Publications by authors named "Pedro Henrique Amancio Afonso"
Tick fever agents in Holstein calves grazing in a tropical region: predisposing factors, impact on milk production, productivity, and role of Rhipicephalus microplus in epidemiology.
Igor Maciel Lopes de Moraes Pedro Henrique Amancio Afonso Vanessa Ferreira Salvador Luccas Lourenzzo Lima Lins Leal Alliny Souza de Assis Cavalcante
Vet Parasitol
October 2024
Article Synopsis
- The study assessed the effects of the tick Rhipicephalus microplus on Holstein calves' health and productivity on a tropical dairy farm, focusing on factors impacting tick fever (TF) outbreaks.
- It involved tracking rectal temperatures and blood sampling of calves to diagnose TF agents like Anaplasma marginale and Babesia species, leading to specific treatment protocols.
- Results indicated that factors like colostrum quality, embryo transfer status, and weaning weight affected the recurrence of TF, with each recurrence reducing first lactation milk production by over 200 liters.
Chemoprophylaxis with dipropionate imidocarb (IMD) is a method adopted to prevent cattle tick fever (TF). Sixty weaned dairy heifers (±60 days old), without previous exposure to Rhipicephalus microplus ticks, were housed in Tifton paddocks and were subsequently exposed to R. microplus ticks and monitored up to 315 days old.
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