Structural equation models to estimate risk of infection and tolerance to bovine mastitis

Table 1 Growth characteristics of the major and minor mammary gland pathogens ^*

Properties^**	1	2	3	4	5	6	7	8	9	10	11
Staphylococci	+	Cocci	+	-	+	β, -	-	NR^***	+	-	NR
Streptococci	+	Cocci	-	-	+	α, β, -	-	NR	-	+	+, -
Enterococci	+	Cocci	-	-	+	α	-	NR	-	+	+
Enterobacteria	-	Short rods	+	-	+	α, β, -	+	+^****, -	-	-	NR
Pseudomonads	-	Short rods	+	+	+	β^*****, -	+	-	-	-	NR
Corynebacteria	+	Short rods	+, -	-	+	β, -	-	NR	-	-	NR
Bacilli	+	Long rods	+	-	+	β, -	-	NR	+, -	-	NR

^*Presence of strict anaerobes and mycoplasmas was not assessed; ^**properties are 1 = Gram staining, 2 = morphology, 3 = catalase production, 4 = peroxidase production, 5 = growth on Columbia blood agar, 6 = haemolysis on Columbia blood agar, 7 = growth on Gassner agar, 8 = lactose fermentation on Gassner agar, 9 = growth on Chapman agar, 10 = growth on Edwards medium, 11 = esculin hydrolysis on Edwards agar; ^***NR = not relevant; ^****also named coliforms: lactose-fermenting species of Escherichia, Klebsiella, Enterobacter genders; ^*****due to the production of pigments the haemolysis zone can appear green to blue-green.

ISSN: 1297-9686