Trichuris spp. infecting domestic cats on St. Kitts: identification based on size or vulvar structure?

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Table 1 Morphological descriptions of Trichuris campanula and Trichuris serrata

	*T. campanula*			*T. serrata*			St. Kitts
	von Linstow ( 1889 )	Ng and Kelly ( 1975 )	Clarkson and Owen ( 1960 )	von Linstow ( 1879 )	Kelly ( 1973 )	Cameron ( 1937 )	St. Kitts
Female	31.5	38	22.5	48	49.5	14.74	25
Length (mm)	23.0^*	38	22.5	48	49.5	14.74	(14–31)
Vulva	2 not very prominent lips	Straight; 2 inconspicuous longitudinal lips	Prominent spiny structure directed posteriorly	Spiny structure directed posteriorly	Appendage on posterior lip directed posteriorly	Appendage on posterior lip directed posteriorly	Appendage on posterior lip directed posteriorly
Eggs (μm)	72 x 36	81-85 x 35-39	63 x 34	56 x 39	54 x 40	60 x 35	60-75 x 30–40 (38 eggs)
Eggs (μm)	80 x 36^*	81-85 x 35-39	63 x 34	56 x 39	54 x 40	60 x 35	60-75 x 30–40 (38 eggs)
Male	20.5^*	36	21.5	40	38	12.75	24 (17–32)
Length (mm)	20.5^*	36	21.5	40	38	12.75	24 (17–32)
Spicule	1.5^*	2.9	1.5	3.9	3.6	1.2	1.4
(mm)	1.5^*	2.9	1.5	3.9	3.6	1.2	(1.1-1.5)
Other	--	No bacillary band	--	Bacillary band	Bacillary band	Bacillary band	Bacillary band
Source	Domestic cat	Domestic cat	Domestic cat	Domestic cat	Domestic cat	Ocelot	Domestic cat
Source	Brazil	Australia	Bahamas	Brazil	Australia	Trinidad	Domestic cat
Worms used	1 female	<36 total	11 females	Unknown	6 females	3 females	22 females
	1 partial male		6 males		13 males	2 males	12 males
	Unknown^*		6 males		13 males	2 males	9 cats for eggs

^*From Urioste 1923 as described by Clarkson and Owen (1960) and Ng and Kelly (1975).