TY - JOUR

T1 - Rift Valley Fever – assessment of effectiveness of surveillance and control measures in the EU

AU - EFSA Panel on Animal Health and Welfare, null

AU - Nielsen, Søren Saxmose

AU - Alvarez, Julio

AU - Bicout, Dominique Joseph

AU - Calistri, Paolo

AU - Depner, Klaus

AU - Drewe, Julian Ashley

AU - Garin-Bastuji, Bruno

AU - Gonzales Rojas, José Luis

AU - Gortázar Schmidt, Christian

AU - Herskin, Mette

AU - Michel, Virginie

AU - Miranda Chueca, Miguel Ángel

AU - Pasquali, Paolo

AU - Roberts, Helen Clare

AU - Sihvonen, Liisa Helena

AU - Stahl, Karl

AU - Calvo, Antonio Velarde

AU - Viltrop, Arvo

AU - Winckler, Christoph

AU - Gubbins, Simon

AU - Antoniou, Sotiria-Eleni

AU - Broglia, Alessandro

AU - Abrahantes, Josè Cortiñas

AU - Dhollander, Sofie

AU - Van der Stede, Yves

PY - 2020/11

Y1 - 2020/11

N2 - Effectiveness of surveillance and control measures against Rift Valley Fever (RVF) in Mayotte (overseas France) and in continental EU were assessed using mathematical models. Surveillance for early detection of RVF virus circulation implies very low design prevalence values and thus sampling a high number of animals, so feasibility issues may rise. Passive surveillance based on notified abortions in ruminants is key for early warning and at present the only feasible surveillance option. The assessment of vaccination and culling against RVF in Mayotte suggests that vaccination is more effective when quickly implemented throughout the population, e.g. at a rate of 200 or 2,000 animals vaccinated per day. Test and cull is not an option for RVF control in Mayotte given the high number of animals that would need to be tested. If the risk of RVFV introduction into the continental EU increases, ruminant establishments close to possible points of disease incursion should be included in the surveillance. An enhanced surveillance on reproductive disorders should be applied during summer in risk areas. Serosurveillance targets of 0.3 as an example. Culling animals on farms within a 20 km radius of detected farms appears as the most effective measure to control RVF spread, although too many animals should be culled. Alternative measures are vaccination in a 50 km radius around detection, ring vaccination between 20 and 50 km and culling of detected farms. The assessment of zoning showed that, following RVFV introduction and considering an R0 = 2, a mean vector dispersal of 10 km and 10 farms initially detected, RVFV would spread beyond a radius of up to 100 km or 50 km from the infected area with 105 respectively.

AB - Effectiveness of surveillance and control measures against Rift Valley Fever (RVF) in Mayotte (overseas France) and in continental EU were assessed using mathematical models. Surveillance for early detection of RVF virus circulation implies very low design prevalence values and thus sampling a high number of animals, so feasibility issues may rise. Passive surveillance based on notified abortions in ruminants is key for early warning and at present the only feasible surveillance option. The assessment of vaccination and culling against RVF in Mayotte suggests that vaccination is more effective when quickly implemented throughout the population, e.g. at a rate of 200 or 2,000 animals vaccinated per day. Test and cull is not an option for RVF control in Mayotte given the high number of animals that would need to be tested. If the risk of RVFV introduction into the continental EU increases, ruminant establishments close to possible points of disease incursion should be included in the surveillance. An enhanced surveillance on reproductive disorders should be applied during summer in risk areas. Serosurveillance targets of 0.3 as an example. Culling animals on farms within a 20 km radius of detected farms appears as the most effective measure to control RVF spread, although too many animals should be culled. Alternative measures are vaccination in a 50 km radius around detection, ring vaccination between 20 and 50 km and culling of detected farms. The assessment of zoning showed that, following RVFV introduction and considering an R0 = 2, a mean vector dispersal of 10 km and 10 farms initially detected, RVFV would spread beyond a radius of up to 100 km or 50 km from the infected area with 105 respectively.

KW - Rift Valley Fever

KW - Mayotte

KW - EU

KW - control

KW - surveillance

KW - vaccination

KW - vectors

KW - ruminants

U2 - 10.2903/j.efsa.2020.6292

DO - 10.2903/j.efsa.2020.6292

M3 - Journal article

C2 - 33193869

VL - 18

SP - 1

EP - 75

JO - E F S A Journal

JF - E F S A Journal

SN - 1831-4732

IS - 11

M1 - e06292

ER -