Pathobiological analysis of African swine fever virus contact-exposed pigs and estimation of the basic reproduction number of the virus in Vietnam

Table 2 Presence of major gross pathological lesions in experimental pigs

Major gross lesions	Pig no.^* (death period)
Major gross lesions	#1 (6 dpi)	#3 (22 dpi)	#5 (12 dpi)	#7 (19 dpi)	#10 (Survive)	#15 (NC)
Congestive splenomegaly	+++	+++	+++	+++	+	-
Haemorrhagic enlargement of submandibular LN	+++	+++	++	++	-	-
Haemorrhagic enlargement of mesenteric LN	+++	+++	++	+++	-	-
Hyperaemia of tonsil	+	-	-	+	-	-
Hyperaemia of lung	+	+++	-	+++		-
Petechiae or haemorrhages in the liver	+	+	-	++	-	-
Petechiae or haemorrhages in the kidney	+++	+++	+	++	+	-
Petechiae or haemorrhages in the intestine	+++	++	+	-	-	-
Petechiae or haemorrhages in the heart	-	+++	++	+	-	-
Abdomen exudative fluid	+	++	+	++	-	-
Skin erythema	+	-	++	-	-	-

^*Pig no. #1, ASFV-inoculated pig; pig nos. #2, #3, #5, #7, and #10, within-pen direct contact pigs; pig no. #15, negative control pig. LN: lymph node, NC: negative control, -: no lesion, +: mild, ++: moderate, +++: severe

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