Browsing by Author "Benavides Benavides, Bibiana"
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Item ¿Bovine besnoitiosis: present in colombia?(Corporación Universitaria Lasallista, 2011) Laverde Trujillo, Laura María; Benavides Benavides, BibianaBovine besnoitiosis has recently been classed as a re-emerging disease in Western and Central Europe, due to a recent increase in reported cases and a geographic expansion of the disease in cattle herds in continental Europe. The disease has been present in some parts of France, Spain and Portugal for many years, a fact which may be an indicative of the disease’s expansion, and it is important to know about it because it has a lot of similar lessons if compared with diseases we have in Colombia. The infection can cause serious adverse effects, both during the acute and the chronic phases that could compromise animal welfare. Bovine besnoitiosis has two distinct sequential clinical stages, namely the acute anasarca stage, which is mainly associated with the proliferation of endozoites in blood vessels, and the chronic scleroderma stage, which is mainly associated with the formation of cysts. The severity of the disease may vary between mild and severe, with possible deaths in seriously affected animals. Many infected animals remain asymptomatic and the only sign of the disease is the presence of cysts in the sclera conjunctiva and/or the vulvae area in cows.Item Epidemiological study of bovine leukemia virus in dairy cows in six herds in the municipality of Pasto, Nariño(Corporación Universitaria Lasallista, 2013-09-24) Benavides Benavides, Bibiana; Cedeño Quevedo, Darío Alejandro; Serrano De La Cruz, María FernandaIntroduction. Enzootic bovine leukosis is a highly infectious disease caused by a deltaretrovirus of the retroviridae family, which affects bovines of all ages and that generates a high economic impact on the dairy herds. This is caused by the high costs of symptomatic treatments, premature deaths and replacement of ill animals, the reduction of the milk production and the restrictions of importation and exportation imposed by some countries. Objective. To determine the prevalence of bovine leukemia virus (BLV) in its two different forms of disease presentations (persistent lymphocytosis and lymphosarcoma) and the factors associated with the seropositivity of the virus in dairy herds from Pasto, (Nariño, Colombia). Materials and methods. The study included six specialized dairy herds from Pasto, Colombia. A total of 242 blood samples were taken from 24 months of age or older cows and were analyzed using the indirect ELISA test to determine the seropositivity. The management practices were evaluated in each herd and an analysis binary logistic regression was used to find associations with seropositivity. Results. A seroprevalence of 19.8% was determined. Out of 48 positive animals, 13 had a total count over 10000 leukocytes/mm3, and 6 of these (12.5%) developed persistent lymphocytosis (PL) according to their age. No cases of lymphosarcoma or malignant lymphoma were found in the study. Concerning the management practices, the replacement of animals in different herds or in livestock fairs is associated to farms with a higher prevalence. Conclusions. Surveillance programs for dairy herds should include diagnostic tests for BLV. Only a small number of animals show consistent changes with lymphocytic or clinical disease. In addition, early diagnosis allows efficient control programs in the replacement of animals and it also prevents the spread of the virus in dairy herds.Item Seroprevalence and risk factors associated to bhv-1 and dvbv in dairy herds in Pasto, Colombia(Corporación Universitaria Lasallista, 2011) Cedeño Quevedo, Darío Alejandro; Benavides Benavides, Bibiana; Cárdenas, Guillermo; Herrera, CarlosIntroduction. The bovine herpes virus type I (BHV-1) causes the disease called Infectious Bovine Rhinotracheitis (IBR), infects cattle and presents clinical manifestations such as pustular vulvo-vaginitis, abortion, rhinotracheitis and meningoencephalitis. Objective. This research work aims to determine the prevalence of serum antibodies to bovine herpesvirus-1 (BHV-1) and bovine diarrhea (BVD) virus and risk factors associated to these infections in dairy herds in the municipality of Pasto, Colombia. Materials and methods. Farms above 2527 meters over the sea level were selected. A total of 238 serum samples were collected and analyzed using the ELISA test to determine the seropositivity against BHV-1 and BVD virus. A questionnaire, which included variables related to cattle, plus a health and a management measure were filled out in each herd. A multivariate analysis binary logistic regression was used with a confidence interval of 95% (p <0.05) using the program SPSS19 ®. Results. The estimated prevalence of exposure to BHV-1 in the municipality of Pasto was 17.65% and 32.77% for bovine viral diarrhea at the herd level. The binary logistic regression showed that the use of a bull instead of artificial insemination (OR = 30.56, CI 6.87, 135.98, P <0.0001) is a risk factor with BHV-1, and abortion (OR = 22.70, CI 4.21, 122.42, P <0.0001) and acquisition of new animals (OR = 34.90, CI 6.30, 193.43. P <0.0001) are risk factors with BVD. Conclusions. The prevalence of infectious rhinotracheitis and bovine viral diarrhea in dairy herds in Pasto does not indicate the existence of the disease in animals serologically positive, but suggests that at some point in their lives they were exposed to the virus. From the risk factors identified in this work, recommendations can be established for an effective control of reproductive diseases in the region.Item Virus de leucosis bovina: un enemigo silencioso(Corporación Universitaria Lasallista, 2012-08-21) Benavides Benavides, Bibiana; Laverde Trujillo, Laura MaríaViral bovine leukosis is an enzootic disease with a high transmissibility and caused by a virus from the retroviridae family. It affects bovine cattle of any age and causes a high economic impact, especially in dairy herds, due to the high cost of the treatment of the symptoms, premature deaths and the replacement of sick animals (Muñoz, Posso, Muñoz, 2008), reduction of milk production and international trade restrictions (Muñoz et al., 2008; Ott, Johnson, Wells, 2003). In Colombia, it was reported for the first time more than 50 years ago (Mariño, 1984) and sanitary policies have not been yet established to prevent, control and eradicate it. At the moment, it is not mandatory to declare it to the animal sanity authorities. Serologic tests, such as AGID, ELISA and polymerase chain reaction, are used to detect it.