Table 2.

Distal airway resistance (R_dist) and proximal airway resistance (R_prox) in pigs exposed to PRRSV (n = 8) and controls (n = 8).

	Day	Control		PRRSV
		Median	Range min; max	Median	Range min; max
Rdist in kPa/(L/s)	a.i.	0.334	0.256; 0.456	0.434	0.311; 0.550
	2	0.300	0.250; 0.500	0.471	0.250; 0.617
	4	0.342	0.250; 0.400	0.558#	0.233; 0.617
	6	0.292	0.250; 0.550	0.425	0.250; 0.550
	9	0.350	0.283; 0.417	0.517#	0.333; 0.750
	12	0.275	0.250; 0.400	0.600#	0.417; 0.717
	15	0.334	0.250; 0.483	0.592#	0.283; 0.733
	18	0.284	0.250; 0.383	0.517#	0.400; 0.717
Rprox in kPa/(L/s)	a.i.	0.367	0.279; 0.374	0.336	0.316; 0.368
	2	0.365	0.271; 0.436	0.327	0.259; 0.421
	4	0.366	0.211; 0.415	0.345	0.288; 0.407
	6	0.383	0.266; 0.460	0.329#	0.298; 0.371
	9	0.388	0.308; 0.523	0.385	0.255; 0.449
	12	0.431	0.389; 0.459	0.353#	0.275; 0.447
	15	0.482	0.335; 0.523	0.363#	0.289; 0.436
	18	0.517	0.399; 0.588	0.361#	0.306; 0.387

a.i. Represents data measured prior to inoculation with PRRSV (averaged per pig).

^#Indicates significant difference between pigs exposed to PRRSV and controls (W-test, P ⩽ 0.05).