Effects of a water-soluble formulation of tylvalosin on disease caused by porcine reproductive and respiratory syndrome virus alone in sows or in combination with Mycoplasma hyopneumoniae in piglets

Table 4 Piglet performance and clinical scores in the dual challenge study in piglets. All piglets were challenged with M. hyopneumoniae on days 0, 1 and 3 and with PRRSV on day 14. Pigs in treated-challenged group were medicated daily with tylvalosin at 20 mg/kg body weight from day 10 to day 20. Treatement description is in Table 5

Group	Number of pigs on day 0	Mortality count	Body weights (BW) mean ± SD in kg			Feed conversion ratio Day 14-Day 24^*
Group	Number of pigs on day 0	Mortality count	BW Day 0	BW Day 24	BW gain Day 0-DAy 24	Feed conversion ratio Day 14-Day 24^*
Treated- challenged	8	1 (day 22)^a	9.39 ± 1.77	16.35 ± 3.19	7.1 ± 2.0	1.85
Untreated-challenged	8	1 (day 21)^b	8.94 ± 1.37	14.83 ± 3.22	6.1 ± 2.7	2.62
P-value		Not compared	Not compared		P = 0.387	Not compared

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