Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia
A cross-sectional study with repeated sampling was conducted to investigate potential risk factors for Newcastle disease (ND) seropositivity and for incidence of ND virus (NDV) exposure in household flocks of backyard chickens in Eastern Shewa zone, Ethiopia. Data were collected from 260 randomly selected households in 52 villages in Adami Tulu Jido Kombolcha and Ada'a woredas (districts) using a structured questionnaire, and serum samples from chickens were tested for NDV antibodies using a blocking enzyme-linked immunosorbent assay (ELISA). Sampling took place during September 2009 and the same households were again sampled in May 2010. Household-level seroprevalence and incidence of NDV exposure were estimated in various ways using serological results from the two samplings, flock dynamics, and farmers' reports of ND in their flocks. The risk factors were assessed using multivariable mixed-effects logistic regression models. Household-level seroprevalence at the two sampling times was 17.4% and 27.4%, respectively, and the estimated incidence of household-level NDV exposure during the intervening period ranged between 19.7% and 25.5%. At the first sampling, reduced frequency of cleaning of poultry waste was associated with increased odds of seropositivity (OR = 4.78; 95% CI: 1.42, 16.11; P = 0.01) while hatching at home vs. other sources (buying in replacement birds, receiving as gift or buying fertile eggs) was associated with lower odds of seropositivity, both at the first sampling (OR = 0.30; 95% CI: 0.11, 0.82; P = 0.02) and the second sampling (OR = 0.23; 95% CI: 0.10, 0.52; P < 0.001). The risk of NDV exposure was shown to be higher with larger flock size at the beginning of the observation period (OR = 3.6; 95% CI: 1.25, 10.39; P = 0.02). Using an open water source (pond or river) for poultry compared to closed sources (tap or borehole) was associated with increased risk of NDV exposure (OR = 3.14; 95% CI: 1.12, 8.8; P = 0.03). The use of a grain supplement (OR = 0.14; 95% CI: 0.03, 0.69; P = 0.03) and hatching at home for flock replacement (OR = 0.23; 95% CI: 0.10, 0.52; P = 0.005) were associated with a lower risk of NDV exposure. Newcastle disease seroprevalence and incidence of NDV exposure were more heterogeneous between villages than between kebeles (aggregations of villages) and woredas in the study area. Further investigation of village-level risk factors would likely improve our understanding of ND epidemiology in backyard chickens.
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Biblioteca del CIRAD Francia |
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L73 - Maladies des animaux poulet ménage surveillance épidémiologique maladie de Newcastle virus maladie de newcastle immunologie Test ELISA enquête analyse du risque facteur de risque eau effectif du cheptel complément alimentaire Paramyxovirus aviaire http://aims.fao.org/aos/agrovoc/c_1540 http://aims.fao.org/aos/agrovoc/c_3676 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_5165 http://aims.fao.org/aos/agrovoc/c_5166 http://aims.fao.org/aos/agrovoc/c_3808 http://aims.fao.org/aos/agrovoc/c_15968 http://aims.fao.org/aos/agrovoc/c_7537 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_32668 http://aims.fao.org/aos/agrovoc/c_8309 http://aims.fao.org/aos/agrovoc/c_4398 http://aims.fao.org/aos/agrovoc/c_33996 http://aims.fao.org/aos/agrovoc/c_16388 http://aims.fao.org/aos/agrovoc/c_2676 L73 - Maladies des animaux poulet ménage surveillance épidémiologique maladie de Newcastle virus maladie de newcastle immunologie Test ELISA enquête analyse du risque facteur de risque eau effectif du cheptel complément alimentaire Paramyxovirus aviaire http://aims.fao.org/aos/agrovoc/c_1540 http://aims.fao.org/aos/agrovoc/c_3676 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_5165 http://aims.fao.org/aos/agrovoc/c_5166 http://aims.fao.org/aos/agrovoc/c_3808 http://aims.fao.org/aos/agrovoc/c_15968 http://aims.fao.org/aos/agrovoc/c_7537 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_32668 http://aims.fao.org/aos/agrovoc/c_8309 http://aims.fao.org/aos/agrovoc/c_4398 http://aims.fao.org/aos/agrovoc/c_33996 http://aims.fao.org/aos/agrovoc/c_16388 http://aims.fao.org/aos/agrovoc/c_2676 |
spellingShingle |
