SavedAdd your journal

Journals / Aquatic Research / 2019 / Cilt: 2 - Sayı: 4

PATHOGENICITY AND PATHOLOGY OF Streptococcus agalactiae IN CHALLENGED MOZAMBIQUE TILAPIA Oreochromis mossambicus (PETERS 1852) JUVENILES

Thangapalam Jawahar ABRAHAM
Meshram Supradhnya NAMDEO
Harresh ADİKESAVALU
Sayani BANERJEE
Pages
182–190
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Our results demonstrated that S. agalactiae caused a systemic infection and meningoencephalitis in the Mozambique tilapia juveniles.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Streptococcosis is one of the most important bacterial diseases of tilapia.
📊
Key Findings & Data:When challenged intraperitoneally at 107 - 108 cells/fish, S. agalactiae strains (TKT1 and TBT2) caused 40-100% mortalities in O. mossambicus.
💡
Conclusion & Impact:Our results demonstrated that S. agalactiae caused a systemic infection and meningoencephalitis in the Mozambique tilapia juveniles.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Özet

Streptococcosis is one of the most important bacterial diseases of tilapia. The present study assessed the histopathological changes induced by Streptococcus agalactiae challenge in the brain, kidney, spleen, and liver of Oreochromis mossambicus. When challenged intraperitoneally at 107 - 108 cells/fish, S. agalactiae strains (TKT1 and TBT2) caused 40-100% mortalities in O. mossambicus. The LD50 values of S. agalactiae TKT1 and TBT2 strains were 1.60×107 and 7.33×107 cells/fish, respectively. Histological sections of the challenged O. mossambicus brain exhibited meningoencephalitis, marginated haemocytes, extensive haemorrhages, oedema and neurons with marginated nuclei. The kidney of challenged tilapia showed glomerulopathy, dilation of Bowman’s capsule, nephritis, haematopoietic tissue necrosis, melanization and granulomatous-like lesions. The spleen was characterized by extensive melanomacrophage aggregation, necrosis and vasodilation. The liver had dilated and ruptured blood capillary, melanization and disintegrated tissue. The intrahepatic exocrine pancreatic tissue was disintegrated. Our results demonstrated that S. agalactiae caused a systemic infection and meningoencephalitis in the Mozambique tilapia juveniles.

🔖

Cite This Article

ABRAHAM, T. J., NAMDEO, M. S., ADİKESAVALU, H., BANERJEE, S. (2019). PATHOGENICITY AND PATHOLOGY OF Streptococcus agalactiae IN CHALLENGED MOZAMBIQUE TILAPIA Oreochromis mossambicus (PETERS 1852) JUVENILES. Aquatic Research, Cilt: 2 - Sayı: 4, 182–190. https://ajindex.com/articles/143091

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (9)

  1. Adikesavalu, H., Patra, A., Banerjee, S., Sarkar, A., Abraham, T.J. (2015). Phenotypic and molecular characterization and pathology of Flectobacillus roseus causing flectobacillosis in captive held carp Labeo rohita (Ham.) fingerlings. Aquaculture, 439, 60-65. https://doi.org/10.1016/j.aquaculture.2014.12.036
  2. Adikesavalu, H., Banerjee, S., Patra, A., Abraham, T.J. (2017). Meningoencephalitis in farmed mono-sex Nile tilapia (Oreochromis niloticus L.) caused by Streptococcus agalactiae. Archives of Polish Fisheries, 25, 187-200. https://doi.org/10.1515/aopf-2017-0018
  3. Al-Harbi A.H. (1996). Susceptibility of five species of tilapia to Streptococcus sp. Asian Fisheries Science, 9, 177-181.
  4. Alsaid, M., Daud, H.H.M., Mustapha, N.M., Bejo, S.K., Abdelhadi, Y.M., Abuseliane, A.F., Hamdan, R.H. (2013). Pathological findings of experimental Streptococcus agalactiae infection in red hybrid tilapia (Oreochromis sp.). In Proceedings of the International Conference on Chemical, Agricultural and Medical Sciences (CAMS-2013), (p. 70- 73). Kuala Lumpur, Malaysia. Amal, M.N.A., Zamri-Saad, M. (2011). Streptococcosis in tilapia (Oreochromis niloticus): a review. Pertanika Journal of Tropical Agricultural Science, 34, 195-206.
  5. Behera, B.K. Pradhan, P.K., Swaminathan, T.R., Sood, N., Prasenjit, P., Das, A., Verma, D.K., Kumar, R., Yadav M.K., Dev, A.K., Parida, P.K., Das, B.K., Lal, K.K., Jena, J.K. (2018). Emergence of Tilapia Lake Virus associated with mortalities of farmed Nile Tilapia Oreochromis niloticus (Linnaeus 1758) in India. Aquaculture, 484, 168-174. https://doi.org/10.1016/j.aquaculture.2017.11.025
  6. Boyd, C.E. (2004). Farm-level Issues in Aquaculture Certification: Tilapia. Report commissioned by WWF, p.29. Available at http://fisheries.tamu.edu/files/2013/09FarmLevel-Issues-in-Aquaculture-Certification-Tilapia.pdf (accessed on 19 October 2017)
  7. El-Sayed, A.F.M. (2006). Tilapia culture. Wallingford: CAB International, p.277. https://doi.org/10.1079/9780851990149.0000
  8. Evans, J.J., Klesius, P.H., Gilbert, P.M., Shoemaker, C.A., Al-Sarawi, M.A., Landsberg, J., Duremdez, R., AlMarzouk, A., Al-Zenki, S. (2002). Characterization of betahemolytic Group B Streptococcus agalactiae in cultured gilthead seabream, Sparus auratus (L.) and wild mullet, Liza klunzingeri (Day), in Kuwait. Journal of Fish Diseases, 5, 505-513. https://doi.org/10.1046/j.1365-2761.2002.00392.x
  9. Evans, J.J., Klesius, P.H., Shoemaker, C.A. (2006). An overview of streptococcus in warm-water fish. Aquacultu