Abstract
Highly pathogenic avian influenza (HPAI) virus H5N1 spread throughout Nigeria between 2006 and 2007. Bird samples collected across the country were submitted through the free-of-charge (FOC) program to the National Veterinary Research Institute, Vom (NVRI-Vom) laboratory. The present article describes the spatial distributions and evaluated clustering of the FOC submissions from poultry farms at the global, local, and focal levels between 2006 and 2007 epidemic in Nigeria. Spatial statistics evaluating clustering of the FOC submissions were implemented using the Moran’s I test, the purely spatial cluster analysis with the SaTScan Poisson model, and the Bithell's linear score test. A significant global clustering of the FOC submissions was observed. Significant local clusters of submissions were observed in the North-East, North-Central, and South-West zones. There was significant decline in FOC submissions with increasing distance from NVRI-Vom. These results indicated that the geographic area of influence of the FOC submission program in Nigeria was limited to regions closer to the diagnostic laboratory. This work provides a detailed insight into the surveillance activities during the HPAI outbreaks in Nigeria, and should assist policy-makers and field veterinarians to improve the effectiveness of national eradication plans in the face of any outbreak of animal diseases.
| Original language | Italian |
|---|---|
| Pages (from-to) | 13-20 |
| Number of pages | 8 |
| Journal | Veterinaria italiana |
| Volume | 54 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2018 |
| Externally published | Yes |
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Keywords
- Avian influenza
- Disease spread
- HPAI-H5N1
- Nigeria
- Pathology submission
- Poultry
- Spatial clustering
- Surveillance
ASJC Scopus subject areas
- veterinary(all)
Cite this
Distribuzione geografica dei campioni infetti dal virus H5n1 di influenza aviaria sottoposti ad analisi durante le fasi di introduzione e circolazione del virus in Nigeria tra il 2006 e il 2007. / Ekong, Pius S.; Cardona, Carol J.; Bryssinckx, Ward; Ikechukwu-Eneh, Chinyere; Lombin, Lami H.; Carpenter, Tim.
In: Veterinaria italiana, Vol. 54, No. 1, 01.01.2018, p. 13-20.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Distribuzione geografica dei campioni infetti dal virus H5n1 di influenza aviaria sottoposti ad analisi durante le fasi di introduzione e circolazione del virus in Nigeria tra il 2006 e il 2007
AU - Ekong, Pius S.
AU - Cardona, Carol J.
AU - Bryssinckx, Ward
AU - Ikechukwu-Eneh, Chinyere
AU - Lombin, Lami H.
AU - Carpenter, Tim
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Highly pathogenic avian influenza (HPAI) virus H5N1 spread throughout Nigeria between 2006 and 2007. Bird samples collected across the country were submitted through the free-of-charge (FOC) program to the National Veterinary Research Institute, Vom (NVRI-Vom) laboratory. The present article describes the spatial distributions and evaluated clustering of the FOC submissions from poultry farms at the global, local, and focal levels between 2006 and 2007 epidemic in Nigeria. Spatial statistics evaluating clustering of the FOC submissions were implemented using the Moran’s I test, the purely spatial cluster analysis with the SaTScan Poisson model, and the Bithell's linear score test. A significant global clustering of the FOC submissions was observed. Significant local clusters of submissions were observed in the North-East, North-Central, and South-West zones. There was significant decline in FOC submissions with increasing distance from NVRI-Vom. These results indicated that the geographic area of influence of the FOC submission program in Nigeria was limited to regions closer to the diagnostic laboratory. This work provides a detailed insight into the surveillance activities during the HPAI outbreaks in Nigeria, and should assist policy-makers and field veterinarians to improve the effectiveness of national eradication plans in the face of any outbreak of animal diseases.
AB - Highly pathogenic avian influenza (HPAI) virus H5N1 spread throughout Nigeria between 2006 and 2007. Bird samples collected across the country were submitted through the free-of-charge (FOC) program to the National Veterinary Research Institute, Vom (NVRI-Vom) laboratory. The present article describes the spatial distributions and evaluated clustering of the FOC submissions from poultry farms at the global, local, and focal levels between 2006 and 2007 epidemic in Nigeria. Spatial statistics evaluating clustering of the FOC submissions were implemented using the Moran’s I test, the purely spatial cluster analysis with the SaTScan Poisson model, and the Bithell's linear score test. A significant global clustering of the FOC submissions was observed. Significant local clusters of submissions were observed in the North-East, North-Central, and South-West zones. There was significant decline in FOC submissions with increasing distance from NVRI-Vom. These results indicated that the geographic area of influence of the FOC submission program in Nigeria was limited to regions closer to the diagnostic laboratory. This work provides a detailed insight into the surveillance activities during the HPAI outbreaks in Nigeria, and should assist policy-makers and field veterinarians to improve the effectiveness of national eradication plans in the face of any outbreak of animal diseases.
KW - Avian influenza
KW - Disease spread
KW - HPAI-H5N1
KW - Nigeria
KW - Pathology submission
KW - Poultry
KW - Spatial clustering
KW - Surveillance
UR - http://www.scopus.com/inward/record.url?scp=85045379500&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85045379500&partnerID=8YFLogxK
U2 - 10.12834/VetIt.870.4301.3
DO - 10.12834/VetIt.870.4301.3
M3 - Article
C2 - 29631310
AN - SCOPUS:85045379500
VL - 54
SP - 13
EP - 20
JO - Veterinaria italiana
JF - Veterinaria italiana
SN - 1828-1427
IS - 1
ER -