Paola Barato

Tilapia Lake Virus (TiLV) infection is one of the most challenging diseases of farmed tilapia ( Oreochromis sp.) production systems globally, however, few studies have described the epidemiology of TiLV. Here, we assessed the TiLV infection’s status in Colombia Departments by RT-PCR amplification of a pool of tissues (liver, spleen, eye, and brain)...

In Singapore during 2015, Group B Streptococcus (GBS) sequence type 283 (ST283) caused the only reported foodborne outbreak of invasive GBS disease. Over 20 percent of cases were healthy adults without comorbidities, which is unusual for GBS. The outbreak was linked to the consumption of raw freshwater fish. Subsequent investigations found that ST2...

While some Ehrlichia species, such as E. ruminantium and E. minasensis, are not popular even among veterinarians, they can infect cattle. The current study aimed to review studies on Ehrlichia spp. to evaluate its worldwide molecular prevalence, given the lack of information about bovine ehrlichiosis and the lack of previous systematic reviews and...

The Coronavirus Disease 2019 (COVID-19) pandemic, due to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is continuing and is currently raging in Latin America [[1], [2], [3], [4]]. In this region (including the Caribbean), up to July 3, 2020, 2,746,277 cases have been reported, more than 2,358,756 of them in South America, and 1,4...

Objectives: To investigate the effect of systemic administration of the immunosuppressant dexamethasone (DM) while inducing hamster buccal pouch DMBA carcinogenesis. Materials and Methods. Two different experiments were performed. In the first experiment, hamsters' right buccal pouches in group A (n = 10) were painted three times per week with 7,1...

Canine distemper virus (CDV) is the cause of a multisystem disease in domestic dogs and wild animals, infecting more than 20 carnivore and non-carnivore families and even infecting human cell lines in in vitro conditions. Phylogenetic classification based on the hemagglutinin gene shows 17 lineages with a phylogeographic distribution pattern. In Me...

Characterization of complete life cycles of haemoparasites requires the maintenance of suitable susceptible vertebrate hosts and vectors for long periods in captivity, in order to follow the complete parasitic cycle in definitive and intermediate hosts. Currently, there are few host-parasite models established in avian haemosporidian research, and...

El objetivo de este artículo fue reportar y describir seis casos de blastomicosis esplénica canina entre 2013 y 2017 en dos laboratorios de patología en Bogotá, Colombia (Laboratorio de Anatomopatología de la Universidad de La Salle-Bogotá, laboratorio de patología de la empresa CORPAVET©). Las muestras fueron obtenidas por esplenectomía consecuent...

Streptococcosis in tilapia Oreochromis sp. is possibly the most important bacterial disease for fish production worldwide. In Colombia, streptococcosis is caused by Streptococcus agalactiae (GBS), but in other countries, Streptococcus iniae is also involved. Prevention of streptococcosis is required and must be addressed for economic, social, inter...

Mesenchymal neoplasms are relatively uncommon in fish as compared to epithelial tumors. A specimen of goldfish (Carassius auratus) (51.7 g weight and 18 cm total length) was submitted by her owner for clinical evaluation to the laboratory of Aquatic Toxicology and Fish Medicine, School of Veterinary Medicine and Animal Science, Universidad Nacional...

Introduction: Epstein–Barr virus (EBV) is a γ-herpesvirus associated with various neoplasms in humans and is a probable aetiological agent in breast cancer; however, a causal relationship has not yet been established. Because of the epidemiological and clinicopathological similarities between breast cancer and canine mammary tumours, dogs have been...

General methods and suggestions on how to perform a well-managed Freshwater fish farming, based on the most commercial species in Latin America.

Background Neospora caninum is a cyst-forming, coccidian parasite which is known to cause neurological disorders in dogs and abortion and neonatal mortality in cows and other livestock. This study reports the development of a loop-mediated isothermal amplification (LAMP) assay based on the Neospora caninum Nc-5 gene and compares its efficacy for de...

Streptococcosis caused by Streptococcus agalactiae is one of the most important diseases in the tilapia aquaculture industry. The role of the capsule of Streptococcus agalactiae in adherence to fish surfaces has not been evaluated and the mechanism of capsular regulation during adhesion has not been described. The aim of this study was to evaluate...

A wide variety of neoplasms have been reported in pet avian species. However neoplasms arising of muscles are rare in pet and free-life avian species. This report describes a multicentric and metastatic embryonal rhabdomyosarcoma in a 6-year-old female Yellow-crowned Amazon (Amazona ochrocephala). The bird was presented with a subcutaneous mass on...

