Evaluation of resistance against Streptococcus agalactiae in four farmed strains of Nile tilapia (Oreochromis niloticus)
DOI:
https://doi.org/10.5433/1679-0359.2020v41n1p351Palabras clave:
Disease resistance, Streptococcosis, Challenge test, Nile tilapia.Resumen
Nile tilapia (Oreochromis niloticus) has always been considered more resistant to diseases compared to other fish species. However, in recent decades, this fish species has also been susceptible to many bacterial, fungal, parasitic, and nutritional diseases. In Brazil, streptococcosis is one of the main diseases that affect tilapia and has caused many economic losses. A resistance test was conducted with 93 tilapia of four varieties (UFLA strain and three commercial varieties: SC1, SC2, and SC3) to evaluate resistance to experimental inoculation with Streptococcus agalactiae. Each variety was distributed in five aquariums, with nine specimens of the same variety. Among the five aquariums, four housed fish were intraperitoneally inoculated with 107 CFU/fish of S. agalactiae and one aquarium harbored fish from the control group, which received 0.1 mL of sterile BHI (Brain Heart Infusion). Significant differences were observed in the survival rates accumulated at the end of the experiment (day 15), with values of 22, 36, 36, and 15% for SC1, SC2, SC3, and UFLA, respectively. The UFLA strain presented lower survival than other strains, which did not differ among the 15 days of challenge. These results demonstrate that there are animals with a better response to the resistance test than others.Citas
Evans, J. J., Klesius, P. H., Gilbert, P. M., Shoemaker, C. A., Al Sarawi, M. A., Landsberg, J., Al Zenki, S. (2002). Characterization of β-haemolytic Group B Streptococcus agalactiae in cultured sea bream, Sparusauratus L., and wild mullet, Liza klunzingeri (Day), in Kuwait. Journal of Fish Diseases, 25(9), 505-513. doi: 10.1046/j.1365-2761.2002.00392.x
Figueiredo, H. C. P., Nobrega, N. L., Leal, C. A. G., Pereira, U. P., & Mian, G. F. (2012). Streptococcus iniae outbreaks in Brazilian Nile tilapia (Oreochromis niloticus L.) farms. Brazilian Journal of Microbiology, 43(2), 576-580. doi: 10.1590/S1517-83822012000200019
Huang, B. F., Zou, L. L., Xie, J. G., Huang, Z. C., Li, Y. W., & Li, A. X. (2013). Immune responses of different species of tilapia infected with Streptococcus agalactiae. Journal of Fish Diseases, 36(8), 747-752. doi: 10.1111/jfd.12077
Iregui, C. A., Comas, J., Vasquez, G. M. & Verjan, N. (2016). Experimental early pathogenesis of Streptococcus agalactiae infection in red tilapia Oreochromis spp. Journal of Fish Diseases, 39(2). 205-215. doi: 10.1111/jfd.12347
Jimenez, A., Tibata, V., Junca, H., Ariza, F., Verjan, N., & Iregui, C. (2011). Evaluating a nested-PCR assay for detecting Streptococcus agalactiae in red tilapia (Oreochromis sp.) tissue. Aquaculture, 321(3-4), 203-206. doi: 10.1016/j.aquaculture.2011.09.011
Kaplan, E. L. & Meier, P. (1958). Nonparametric estimation from incomplete observations. Journal of the American Statistical Association, 53(282), 457-481. doi: 10.2307/2281868
La Frentz, B. R., Lozano, C. A., Shoemaker, C. A., Garcia, J. C., Xu, D. H., Lovoll, M., & Rye, M. (2016). Controlled challenge experiment demonstrates substantial additive genetic variation in resistance of Nile tilapia (Oreochromis niloticus) to Streptococcus iniae. Aquaculture, 458, 134-139. doi: 10.1016/j.aquaculture.2016.02.034
Li, L. P., Wang, R., Liang, W. W., Huang, T., Huang, Y., Luo, F. G., Lei, A. Y., Chen, M., & Gan, X. (2015). Development of live attenuated Streptococcus agalactiae vaccine for tilapia via continuous passage in vitro. Fish & shellfish immunology, 45(2), 955-963. doi: 10.1016/j.fsi.2015.06.014
Mian, G. F., Godoy, D. T., Leal, C. A. G., Yujara, T. Y., Costa, G. M., Figueiredo, H. C. P. (2009). Aspects of the natural history and virulence of S. agalactiae infection in Nile tilapia. Veterinary Microbiology, 136(1-2), 180-183. doi: 10.1016/j.vetmic.2008.10.016
Nguyen, H. T., Kanai, K., & Yoshikoshi, K. (2002). Ecological investigation of Streptococcus iniae in culture Japanese flounder (Paralichthyso livaceus) using selective isolation procedures. Aquaculture, 205, (1-2), 7-17. doi:10.1016/S0044-8486(01)00667-6
Odegard, J., Baranski, M., Gjerde, B., & Gjedrem, T. (2011). Methodology for genetic evaluation of disease resistance in aquaculture species: Challenges and future prospects. Aquaculture Research, 42, (s1), 103-114. doi: 10.1111/j.1365-2109.2010.02669.x.
Shoemaker, C. A., Lozano, C. A., Lafrentz, B. R., Garcia, J. C., Soto, E., Xu, D.-H., Rye, M. (2017). Additive genetic variation in resistance of Nile tilapia (Oreochromis niloticus) to Streptococcus iniae and S. agalactiae capsular type Ib: Is genetic resistance correlated. Aquaculture, 468,(part 1), 193-198. doi: 10.1016/j.aquaculture.2016.10.022
Yáñez, J.M. & Martínez, V. (2010). Factores genéticos que inciden en la resistencia a enfermedades infecciosas en salmónidos y su aplicación en programas de mejoramiento. Archivos Medicina Veterinaria, 42(2), 1-13. doi: 10.4067/S0301-732X2010000200002
Yáñez, J. M., Houston, R. D., & Newman, S. (2014). Genetics and genomics of disease resistance in salmonid species. Frontiers in Genetic, 5, 415. doi: 10.3389/fgene.2014.00415
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