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. Author manuscript; available in PMC: 2016 Apr 15.

Published in final edited form as: Vet Parasitol. 2015 Feb 7;209(0):1–42. doi: 10.1016/j.vetpar.2015.01.026

Table 3.

Factors associated with Sarcocystis infections in opossums in the USA.

Risk factor		Percentage of positive (n)
Risk factor		Mississippi (Rickard et al., 2001)	Michigan (Elsheikha et al., 2004b,d)	California (Rejmanek et al., 2010)
Age	Adult	28 (14/50)	14.5 (30/206)	6.7 (14/206)
Age	Juvenile	22.7 (5/22)	3.3 (7/206)	3.7 (3/81)
Gender	Female	29.4 (10/34)	9.7 (20/206)	4.4 (6/136)
Gender	Male	23.6 (9/38)	8.25 (17/206)	7.5 (11/146)
Female with pouch young	Present	33.3 (6/18)	no data	8.3 (2/24)
Female with pouch young	Absent	25 (4/16)	no data	5.2 (4/76)
Season	Spring	34.2 (13/38)	3.3 (7/206)	9.1 (14/154)
	Summer	no data	9.2 (19/206)	9.1 (14/154)
	Autumn	no data	3.3 (7/206)	2.2 (3/133)
	Winter	17.6 (6/34)	1.9 (4/206)	2.2 (3/133)
Total number tested		72	206	288
Total positive (%)		26.3 (19)	17.9 (37)	5.9 (17)