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Kandasamy Saravanan
Division of Fisheries Science, Indian Council of Agricultural Research-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India

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Journal article
Published: 15 July 2021 in Viruses
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The present study was intended to screen the wild crustaceans for co-infection with Infectious Hypodermal and Hematopoietic Necrosis Virus (IHHNV) and White Spot Syndrome Virus (WSSV) in Andaman and Nicobar Archipelago, India. We screened a total of 607 shrimp and 110 crab samples using a specific polymerase chain reaction, and out of them, 82 shrimps (13.5%) and 5 (4.5%) crabs were found positive for co-infection of IHHNV and WSSV. A higher rate of co-infection was observed in Penaeus monodon and Scylla serrata than other shrimp and crab species. The nucleotide sequences of IHHNV and WSSV obtained from crab in this present study exhibited very high sequence identity with their counterparts retrieved from various countries. Histopathological analysis of the infected shrimp gill sections further confirmed the eosinophilic intra-nuclear cowdry type A inclusion bodies and basophilic intra-nuclear inclusion bodies characteristics of IHHNV and WSSV infections, respectively. The present study serves as the first report on co-infection of WSSV and IHHNV in Andaman and Nicobar Archipelago, India and accentuates the critical need for continuous monitoring of wild crustaceans and appropriate biosecurity measures for brackishwater aquaculture.

ACS Style

Kandasamy Saravanan; Jayasimhan Praveenraj; Rajendran Kiruba-Sankar; Varsha Devi; Utpal Biswas; Thangaraj Kumar; Arun Sudhagar; Mansour El-Matbouli; Gokhlesh Kumar. Co-Infection of Infectious Hypodermal and Hematopoietic Necrosis Virus (IHHNV) and White Spot Syndrome Virus (WSSV) in the Wild Crustaceans of Andaman and Nicobar Archipelago, India. Viruses 2021, 13, 1378 .

AMA Style

Kandasamy Saravanan, Jayasimhan Praveenraj, Rajendran Kiruba-Sankar, Varsha Devi, Utpal Biswas, Thangaraj Kumar, Arun Sudhagar, Mansour El-Matbouli, Gokhlesh Kumar. Co-Infection of Infectious Hypodermal and Hematopoietic Necrosis Virus (IHHNV) and White Spot Syndrome Virus (WSSV) in the Wild Crustaceans of Andaman and Nicobar Archipelago, India. Viruses. 2021; 13 (7):1378.

Chicago/Turabian Style

Kandasamy Saravanan; Jayasimhan Praveenraj; Rajendran Kiruba-Sankar; Varsha Devi; Utpal Biswas; Thangaraj Kumar; Arun Sudhagar; Mansour El-Matbouli; Gokhlesh Kumar. 2021. "Co-Infection of Infectious Hypodermal and Hematopoietic Necrosis Virus (IHHNV) and White Spot Syndrome Virus (WSSV) in the Wild Crustaceans of Andaman and Nicobar Archipelago, India." Viruses 13, no. 7: 1378.

Erratum
Published: 16 June 2021 in Aquaculture
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ACS Style

K. Saravanan; T. Sivaramakrishnan; J. Praveenraj; R. Kiruba-Sankar; Harsha Haridas; Shailesh Kumar; Benny Varghese. Corrigendum to “Effects of single and multi-strain probiotics on the growth, hemato-immunological, enzymatic activity, gut morphology and disease resistance in Rohu, Labeo rohita” [Aquaculture, Volume 540, 15 July 2021, 736749]. Aquaculture 2021, 737039 .

AMA Style

K. Saravanan, T. Sivaramakrishnan, J. Praveenraj, R. Kiruba-Sankar, Harsha Haridas, Shailesh Kumar, Benny Varghese. Corrigendum to “Effects of single and multi-strain probiotics on the growth, hemato-immunological, enzymatic activity, gut morphology and disease resistance in Rohu, Labeo rohita” [Aquaculture, Volume 540, 15 July 2021, 736749]. Aquaculture. 2021; ():737039.

