Examinando por Autor "Rosas-Martinez, Ariel"

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  • Artículo
    Acceso abierto
    Prevalence of Dirofilaria immitis in shelter dogs in Bucaramanga metropolitan area, Colombia
    (2020-12) Florez-MuñozAngel Alberto; Rosas-Martinez, Ariel; Pinilla-León, Juan Carlos
    The heartworm Dirofilaria immitis is the causative agent of cardiopulmonary dirofilariosis in dogs and cats and also infects humans. The current knowledge about this parasite in South America is scarce compared to North America and Europe. Nevertheless, this parasite has been reported in some regions of Colombia. The objective of this study was to determine the prevalence and risk factors associated with D. immitis infection in shelter dogs from Bucaramanga metropolitan area. We performed a cross-sectional study using blood samples from shelter dogs. Microfilariae testing of whole blood included a blood smear and modified Knott's test. Antigen testing of serum was performed using the Anigen Rapid HW Ag Test Kit 2.0 ®. A descriptive analysis and univariable logistic regression analysis were applied. A total of 207 whole blood samples, from 7 shelters dogs in the Bucaramanga metropolitan area, were utilized. The overall prevalence of D. immitis observed in shelter dogs in the Bucaramanga metropolitan area by blood smears and modified Knott's test was 6.3% (13/ 207) and 0.5% (1/207) by immunochromatography test kit. Regarding the prevalence by municipalities, there was a statistical association (P < .05), indicating that the prevalence was higher in dogs in Girón municipality. Likewise, there was a statistical association (P < .05) between the prevalence with respect to heartworm knowledge and mosquito control. For prevalence by gender, age group, dog breed, and hair length, there was no statistical association (P > .05). For Girón municipality there was a 7.1 times (OR = 7.1; CI95% 0.8–59.2; P < .05) increased infection risk. This study provides current data and the first known report of the prevalence of D. immitis microfilaremia and antigenemia in shelter dogs in the Bucaramanga metropolitan area, and these results could be useful for designing new control measures for this infection. We observed that the prevalence of both microfilaremia and antigenemia was significantly lower in these sampled dogs compared to previous reports.
  • Artículo
    Acceso abierto
    Seroprevalence and Risk Factors of Leishmania infantum in Canine Shelters in Bucaramanga Metropolitan Area and Barrancabermeja, Andean Region Santander, Colombia
    (2022) Florez-Muñoz Angel Alberto; Trejos, Juanita; Rosas-Martinez, Ariel; Beltrão-Molento Marcelo; Quintero, Luis; Pinilla-Leon Juan Carlos
    Leishmaniasis is a protozoan disease caused by Leishmania spp. and transmitted by sand-flies to different hosts. In Colombia, Leishmania has been reported in dogs from rural and urban areas. The aims of the investigation were to define the risk factors of Leishmania infantum (L. infantum) in canine shelters in municipalities of the Bucaramanga metropolitan area, and Barrancabermeja municipality, and to determine the seroprevalence for L. infantum. An observational study was carried out. The samples were analyzed with ELISA antibody anti-L. infantum (n=282). Epidemiological data about the risk factors were achieved by conducting a survey in these dog shelters (14 questions). The data were analyzed to determine the association between the variables under study and the results of the ELISA test. The seroprevalence of L. infantum was 4.3% in the Bucaramanga metropolitan area and zero (0/48) in Barrancabermeja. The dogs sleeping outdoor was associated with the odds for Leishmania in Bucaramanga (P=0.04). We have demonstrated the seroprevalence of L. infantum in canine shelters in the Bucaramanga metropolitan area, possibly by the high contact of dogs with Lutzomyia spp. vectors. This data may help to identify risk factors in similar geographical areas, assisting to design new control strategies.