Bluetongue in the Sultanate of Oman, a preliminary epidemiological study

Taylor, W. P.; Busaidy, S. M. Al; Mellor, P. S.

doi:10.1017/s0950268800048718

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…The density of cattle in Cyprus was 3.5 head per km 2 , whereas in areas where persistence occurred the density was 21. Culicoides (1,52). The areas in the Southern Hemisphere where the viruses have persisted correspond better to the 18°C isotherm than to the 12.5°C isotherm.…”

Section: Discussionmentioning

confidence: 97%

Temperature and the persistence of viruses in culicoides spp. during adverse conditions

Sellers

Mellor²

1993

Rev. Sci. Tech. OIE

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The average daily maximum temperature for the coldest month during the winters of 1977-1978 and 1978-1979, when bluetongue (BT) virus overwintered in a cycle between Culicoides spp. and cattle in western Turkey (Aydin and Izmir provinces), was found to be 12.5°C. This temperature agreed with the lowest temperatures found for Culicoides activity and for flight over long distances. Overwintering of BT virus in western Turkey and Lesbos (1979-1980), African horse sickness (AHS) virus in Spain (1987-1990) and BT and epizootic haemorrhagic disease of deer (EHD) viruses in British Columbia (1987-1988) was assessed using the following conditions for survival: maximum temperatures >13°C on 45% of days or more, a weighted "degree day" value of >1.35 of 6 and an average daily maximum temperature of>12.5°C (all for the coldest month) together with a total of 40 days or fewer with maximum temperatures < 13°C and < 10 consecutive days with maximum temperatures <13°C. Using these criteria, overwintering is unlikely to have occurred in Culicoides in Lesbos, Madrid, Toledo, Ciudad Real or British Columbia, but could have taken place in western Turkey (Aydin and Izmir) and southern Spain (Guadalquivir, Guadiana and Tagus Valleys). Isotherms of average daily maximum temperatures of 12.5°C and 18°C for the coldest month were drawn on maps covering various regions of the world, to indicate areas where virus and Culicoides activity could continue during the winter and to compare these areas with the known distribution of BT, EHD, AHS and Akabane infection.

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Section: Discussionmentioning

confidence: 97%

Temperature and the persistence of viruses in culicoides spp. during adverse conditions

Sellers

Mellor²

1993

Rev. Sci. Tech. OIE

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Study of Akabane infection in Saudi Arabia by the use of sentinel ruminants

Elzein

Al-Afaleq

Mellor

et al. 1998

Journal of Comparative Pathology

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Updating the global occurrence of Culicoides imicola, a vector for emerging viral diseases

Leta

Fetene

Mulatu³

et al. 2019

Sci Data

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Culicoides imicola is the main vector transmitting viruses causing animal diseases such as Bluetongue, African Horse Sickness, and Schmallenberg. It has become widely distributed, with reports from South Africa to southern Europe, and from western Africa to southern China. This study presents a global compendium of Culicoides imicola occurrence between 1943 and 2018, reflecting the most recently compiled and harmonized global dataset derived from peer-reviewed literature. The procedures used in producing the data, as well as the geo-coding methods, database management and technical validation procedures are described. The study provides an updated and comprehensive global database of C. imicola occurrence, consisting of 1 039 geo-coded records from 50 countries. The datasets can be used for risk mapping of the diseases transmitted by C. imicola as well as to develop the global habitat suitability for the vector.

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Bluetongue in the Sultanate of Oman, a preliminary epidemiological study

Cited by 3 publications

References 14 publications

Temperature and the persistence of viruses in culicoides spp. during adverse conditions

Temperature and the persistence of viruses in culicoides spp. during adverse conditions

Study of Akabane infection in Saudi Arabia by the use of sentinel ruminants

Updating the global occurrence of Culicoides imicola, a vector for emerging viral diseases

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