A study of Rift Valley fever virus in Morogoro and Arusha regions of Tanzania – serology and farmers’ perceptions

Figures & data

Table 1 Blood samples were collected from 478 individuals among 39 different herds in 15 villages

District	Herds n	Sheep n	Goat n	≥7 years n	Male n	Female n
Mvomero	12	83	94	27	41	135
Ngorongoro	14	66	87	3	51	101
Ulanga	13	87	61	1	33	115
Total	39	236	242	31	125	351

This table describes the distribution of species, sex, and also how many of the sampled individuals that were equal or older than 7 years. n=number of individuals.

Table 2 Distribution of the 354 samples analysed by the RVFV-ELISA

District	Sheep n	Goat n	Total analysed n	≥7 years n
Mvomero	57 (69%)	67 (71%)	124 (70%)	20 (74%)
Ngorongoro	41 (62%)	64 (74%)	105 (69%)	3 (100%)
Ulanga	70 (80%)	55 (90%)	125 (84%)	1 (100%)
Total analysed	168 (71%)	186 (77%)	354 (74%)	24 (77%)

The percentage shows the percentage of the sampled individuals that were analysed. n=number of individuals.

Table 3 The approximate number (n) and mean of animals in each herd

Study areas	Type of livestock
District	Sheep n (mean)	Goat n (mean)	Sheep+goat n (mean)	Cattle n (mean)
Mvomero			60–200 (130)	60–200 (130)
Ngorongoro	50–200 (150)	50–200 (125)		6–600 (303)
Ulanga			3–50 (26.5)	0–50 (25)

Table 4 Results from the first-step ELISA, 272 animals were analysed, and 22 animals were seropositive

District	Sheep % (n)	Goat % (n)	Total % (n)	≥7 years % (n)
Mvomero	4.7 (2)	18.4 (9)	12.0 (11)	6.7 (1)
Ngorongoro	2.5 (1)	–	1.1 (1)	–
Ulanga	12.0 (6)	9.8 (4)	10.9 (10)	–
Total (%)	6.7 (9)	9.4 (13)	8.1 (22)	6.7 (1)

n=number of individuals.

Table 5 Results from ELISA showing the total seroprevalence and number of positive animals

District	Sheep % (n)	Goat % (n)	Total % (n)	≥7 years % (n)
Mvomero	3.5 (2)	18.0 (12)	11.3 (14)	30.0 (6)
Ngorongoro	2.4 (1)	–	1.0 (1)	–
Ulanga	14.3 (10)	7.3 (4)	11.2 (14)	–
Total (%)	7.7 (13)	8.6 (16)	8.2 (29)	25.0 (6)

In total 354 individuals were analysed. n=number of individuals.