Banca de DEFESA: EDUARDO PERES NETO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : EDUARDO PERES NETO
DATA : 25/07/2019
HORA: 14:00
LOCAL: Laboratório de Patologia - IFC - Concórdia
TÍTULO:

Outbreak of rickets in pigs in the west of Santa Catarina: cases report.

PALAVRAS-CHAVES:

Hypocalcemia; metabolic bone disease; piglet; vitamin D.

PÁGINAS: 41
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
RESUMO:

 

Rickets is a deficiency pathology that occurs in young and growing animals, leading to poor bone mineralization. Rickets has been reported in several species and cause numerous economic losses. It is caused by of calcium, phosphorus and vitamin D nutritional imbalance. The aim of this work was to report two outbreaks of rickets in commercial farms producing piglets in Seara, western region of Santa Catarina State, Brazil. In August 2016, the Veterinary Pathology Laboratory of the Instituto Federal Catarinense (IFC) Campus Concordia diagnosed outbreaks of rickets in two farms, in pigs in the nursery phase. The clinical history was obtained by interviewing the field veterinarian and the farmer. In the anamnesis, both producers reported that after three months of use of a product blending in the feed (premix) of the same company, the piglets showed forelimbs ataxia and progressive weight loss. Six animals were submitted to necropsy and organs were collected from the abdominal and thoracic cavities, central nervous system and bones; fixed in 10% buffered formalin, routinely processed, paraffin embedded and stained with hematoxylin and eosin (HE) for histopathological analysis. In addition, samples of the premix were sent to a specialized laboratory to analyze microelements levels through the atomic absorption methodology. At farm 1, there were a batch of 100 animals, the morbidity rate was 15% (15/100) and lethality was 5%. At farm 2, among 30 animals, morbidity and lethality rate were 33% (10/30). Five animals from farm 1 and one animal from farm 2 necropsied showed severe bone fragility and flexibility (6/6), growth plate discontinuity (2/6), and increased volume of costochondral joints (rickety rosary) and epiphyseal cartilage thickening (2/6). Regarding the premix used in both farms the manufactured guarantee 110 g/kg of Ca (minimum), 62 g/kg of total P and 38,400 IU/kg of vitamin D. Meanwhile the analysis of the product used in the feed mixture quantified 74.33 g/kg of Ca (minimum), 22.20 g/kg of total P and 40,098.90 IU/kg of vitamin D. The diagnosis of rickets was established through the association of clinical history, clinical signs, macroscopic, microscopic lesions and nutritional analyzes. The affected piglets weighed approximately 20 Kg of body weight and consumed an average 1.0 Kg of feed daily. The recommended amount of feed consumption for pigs at this stage is approximately 953 grams in the American literature, while national recommendations recommend a consumption of 1.036 grams/animal. Comparing information in the product label and laboratory analyses, the real level of Calcium was 32.4% (35.6 g/Kg) lower in the product, as well as total Phosphorus level, 64.2% (39.8 g/Kg) lower. On the other hand, Vitamin D levels were 4.4% (1698.9 IU) above level of guarantee provided by the company. Rickets in pigs raised intensively in Brazil occur due to non-observance of the minimum levels in the diet of Ca, P and Vitamin D. Although this is an evident conclusion, taking into account the industry's technification in the country, it is not currently expected an error in the formulation of the diet leading to animal mortality and a serious economic loss to farmers.

MEMBROS DA BANCA:
Externa ao Programa - 2714672 - AMANDA D AVILA VERARDI
Externo à Instituição - CÉLSO PILATI
Externa à Instituição - NATALHA BIONDO CRMV/SC Nº 04531 VP - UNOESC
Externo ao Programa - 2446487 - NEI FRONZA
Presidente - 2017813 - RICARDO EVANDRO MENDES