Streptococcosis is one of the most important diseases in tilapia (Oreochromis sp.) industry on the world; it causes serious economic losses in fish aquaculture. In tilapia, the disease is induced by Streptococcus agalactiae, S. iniae, S. dysgalactiae and Lactococcus garviae. Vaccines against S. agalactiae have a limited value (homologous biotype pr...

Samples from two adult male canines with history of epistaxis, nasal discharge, frontal region pain, chronic sinusitis and presence of a mass in the nasal cavity with invasion and destruction of nasal bones were submitted to CORPAVET. Histopathologically, both cases showed a non-encapsulated mass, composed of neoplastic cells arranged in solid clus...

P. multocida is a gram negative coco-bacillus considered part of the normal flora of the upper airways and causes disease in a wide range of animals. The pathogenic mechanisms by which this bacterium causes disease are not completely elucidated. This work describes the importance of P.multocida lipopolysaccharide (LPS) during the course of the dise...

Streptococcus agalactiae (group B streptococci, GBS) is primarily a colonizing agent of the genitourinary and gastrointestinal tracts of a significant proportion of the human population. It is, however, well established as a leading cause of bacterial sepsis and meningitis in neonates and is increasingly associated with invasive infections in adult...

Streptococcus agalactiae (group B streptococci, GBS) is primarily a colonizing agent of the genitourinary and gastrointestinal tracts of a significant proportion of the human population. It is, however, well established as a leading cause of bacterial sepsis and meningitis in neonates and is increasingly associated with invasive infections in adult...

Streptococcosis caused by Streptococcus agalactiae is one of the main diseases in tilapia aquaculture worldwide. Adhesion to a host surface is the first event that a pathogen must accomplish before establishing an infection and disease. Carbohydrate molecules such as lectins are present on the apical membrane of epithelial cells and represent poten...

Tilapia (Oreochromis sp.) are freshwater fish species belonging to the Cichlidae family, native to Africa and Middle East regions (Trewaves, 1983), and the third largest family of bony fish. Illustrations from Egyptian tombs suggest that Nile tilapia (Oreochromis niloticus) have been cultivated for over 4,000 years (Balarin & Hatton, 1979). However...

During 2012, Colombia exported to Asia, Europe and North America 21,124,000 freshwater ornamental fish (FwOF). Almost 99% of the exported fish are captured from the main east rainforest rivers in Colombia. Diseases and mortality is a trade barrier to exportation. From 2008 to 2011, 4,083 FwOF specimens (grouped in 2,203 cases), belonging to more th...

Mycobacteriosis is a chronic disease that has been reported in over 150 species of wild fish, laboratory and culture. Usually this related wasting and mortality for periods ranging from months to years. Systemic granulomatous lesions are the main histopathological finding of the disease, which must be confirmed with a positive Ziehl Neelsen (ZN ) a...

Los peces poseen un sistema inmune con muchas de las células y sustancias humo- rales presentes en vertebrados superiores, pero cuentan también con componentes y funciones especiales, como los centros melanomacrófagos y la capacidad fagocítica de los enterocitos por citar solo algunas de ellas, que difieren profundamente con sus similares en otras...

The fish immune system posses many of the cells and molecules found in higher vertebrates, but several other components and functions such as the melanomacrophage centers and the phagocityc activity of the epithelial enteric cells which are not found in higher vertebrates are described in fish, though their function is poorly understood. In adition...

Titulo en ingles: Importance of the biogeochemical cycle of aluminium (Al) with relationship with soil acidity in the fish production and public health What would be Orinoquia’s case?RESUMEN: Los hallazgos de patología branquial en peces cultivados en los Llanos Orientales, han sugerido que factores medio ambientales pueden favorecer la presentació...

Several ESAT-6-based vaccines have been widely studied in different animal models, presenting potent ability to induce both cellular and humoral responses. As ESAT-6 is a well-characterized mycobacterial antigen, its capacity to induce immune responses in a nonhuman primate model has been evaluated. The immunization of recombinant ESAT-6 (rESAT-6)...

We report on a 13-year-old boy who displayed a chronic granulomatous inflammatory reaction of 5 years duration. The lesion was resistant to different antibiotic schemes; his routine laboratory tests and chest radiographs were normal. Teledermatologic consultation and histopathologic study of skin biopsy suggested scrofulodermal tuberculosis. Polyme...

This study reports the molecular characterization and tissue expression of the non-human Aotus nancymaae primate CD1b isoform in the search for an experimental animal model to be used in evaluating the role of non-peptide antigen-presentation molecules in the immune response to infectious agents. CD1b expression on the surface of A. nancymaae perip...