The Effectiveness of Anti-R. equi Hyperimmune Plasma against R. equi Challenge in Thoroughbred Arabian Foals of Mares Vaccinated with R. equi Vaccine

Table 4

Reisolation rate of R. equi from BALF samples (CFU/mL) and lung samples (CFU/gr) after necropsy in foals.

Foal group	Foal number	Day 0	Day 1	Day 10	Day 20	Day 30	Necropsy
Vaccine + HI plasma	1	0	65000	135	1400	140	50
	2	0	1000	55	1220	0	21000
	3	0	1300	120	12700	0	0
	4	0	2600	195	90000	170000	**
	Mean	0	17475	126	26330	42535
Control	5	0	19000	800	died	—	**
	6	0	4100	3600	1300000	1100000	320000
	7	0	5500	Died	—	—	**
	8	0	83000	640000	2300	100000	3250000
	Mean	0	27900	214666	651150	600000

∗∗Too many to count.