219 documents found, page 1 of 22
Susceptibility of field populations of Haematobia irritans to fipronil in Uruguay
Miraballes,Cecilia; Barros,Antonio Thadeu M.; Lucas,Martin; Klafke,Guilherme M.; Domingues,Luísa N.; Riet-Correa,FranklinABSTRACT: Fipronil was registered in Uruguay in 1997, and, since then, it has been used for the control of Haematobia irritans irritans and Rhipicephalus microplus. The susceptibility of H. irritants to this drug has not been evaluated. Therefore, the goal of the present study was to evaluate the resistance of H. irritans to fipronil. Additionally, a survey was carried out with the farmers to evaluate the use o...
Hypomagnesemia in beef cattle
Doncel,Benjamín; Puentes,Juan D.; Caffarena,Rubén D.; Riet-Correa,Franklin; Costa,Ricardo A.; Giannitti,FedericoABSTRACT: Hypomagnesemia is a major cause of death in grazing beef cows in countries of the Southern Hemisphere such as Argentina, Australia and New Zealand. Here we review the literature on hypomagnesemia in beef cattle and describe an outbreak in Uruguay. The disease occurred in late autumn, affecting 6 to 11-year-old Aberdeen Angus and Hereford x Aberdeen Angus lactating multiparous cows in good body conditi...
Conidiobolomycosis in goats
Macêdo,Juliana T.S.A.; Biscarde,Carmo E.; Pescador,Caroline A.; Nakazato,Luciano; Fonseca,Nathália D-S.; Ubiali,Daniel G.; Riet-Correa,FranklinABSTRACT: The present article presents cases of conidiobolomycosis in adult goats with clinical signs characterized by serous nasal discharge, dyspnea, apathy, and weight loss. Two goats were necropsied. Necropsy displayed increased volume on the sagittal section of the head and an ulcerated surface containing a yellow friable mass with irregular and granular consistency in the nasal septum and in the ventral n...
Causes of abortion in dairy cows in Uruguay
Macías-Rioseco,Melissa; Silveira,Caroline; Fraga,Martin; Casaux,Laura; Cabrera,Andrés; Francia,María E.; Robello,Carlos; Maya,LeticiaABSTRACT: A case series study was conducted to determine the frequency of causes of abortion in dairy cattle in Uruguay. The sample size of 102 cases was composed of 53 fetuses, 35 fetuses with placentas, and 14 placentas without an associated fetus. All cases underwent gross and microscopic pathologic examinations as well as microbiological and serological testing. The etiology was determined in 54 (53%) of ca...
Pythiosis in cattle in Northeastern Brazil
Maia,Lisanka A.; Souto,Erick P.F.; Frade,Maria T.S.; Pimentel,Luciano A.; Azevedo,Edisio O.; Kommers,Glaucia D.; Riet-Correa,FranklinABSTRACT: The epidemiological, clinical and pathological aspects of cutaneous pythiosis occurring in cattle from three farms in the Northeastern of Brazil are described. A biopsy of the lesions of one bovine from each farm was performed. In two cases, the affected cattle had contact with water accumulated in dams during the dry season in the semiarid region. Another case occurred in the coastal tropical region ...
Enzootic calcinosis in sheep in Uruguay: a brief review and report of two outbr...
Machado,Mizael; Schild,Carlos O.; Preliasco,Marcela; Balserini,Aldana; Medeiros,Rosane M.T.; Barros,Severo S.; Riet-Correa,FranklinABSTRACT: This study aimed to do a brief review of enzootic calcinosis in sheep and to report two outbreaks of Nierembergia rivularis poisoning in sheep in Uruguay. The outbreaks occurred in farms located on an island (Outbreak A) and on the border (Outbreak B) of the Rincón del Bonete lake. Sheep of all ages were affected, with the exception of suckling lambs. The first clinical signs occurred in early October...
Identification of Sindhi cows that are susceptible or resistant to Haematobia i...
Medeiros,Márcia Alves de; Barros,Antonio Thadeu Medeiros de; Riet-Correa,Franklin; Marques,Ana Rita; Lopes,José Radmácyo Gomes; Vieira,Vanessa DinizAbstract To identify susceptible and resistant Haematobia irritans cows, horn flies were counted biweekly for 3 years in a herd of 25 Sindhi cows. Repeated measures linear mixed models were created including cow as a random factor. The results were analyzed by: 1) observing horn fly counts, considering fly-susceptible cows with infestations appearing in the upper quartile more than 50% of the weeks and in the l...
Jürgen Döbereiner: a life dedicated to science
Dutra,Iveraldo S.; Colling,Axel; Driemeier,David; Brito,Marilene F.; Ubiali,Daniel G.; Schild,Ana Lucia; Riet-Correa,Franklin; Barros,Claudio S.L.ABSTRACT: Dr. Jürgen Döbereiner was born in Germany, on the 1st of November 1923, and lived in Brazil for 68 years during which time he developed a range of scientific projects in veterinary pathology and related disciplines. His main interests were the identification of new poisonous plants and mineral deficiencies and the causes of “cara inchada” (“swollen face” a periodontal disease) and botulism in livestoc...
Spontaneous poisoning by Ricinus communis leaves (Euphorbiaceae) in goats
Brito,Luiz B.; Riet-Correa,Franklin; Almeida,Valdir M.; Silva Filho,Givaldo B.; Chaves,Hisadora A.S.; Braga,Thaiza C.; Evêncio Neto,JoaquimABSTRACT: The aim of this study was to report the clinical and pathological aspects of an outbreak of poisoning by the ingestion of Ricinus communis leaves in a herd of goats at Pernambuco, northeastern Brazil. Within 3-5 hours after ingesting the sprouts and young shrubs of the plant, twenty Toggenburg female goats and two adults crossbred wethers presented acute neurological clinical signs, which were initial...
Neonatal mortality associated with sodium monofluoracetate in kids fed with col...
Lopes,José R.G.; Araújo,José A.S.; Pessoa,Danielle A.N.; Lee,Stephen; Cook,Daniel; Riet-Correa,Franklin; Medeiros,Rosane M.T.ABSTRACT: Sudden deaths after colostrum ingestion in kids and lambs born to mothers grazing in areas with Amorimia septentrionalis have been reported in the Brazilian northeastern semi-arid region, in Paraíba state. This study aimed to determine whether the sodium monofluoracetate (MF) contained in A. septentrionalis is eliminated in milk, causing the death of kids. After confirming gestation on the 25th day af...