L73 - Maladies des animaux poulet ménage surveillance épidémiologique maladie de Newcastle virus maladie de newcastle immunologie Test ELISA enquête analyse du risque facteur de risque eau effectif du cheptel complément alimentaire Paramyxovirus aviaire http://aims.fao.org/aos/agrovoc/c_1540 http://aims.fao.org/aos/agrovoc/c_3676 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_5165 http://aims.fao.org/aos/agrovoc/c_5166 http://aims.fao.org/aos/agrovoc/c_3808 http://aims.fao.org/aos/agrovoc/c_15968 http://aims.fao.org/aos/agrovoc/c_7537 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_32668 http://aims.fao.org/aos/agrovoc/c_8309 http://aims.fao.org/aos/agrovoc/c_4398 http://aims.fao.org/aos/agrovoc/c_33996 http://aims.fao.org/aos/agrovoc/c_16388 http://aims.fao.org/aos/agrovoc/c_2676 L73 - Maladies des animaux poulet ménage surveillance épidémiologique maladie de Newcastle virus maladie de newcastle immunologie Test ELISA enquête analyse du risque facteur de risque eau effectif du cheptel complément alimentaire Paramyxovirus aviaire http://aims.fao.org/aos/agrovoc/c_1540 http://aims.fao.org/aos/agrovoc/c_3676 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_5165 http://aims.fao.org/aos/agrovoc/c_5166 http://aims.fao.org/aos/agrovoc/c_3808 http://aims.fao.org/aos/agrovoc/c_15968 http://aims.fao.org/aos/agrovoc/c_7537 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_32668 http://aims.fao.org/aos/agrovoc/c_8309 http://aims.fao.org/aos/agrovoc/c_4398 http://aims.fao.org/aos/agrovoc/c_33996 http://aims.fao.org/aos/agrovoc/c_16388 http://aims.fao.org/aos/agrovoc/c_2676 Chaka, Hassen Goutard, Flavie Roger, François Bisschop, Shahn Thompson, Peter Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia |
description |
A cross-sectional study with repeated sampling was conducted to investigate potential risk factors for Newcastle disease (ND) seropositivity and for incidence of ND virus (NDV) exposure in household flocks of backyard chickens in Eastern Shewa zone, Ethiopia. Data were collected from 260 randomly selected households in 52 villages in Adami Tulu Jido Kombolcha and Ada'a woredas (districts) using a structured questionnaire, and serum samples from chickens were tested for NDV antibodies using a blocking enzyme-linked immunosorbent assay (ELISA). Sampling took place during September 2009 and the same households were again sampled in May 2010. Household-level seroprevalence and incidence of NDV exposure were estimated in various ways using serological results from the two samplings, flock dynamics, and farmers' reports of ND in their flocks. The risk factors were assessed using multivariable mixed-effects logistic regression models. Household-level seroprevalence at the two sampling times was 17.4% and 27.4%, respectively, and the estimated incidence of household-level NDV exposure during the intervening period ranged between 19.7% and 25.5%. At the first sampling, reduced frequency of cleaning of poultry waste was associated with increased odds of seropositivity (OR = 4.78; 95% CI: 1.42, 16.11; P = 0.01) while hatching at home vs. other sources (buying in replacement birds, receiving as gift or buying fertile eggs) was associated with lower odds of seropositivity, both at the first sampling (OR = 0.30; 95% CI: 0.11, 0.82; P = 0.02) and the second sampling (OR = 0.23; 95% CI: 0.10, 0.52; P < 0.001). The risk of NDV exposure was shown to be higher with larger flock size at the beginning of the observation period (OR = 3.6; 95% CI: 1.25, 10.39; P = 0.02). Using an open water source (pond or river) for poultry compared to closed sources (tap or borehole) was associated with increased risk of NDV exposure (OR = 3.14; 95% CI: 1.12, 8.8; P = 0.03). The use of a grain supplement (OR = 0.14; 95% CI: 0.03, 0.69; P = 0.03) and hatching at home for flock replacement (OR = 0.23; 95% CI: 0.10, 0.52; P = 0.005) were associated with a lower risk of NDV exposure. Newcastle disease seroprevalence and incidence of NDV exposure were more heterogeneous between villages than between kebeles (aggregations of villages) and woredas in the study area. Further investigation of village-level risk factors would likely improve our understanding of ND epidemiology in backyard chickens. |
format |
article |
topic_facet |
L73 - Maladies des animaux poulet ménage surveillance épidémiologique maladie de Newcastle virus maladie de newcastle immunologie Test ELISA enquête analyse du risque facteur de risque eau effectif du cheptel complément alimentaire Paramyxovirus aviaire http://aims.fao.org/aos/agrovoc/c_1540 http://aims.fao.org/aos/agrovoc/c_3676 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_5165 http://aims.fao.org/aos/agrovoc/c_5166 http://aims.fao.org/aos/agrovoc/c_3808 http://aims.fao.org/aos/agrovoc/c_15968 http://aims.fao.org/aos/agrovoc/c_7537 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_32668 http://aims.fao.org/aos/agrovoc/c_8309 http://aims.fao.org/aos/agrovoc/c_4398 http://aims.fao.org/aos/agrovoc/c_33996 http://aims.fao.org/aos/agrovoc/c_16388 http://aims.fao.org/aos/agrovoc/c_2676 |
author |
Chaka, Hassen Goutard, Flavie Roger, François Bisschop, Shahn Thompson, Peter |
author_facet |
Chaka, Hassen Goutard, Flavie Roger, François Bisschop, Shahn Thompson, Peter |
author_sort |
Chaka, Hassen |
title |
Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia |
title_short |
Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia |
title_full |
Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia |
title_fullStr |
Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia |
title_full_unstemmed |
Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia |
title_sort |
household-level risk factors for newcastle disease seropositivity and incidence of newcastle disease virus exposure in backyard chicken flocks in eastern shewa zone, ethiopia |
url |
http://agritrop.cirad.fr/568363/ http://agritrop.cirad.fr/568363/1/document_568363.pdf |
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spelling |
dig-cirad-fr-5683632024-01-28T21:17:44Z http://agritrop.cirad.fr/568363/ http://agritrop.cirad.fr/568363/ Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia. Chaka Hassen, Goutard Flavie, Roger François, Bisschop Shahn, Thompson Peter. 2013. Preventive Veterinary Medicine, 109 (3-4) : 312-320.https://doi.org/10.1016/j.prevetmed.2012.10.003 <https://doi.org/10.1016/j.prevetmed.2012.10.003> Household-level risk factors for Newcastle disease seropositivity and incidence of Newcastle disease virus exposure in backyard chicken flocks in Eastern Shewa zone, Ethiopia Chaka, Hassen Goutard, Flavie Roger, François Bisschop, Shahn Thompson, Peter eng 2013 Preventive Veterinary Medicine L73 - Maladies des animaux poulet ménage surveillance épidémiologique maladie de Newcastle virus maladie de newcastle immunologie Test ELISA enquête analyse du risque facteur de risque eau effectif du cheptel complément alimentaire Paramyxovirus aviaire http://aims.fao.org/aos/agrovoc/c_1540 http://aims.fao.org/aos/agrovoc/c_3676 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_5165 http://aims.fao.org/aos/agrovoc/c_5166 http://aims.fao.org/aos/agrovoc/c_3808 http://aims.fao.org/aos/agrovoc/c_15968 http://aims.fao.org/aos/agrovoc/c_7537 http://aims.fao.org/aos/agrovoc/c_37936 http://aims.fao.org/aos/agrovoc/c_32668 http://aims.fao.org/aos/agrovoc/c_8309 http://aims.fao.org/aos/agrovoc/c_4398 http://aims.fao.org/aos/agrovoc/c_33996 http://aims.fao.org/aos/agrovoc/c_16388 Éthiopie http://aims.fao.org/aos/agrovoc/c_2676 A cross-sectional study with repeated sampling was conducted to investigate potential risk factors for Newcastle disease (ND) seropositivity and for incidence of ND virus (NDV) exposure in household flocks of backyard chickens in Eastern Shewa zone, Ethiopia. Data were collected from 260 randomly selected households in 52 villages in Adami Tulu Jido Kombolcha and Ada'a woredas (districts) using a structured questionnaire, and serum samples from chickens were tested for NDV antibodies using a blocking enzyme-linked immunosorbent assay (ELISA). Sampling took place during September 2009 and the same households were again sampled in May 2010. Household-level seroprevalence and incidence of NDV exposure were estimated in various ways using serological results from the two samplings, flock dynamics, and farmers' reports of ND in their flocks. The risk factors were assessed using multivariable mixed-effects logistic regression models. Household-level seroprevalence at the two sampling times was 17.4% and 27.4%, respectively, and the estimated incidence of household-level NDV exposure during the intervening period ranged between 19.7% and 25.5%. At the first sampling, reduced frequency of cleaning of poultry waste was associated with increased odds of seropositivity (OR = 4.78; 95% CI: 1.42, 16.11; P = 0.01) while hatching at home vs. other sources (buying in replacement birds, receiving as gift or buying fertile eggs) was associated with lower odds of seropositivity, both at the first sampling (OR = 0.30; 95% CI: 0.11, 0.82; P = 0.02) and the second sampling (OR = 0.23; 95% CI: 0.10, 0.52; P < 0.001). The risk of NDV exposure was shown to be higher with larger flock size at the beginning of the observation period (OR = 3.6; 95% CI: 1.25, 10.39; P = 0.02). Using an open water source (pond or river) for poultry compared to closed sources (tap or borehole) was associated with increased risk of NDV exposure (OR = 3.14; 95% CI: 1.12, 8.8; P = 0.03). The use of a grain supplement (OR = 0.14; 95% CI: 0.03, 0.69; P = 0.03) and hatching at home for flock replacement (OR = 0.23; 95% CI: 0.10, 0.52; P = 0.005) were associated with a lower risk of NDV exposure. Newcastle disease seroprevalence and incidence of NDV exposure were more heterogeneous between villages than between kebeles (aggregations of villages) and woredas in the study area. Further investigation of village-level risk factors would likely improve our understanding of ND epidemiology in backyard chickens. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/568363/1/document_568363.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.prevetmed.2012.10.003 10.1016/j.prevetmed.2012.10.003 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.prevetmed.2012.10.003 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.prevetmed.2012.10.003 |