Semiquantitative Risk Evaluation Reveals Drivers of African Swine Fever Virus Transmission in Smallholder Pig Farms and Gaps in Biosecurity, Tanzania

Table 1

Districts and regions reporting outbreaks and covered during the field investigation and selected district-level statistics related to animal health officials.

Region	District reporting ASF	No. of wards	Staffing (involved in animal health issues)			Population at risk (pig)	Deaths reported due to ASF	Mortality rate (%)
			District office	Ward	Others (ward and village level)
			(DVO/LO/LFO)	LFO	EO, AO, WEO, VEO
Shinyanga	Kahama	20	1	9	NA	9,328	1820	19.5
Geita	Geita TC	13	2	6	NA	1,328	238	18.0
	Geita DC	37	5	11	NA	564	54	9.6
	Mbogwe	17	1	3	NA	1,567	388	24.7
Mwanza	Segerema	26	1	9	NA	2,591	444	17.1
Kagera	Ngara DC	22	1	12	NA	4,056	400	9.9
	Muleba DC	43	1	19	NA	4,233	105	2.5
Dodoma	Chamwino DC	36	5	17	4	6,120	1214	19.8
	Dodoma Jiji	41	6	30	3	3,161	141	4.5
Total		255	23	116	7	32,948	4,804	14.6

Note. DVOs and FGDs, March 2020; DVO = district veterinary officer; LO = livestock officer; LFO = livestock field officer; EO = extension officer; AO = agricultural officer; WEO = ward executive officer; VEO = village executive officer; TC = town council; DC = district council; NA = not available. All samples collected during the field exercise were confirmed using the partial amplification of major structural protein VP72 gene of ASF virus (ASFV). In total, 12 districts have reported outbreaks as at the time of field investigation.