	60.9	48.2, 72.3^a	53.1	40.2, 65.7^a
Tetracyclines⁷
Doxycyline	46.9	34.8, 59.4^a,d	35.9	24.3, 48.9^c
Phenicols
Chloramphenicol	44.1	31.7, 57.2^d	31.3	20.2, 44.1^c

¹Samples that were not identified to species level and were thus reported as Staphylococcus spp.
²Other species included S. equinus, S. chromogens and S. epidermidis
³Gentamycin and amikacin
⁴Penicillin, ampicillin, ceftriaxone
⁵Enrofloxacin
⁶Sulphamethoxazole
⁷Chloramphenicol
^a-dEstimates with different superscripts are significantly different at 5% significance level

ISSN: 1746-6148