Table 2.

Influence of certain risk factors on seroprevalence of spotted fever group in cattle

Risk factor	Group	No. positive	No. negative	Percentage positive	P
Season	Summer†	16	9	64.0	0.027 *
	Winter‡	109	60	64.5
Age (years)	<3	26	11	70.3	0.121
	3–6	38	27	58.5
	6.1–9	41	27	60.3
	>9	20	4	83.3
Location	Khartoum	38	23	62.3	0.13
	Omdurman	44	15	74.6
	Khartoum North	43	31	58.1
Sex	Male	16	7	69.6	0.58
	Female	109	62	63.7
Management	Intensive	105	48	68.6	0.02 *
	Semi‐intensive	20	21	48.8

*P < 0.05. ^†March–June. ^‡November–February.