Prevalence and antimicrobial resistance profile of Staphylococcus in dairy farms, abattoir and humans in Addis Ababa, Ethiopia

Table 1 Differential tests used for identification of Staphylococcus species and their reactions

Staphylococcus species	Hemolysis	Pigment production	Gram stain	Coagulase test	Catalase test	OF test	Fermentation of sugar		Susceptibility to polymyxin B (300 unit)
Staphylococcus species	Hemolysis	Pigment production	Gram stain	Coagulase test	Catalase test	OF test	MSA	PAB	Susceptibility to polymyxin B (300 unit)
S. aureus	+	+	+	+	+	F	+	+	R
S. intermidius	+	–	+	+	+	F	±	±	S
S. hyicus	–	–	+	+	+	F	–	–	R
CNS	–	–	+	–	+	F	–	–	NP

+, 90% or more strains are positive; ±, 90% or more strains are weakly positive; −, 90% or more strains are negative
CNS coagulase negative staphylococcus, F fermentative, OF oxidation–fermentation, MSA mannitol salt agar, PAB Purple agar base, R resistant, S susceptible, NP not performed

ISSN: 1756-0500