Describing patterns of mastitis indicators during a clinical mastitis episode
Notice bibliographique
Résumé
A total of three dairy farms, run on Automatic Milking System (AMS) and having on average \n163, 177, and 99 lactating dairy cows respectively, were included in this study. Two of the farms \nwere located in the Netherlands, and one in Canada. The data was retrieved from the database of \nDeLaval International AB (Tumba, Stockholm). The study aimed to analyze and describe the \nchanges in patterns of mastitis indicators, recorded by sensors, before, during, and after a case of \nclinical mastitis (CM). In total, 149 cases of CM were identified in the study period, out of which \n91 were a first case of CM during a lactation. Fifty-eight of these cases recovered from CM. \nRecovery was defined based on the somatic cell count (SCC) values being less than 200,000 SCC/ml \nduring the end of the follow-up period. The parameters studied were the SCC, electrical conductivity \n(EC), and lactate dehydrogenase (LDH) levels of the milk for recovered and non-recovered cases. \nThe statistical analyses were carried out on recovered cases with linear mixed models and results \npresented as estimated marginal means that were used to analyze the patterns of mastitis indicators \nfor an episode of CM. Further, association analysis was also carried out to check the strength of the \nrelationship between the individual mastitis indicator before and during the treatment initiation and \nthe end of the follow-up period i.e., after 48 days of the treatment initiation. It was found that for \nrecovered cases, the increase in SCC values started approximately 5-8 days before achieving a peak \nwhereas the EC values began to increase relatively later, i.e., approximately 1-4 days before \nattaining a peak. LDH values, for both, recovered and non-recovered cases started to increase the \nearliest, that is approximately 9-12 days before attaining a peak value. Furthermore, for recovered \ncases, it took approximately 20 days for the SCC, EC, and LDH values to stabilize after achieving \na peak value. For recovered cases, the SCC and EC values took 20-24 days to drop to the pre-CM \nlevel, whereas for LDH it took up to 28 days. No significant associations between the variation in \nthe individual mastitis indicator before CM and the recovery phase were found. Further research \nwith a larger dataset is needed to test whether a pre-treatment variation in SCC, EC, and LDH is of \nvalue to predict recovery.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,002 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».