Susceptibility of the domestic duck (Anas platyrhynchos) to experimental infection with Toxoplasma gondii oocysts

Figures & data

Table 1. Dynamics of antibody production as measured by indirect fluorescence antibody test in the ducks experimentally inoculated with T. gondii oocysts

		Antibody titres
Bird numbers	Dose of oocysts	7 d.p.i.^a	14 d.p.i.	21 d.p.i.	28 d.p.i.
1 to 4	10^1	1:20±0	1:2880±1395	1:2240±1663	1:2080±831
5 to 8	10^2	1:35±26	1:3540±3966	1:2740±2388	1:2100±1971
9 to 12	10^3	1:200±69	1:1920±640	1:1600±554	1:3200±1920
13 to 16	10^4	1:240±80	1:10 880±6368	1:2560±0	1:3200±1109
17 to 20	10^5	1:480±160	1:8320±3326	1:2560±0	1:2560±0
21 to 24	5×10^5	1:560±139	1:11 520±8960	1:2080±831	1:1920±640
^a d.p.i., day post-inoculation.

Table 2. Results of bioassay of organs of experimentally inoculated ducks killed on day 28 p.i.

Dose of oocysts	Muscles	Heart	Brain	Liver	Stomach
10^1	4/4^a	3/3	3/4	0/1	1/4
10^2	4/4	4/4	4/4	1/4	3/4
10^3	4/4	4/4	3/3	2/3	1/4
10^4	4/4	4/4	4/4	1/2	2/4
10^5	4/4	4/4	3/3	1/1	2/4
10^5.7	4/4	4/4	3/4	2/2	2/4
Total	24/24	23/23	20/22	7/13	11/24
^a Data presented as the ratio of the number of positive birds/number of totally tested birds.