The efficiency of dietary Sargassum aquifolium on the performance, innate immune responses, antioxidant activity, and intestinal microbiota of Nile Tilapia (Oreochromis niloticus) raised at high stocking density

2021 ◽  
Author(s):  
Samar S. Negm ◽  
Nahla E. M. Ismael ◽  
Amany I. Ahmed ◽  
Amel M. El Asely ◽  
Mohammed A. E. Naiel
Keyword(s):  
Antioxidant Activity ◽  
Immune Responses ◽  
Intestinal Microbiota ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Stocking Density ◽  
Innate Immune ◽  
Innate Immune Responses ◽  
Nile Tilapia Oreochromis Niloticus

scholarly journals Tilapia lake virus downplays innate immune responses during early stage of infection in Nile tilapia (Oreochromis niloticus)

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Kizito K. Mugimba ◽  
Mustapha Lamkhannat ◽  
Saurabh Dubey ◽  
Stephen Mutoloki ◽  
Hetron M. Munang’andu ◽  
...  
Keyword(s):  
Immune Responses ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Early Stage ◽  
Virus Titer ◽  
Early Time ◽  
Innate Immune ◽  
Economic Losses ◽  
Innate Immune Responses ◽  
Post Challenge

AbstractTilapia lake virus (TiLV) causes high mortality and high economic losses in tilapines. We describe an experimental challenge study focusing on early post challenge innate immune responses. Nile tilapia (Oreochromis niloticus) were infected with 105 TCID50/mL TiLV intraperitoneally, followed by virus quantification, histopathology and gene expression analysis in target (brain/liver) and lymphoid (spleen/headkidney) organs at 3, 7, 12, 17, and 34 days post challenge (dpc). Onset of mortality was from 21 dpc, and cumulative mortality was 38.5% by 34 dpc. Liver and kidney histopathology developed over the period 3–17 dpc, characterized by anisocytosis, anisokaryocytosis, and formation of multinucleated hepatocytes. Viral loads were highest at early time (3 dpc) in liver, spleen and kidney, declining towards 34 dpc. In brain, viral titer peaked 17 dpc. Innate sensors, TLRs 3/7 were inversely correlated with virus titer in brain and headkidney, and IFN-ß and Mx showed a similar pattern. All organs showed increased mRNA IgM expression over the course of infection. Overall, high virus titers downplay innate responses, and an increase is seen when viral titers decline. In silico modeling found that TiLV segments 4, 5 and 10 carry nucleolar localization signals. Anti-viral effects of TiLV facilitate production of virus at early stage of infection.

scholarly journals The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions

2020 ◽  
Vol 16 ◽  
pp. 100282 ◽  
Author(s):  
Mohamed A.A. Zaki ◽  
Ahmed N. Alabssawy ◽  
Abd El-Aziz M. Nour ◽  
Mohammed F. El Basuini ◽  
Mahmoud A.O. Dawood ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Carbon Sources ◽  
Stocking Density ◽  
Oxidative Status ◽  
Stress Markers ◽  
Nile Tilapia Oreochromis Niloticus ◽  
The Impact

scholarly journals Effects of starvation and subsequent re-feeding on intestinal microbiota, and metabolic responses in Nile tilapia, Oreochromis niloticus

2020 ◽  
Vol 17 ◽  
pp. 100370 ◽  
Author(s):  
Michael Essien Sakyi ◽  
Jia Cai ◽  
Jufen Tang ◽  
Emmanuel Delwin Abarike ◽  
Liqun Xia ◽  
...  
Keyword(s):  
Intestinal Microbiota ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Metabolic Responses ◽  
Nile Tilapia Oreochromis Niloticus
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