Meunier Natascha V, Gibson Andrew D, Corfmat Julie, Mazeri Stella, Handel Ian G, Bronsvoort B Mark De C, Gamble Luke, Mellanby Richard J
The Epidemiology, Economics and Risk Assessment (EERA) Group, The Roslin Institute and the Royal (Dick) School of Veterinary Studies (R(D)SVS), Easter Bush, Midlothian, EH25 9RG, UK.
Mission Rabies, 4 Castle Street, Cranborne, BH21 5PZ Dorset, UK.
Res Vet Sci. 2019 Apr;123:305-310. doi: 10.1016/j.rvsc.2019.02.009. Epub 2019 Feb 25.
The mark-resight methodology is a widely used tool to assess both population size and vaccination coverage of free-roaming dogs. Evaluating coverage is often critical to determine the progress and impact of vaccination interventions. The aim of this study was to assess the reproducibility of the mark-resight method during a rabies vaccination campaign. A total of 90 areas in Goa, India, were surveyed on two occasions following a vaccination campaign, during which vaccinated dogs were marked. The estimated vaccination coverage for both confined and free-roaming dogs in the study area after a first round of vaccination was 68.9% (95% CI, 66.7-71.0%). The number of dogs counted in each survey, as well as the proportion of marked dogs, were the main outcomes recorded. Linear and mixed-effects models were used to evaluate the effect of survey order, surveyor, time of day, days between surveys, and weather on the outcomes between repeated surveys. Fewer dogs were likely to be counted in afternoon surveys compared to morning surveys (19.2% fewer dogs, 95%CI 7.5-31.9%) and a 17.2% (95%CI 3.6-32.7%) higher proportion of marked dogs was associated with the repeated survey compared to the first survey. Increased variation of the marked percentage between surveys was associated with using different surveyors (8.3%, 95%CI 0.4-16.2). This study demonstrated that external or personnel factors can influence the number of dogs counted and the estimated vaccination coverage of individual survey areas. Regular staff training, to ensure equal effort and quality of survey techniques between surveyors, could help standardise survey outcomes.
标记重捕法是一种广泛用于评估流浪狗种群数量和疫苗接种覆盖率的工具。评估覆盖率对于确定疫苗接种干预措施的进展和影响通常至关重要。本研究的目的是评估狂犬病疫苗接种活动期间标记重捕法的可重复性。在印度果阿邦的一次疫苗接种活动后，对90个区域进行了两次调查，在此期间对接种疫苗的狗进行了标记。第一轮疫苗接种后，研究区域内圈养和流浪狗的估计疫苗接种覆盖率为68.9%（95%置信区间，66.7 - 71.0%）。每次调查中计数的狗的数量以及被标记狗的比例是记录的主要结果。使用线性和混合效应模型来评估调查顺序、调查员、一天中的时间、两次调查之间的天数以及天气对重复调查结果的影响。与上午的调查相比，下午的调查中可能计数的狗更少（少19.2%，95%置信区间7.5 - 31.9%），与第一次调查相比，重复调查中被标记狗的比例高17.2%（95%置信区间3.6 - 32.7%）。不同调查员进行调查时，两次调查之间标记百分比的变化增加（8.3%，95%置信区间0.4 - 16.2）。本研究表明，外部或人员因素会影响计数的狗的数量以及各个调查区域估计的疫苗接种覆盖率。定期进行工作人员培训，以确保调查员之间付出同等努力并保证调查技术质量，有助于使调查结果标准化。