Chicago/Turabian Style

K. Saravanan; T. Sivaramakrishnan; J. Praveenraj; R. Kiruba-Sankar; Harsha Haridas; Shailesh Kumar; Benny Varghese. 2021. "Corrigendum to “Effects of single and multi-strain probiotics on the growth, hemato-immunological, enzymatic activity, gut morphology and disease resistance in Rohu, Labeo rohita” [Aquaculture, Volume 540, 15 July 2021, 736749]." Aquaculture , no. : 737039.

Journal article
Published: 09 April 2021 in Aquaculture
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The present study was aimed at evaluating the effects of Bacillus strains obtained from the mangrove environment as dietary probiotic on Rohu, Labeo rohita. Under the laboratory trial, Rohu fingerlings (average weight 5.02 ± 0.85 g) were fed with nine experimental diets containing B. amyloliquefaciens BN06 (106 cfu/ g feed as Treatment 1 (T1) and 109 cfu/ g feed as T2), B. subtilis WN07 (106 cfu/ g feed as T3 and 109 cfu/ g feed as T4), B. megaterium CT03 (106 cfu/ g feed as T5 and 109 cfu/ g feed as T6) and a mixture of all the three bacteria in equal parts (106 cfu/ g feed as T7 and 109 cfu/ g feed as T8) and control feed (C) without probiotic bacteria for 45 days. After 45 days of feeding trial, the fishes were challenged with Aeromonas hydrophila, and survival percentage was recorded for 10 days. Results revealed that weight gain and specific growth rate were significantly higher (P < 0.05) in T7 and T8 than control. Hemato-immunological parameters such as white blood cells, red blood cells, hemoglobin, and serum superoxide dismutase activity were significantly higher in T7 than control. Intestinal α-amylase and protease activities were considerably higher in T7 than control and all other treatments. Significantly higher villi length and post-challenge survival was observed in T7 than control. A field trial was conducted in earthen ponds for four months to revalidate the obtained results. Carp fingerlings comprising of rohu (average weight 9.92 ± 1.25 g) and catla (average weight 3.12 ± 0.43 g) were distributed in three treatment groups containing the formulated feed with a mixture of B. amyloliquefaciens BN06, B. subtilis WN07 and B. megaterium CT03 at 106 cfu/ g feed as FT1, formulated feed without probiotic bacteria as FT2 and farmer's practice comprising of a mixture of rice bran and groundnut oil cake as FT3. At the end of field trial, the results showed that growth and hemato-immunological parameters were significantly higher (P < 0.05) in FT1 than FT2 and FT3. The present study revealed that multi-strain probiotics comprising of B. amyloliquefaciens BN06, B. subtilis WN07 and B. megaterium CT03 at 106 cfu/ g feed could be a more effective source of dietary probiotic for rohu fingerlings, which further proved that the bacteria isolated from mangrove environment could confer beneficial effects to the freshwater fishes.

ACS Style

K. Saravanan; T. Sivaramakrishnan; J. Praveenraj; R. Kiruba-Sankar; Harsha Haridas; Shailesh Kumar; Benny Varghese. Effects of single and multi-strain probiotics on the growth, hemato-immunological, enzymatic activity, gut morphology and disease resistance in Rohu, Labeo rohita. Aquaculture 2021, 540, 736749 .

AMA Style

K. Saravanan, T. Sivaramakrishnan, J. Praveenraj, R. Kiruba-Sankar, Harsha Haridas, Shailesh Kumar, Benny Varghese. Effects of single and multi-strain probiotics on the growth, hemato-immunological, enzymatic activity, gut morphology and disease resistance in Rohu, Labeo rohita. Aquaculture. 2021; 540 ():736749.

Chicago/Turabian Style

K. Saravanan; T. Sivaramakrishnan; J. Praveenraj; R. Kiruba-Sankar; Harsha Haridas; Shailesh Kumar; Benny Varghese. 2021. "Effects of single and multi-strain probiotics on the growth, hemato-immunological, enzymatic activity, gut morphology and disease resistance in Rohu, Labeo rohita." Aquaculture 540, no. : 736749.