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Efectividad del muestreo para detectar prevalencia de enfermedades podales en ganado lechero del partido de Tandil
| Content Provider | Semantic Scholar |
|---|---|
| Author | Confalonieri, O. Passucci, Juan Antonio Rodríguez, Edgardo West, Margarita Tapia, María Ofelia Soraci, Alejandro Luis |
| Copyright Year | 2008 |
| Abstract | Foot diseases of dairy cattle produce significant economic losses. We evaluated the effectiveness of a sampling to estimate the prevalence of foot diseases. We compare the estimator with the parameter obtained by reviewing all animals. A sample of 369 animals was taken from a population of 12132 animals, in 2005 year and we considerer startes according animals size. The selection method was simple random for milking cows and dry cows in a systematic way. The estimator and the prevalence parameter of foot diseases in general and digital dermatitis in particular, were compared using the binomial test. The sample prevalence in foot diseases was 2,168% (95% CI 0.94 4.23), and the parameter was 2,703%, compared with the digital dermatitis, the estimator was 0.813% (95% CI 0.17 2. 36) and the parameter 0.668%. In both cases the difference were not significant (P> 0.05). As well in sample and in population the most affected member was right back (46.95% and 62.5% respectively). Claudication 3 degree was the most common in the population (60.37%) as in the sample (75%). We conclude that the prevalence parameters are included within the confidence intervals of the estimators, validating the sampling methodology employed. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.fcv.unlp.edu.ar/images/stories/analecta/vol_28_n2/efectividad.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
