Ocorrência do fenômeno "spring rise" em cabras criadas no Cariri Paraibano.

Abstract

Occurrence of the "spring rise" phenomenon in goats raised in Cariri Paraibano. The phenomenon "spring rise" refers to the increase in the number of eggs per gram of feces and the parasite load between the end of childbirth and early lactation. The objective of this study was to evaluate the occurrence of this phenomenon in flock of goats in Semiarid of Paraiba. Two experimental groups of 20 animals each were formed one with pregnant females (group 1) and the another with empty goats or in the early stages of gestation (group 2). Eight fecal samples were taken weekly and, in group 1, four before and four after parturition. Data were analyzed using the Mann Whitney U test with a significance level of 5%. To evaluate the occurrence of statistical differences between the period of pre-partum and post-partum in the group 1 were used the Wilcoxon test with significance level of 5%. The average OPGF in the group of pregnant goats was 1181 and 571 in the control group. The statistical analyzes between groups 1 and 2 proved highly significant statistical differences between the groups (P = 0.01) demonstrating the increased parasite load in the group that was in the peripartum. Were also identified statistical differences (P = 0.005) between the period of antepartum and postpartum period in group 1 (animals peripartum). The increasing of the number of eggs per gram of feces varied during the study period. In antepartum most significant increases were observed in the last two weeks before parturition. Postpartum elevation was observed in the first month of lactation, best evidenced in the third and fourth week. Based on what was studied it was concluded that the phenomenon "spring rise" occurs in the study area and there is a need to include deworming in this group of animals as part of the tactical control of parasites.