Staff View: The effect of feed-based vaccination on tilapia farm endemic for streptococcosis

The effect of feed-based vaccination on tilapia farm endemic for streptococcosis

A tilapia farm experiencing endemic streptococcosis was selected to study the effect of vaccination with a feed-based vaccine on naturally ocurring streptococcosis. A total of 9000 red tilapia, Oreochromis niloticus × Oreochromis mossambicus of 100 ± 20 g were divided into 9 cages. Fish of Group 1 i...

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Main Authors:	Ismail, M. S., Syafiq, M. R., Siti-Zahrah, A., Fahmi, S., Shahidan, H., Hanan, Y., Amal, M. N. A., Saad, M. Zamri
Format:	Article
Language:	English
Published:	Elsevier 2017
Online Access:	http://psasir.upm.edu.my/id/eprint/63429/1/The%20effect%20of%20feed-based%20vaccination%20on%20tilapia%20farm%20endemic%20for%20streptococcosis.pdf http://psasir.upm.edu.my/id/eprint/63429/ https://www.sciencedirect.com/science/article/pii/S1050464816307355
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spelling	my.upm.eprints.634292018-10-16T09:31:41Z http://psasir.upm.edu.my/id/eprint/63429/ The effect of feed-based vaccination on tilapia farm endemic for streptococcosis Ismail, M. S. Syafiq, M. R. Siti-Zahrah, A. Fahmi, S. Shahidan, H. Hanan, Y. Amal, M. N. A. Saad, M. Zamri A tilapia farm experiencing endemic streptococcosis was selected to study the effect of vaccination with a feed-based vaccine on naturally ocurring streptococcosis. A total of 9000 red tilapia, Oreochromis niloticus × Oreochromis mossambicus of 100 ± 20 g were divided into 9 cages. Fish of Group 1 in cages 1, 2 and 3 were not vaccinated. Group 2 in cages 4, 5 and 6 were vaccinated on days 0 and 14 (single booster) while Group 3 in cages 7, 8 and 9 were vaccinated on days 0, 14 and 42 (double booster). Vaccination was done by oral administration of the feed-based bacterin vaccine at 4% bodyweight. Samples of serum for antibody study and the brain, eyes and kidney for bacterial isolation were collected at 14-day intervals. The study was carried out during the critical months between April and June. Following vaccination and booster, there was significant (p < 0.05) increase in the antibody levels in all vaccinated groups from week 1 that reached the peak at week 3 before declining gradually until week 6. However, second booster on week 6 significantly (p < 0.05) increased the antibody level that remained high until the end of the 16-week study period (double booster). Streptococcus agalactiae was isolated at the start of the experiment (day 0) at an average of 10 ± 5.0% of the sampled fish. In week 4, the isolation rate was 13 ± 5.7% but increased to 18 ± 7.6% in week 8, to 25 ± 10.0% in week 10, to 28 ± 5.8% in week 12 and 25 ± 7.3% in week 14. The average isolation rate was 28 ± 7.2%, 18 ± 7.1% and 13 ± 8.2% of the fish sampled from unvaccinated, single booster and double booster groups, respectively. At the end of the study period, the survival rate was 45.2 ± 2.45% for unvaccinated, 65.3 ± 4.8% for single booster and 75.1 ± 2.1% for double booster groups. Vaccinating fish in endemic farm might not eliminate the disease but was able to significantly improve the survival rate. Elsevier 2017 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/63429/1/The%20effect%20of%20feed-based%20vaccination%20on%20tilapia%20farm%20endemic%20for%20streptococcosis.pdf Ismail, M. S. and Syafiq, M. R. and Siti-Zahrah, A. and Fahmi, S. and Shahidan, H. and Hanan, Y. and Amal, M. N. A. and Saad, M. Zamri (2017) The effect of feed-based vaccination on tilapia farm endemic for streptococcosis. Fish & Shellfish Immunology, 60 (1). pp. 21-24. ISSN 1050-4648; ESSN: 1095-9947 https://www.sciencedirect.com/science/article/pii/S1050464816307355 10.1016/j.fsi.2016.11.040
institution	Universiti Putra Malaysia
building	UPM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Putra Malaysia
content_source	UPM Institutional Repository
url_provider	http://psasir.upm.edu.my/
language	English
description	A tilapia farm experiencing endemic streptococcosis was selected to study the effect of vaccination with a feed-based vaccine on naturally ocurring streptococcosis. A total of 9000 red tilapia, Oreochromis niloticus × Oreochromis mossambicus of 100 ± 20 g were divided into 9 cages. Fish of Group 1 in cages 1, 2 and 3 were not vaccinated. Group 2 in cages 4, 5 and 6 were vaccinated on days 0 and 14 (single booster) while Group 3 in cages 7, 8 and 9 were vaccinated on days 0, 14 and 42 (double booster). Vaccination was done by oral administration of the feed-based bacterin vaccine at 4% bodyweight. Samples of serum for antibody study and the brain, eyes and kidney for bacterial isolation were collected at 14-day intervals. The study was carried out during the critical months between April and June. Following vaccination and booster, there was significant (p < 0.05) increase in the antibody levels in all vaccinated groups from week 1 that reached the peak at week 3 before declining gradually until week 6. However, second booster on week 6 significantly (p < 0.05) increased the antibody level that remained high until the end of the 16-week study period (double booster). Streptococcus agalactiae was isolated at the start of the experiment (day 0) at an average of 10 ± 5.0% of the sampled fish. In week 4, the isolation rate was 13 ± 5.7% but increased to 18 ± 7.6% in week 8, to 25 ± 10.0% in week 10, to 28 ± 5.8% in week 12 and 25 ± 7.3% in week 14. The average isolation rate was 28 ± 7.2%, 18 ± 7.1% and 13 ± 8.2% of the fish sampled from unvaccinated, single booster and double booster groups, respectively. At the end of the study period, the survival rate was 45.2 ± 2.45% for unvaccinated, 65.3 ± 4.8% for single booster and 75.1 ± 2.1% for double booster groups. Vaccinating fish in endemic farm might not eliminate the disease but was able to significantly improve the survival rate.
format	Article
author	Ismail, M. S. Syafiq, M. R. Siti-Zahrah, A. Fahmi, S. Shahidan, H. Hanan, Y. Amal, M. N. A. Saad, M. Zamri
spellingShingle	Ismail, M. S. Syafiq, M. R. Siti-Zahrah, A. Fahmi, S. Shahidan, H. Hanan, Y. Amal, M. N. A. Saad, M. Zamri The effect of feed-based vaccination on tilapia farm endemic for streptococcosis
author_facet	Ismail, M. S. Syafiq, M. R. Siti-Zahrah, A. Fahmi, S. Shahidan, H. Hanan, Y. Amal, M. N. A. Saad, M. Zamri
author_sort	Ismail, M. S.
title	The effect of feed-based vaccination on tilapia farm endemic for streptococcosis
title_short	The effect of feed-based vaccination on tilapia farm endemic for streptococcosis
title_full	The effect of feed-based vaccination on tilapia farm endemic for streptococcosis
title_fullStr	The effect of feed-based vaccination on tilapia farm endemic for streptococcosis
title_full_unstemmed	The effect of feed-based vaccination on tilapia farm endemic for streptococcosis
title_sort	effect of feed-based vaccination on tilapia farm endemic for streptococcosis
publisher	Elsevier
publishDate	2017
url	http://psasir.upm.edu.my/id/eprint/63429/1/The%20effect%20of%20feed-based%20vaccination%20on%20tilapia%20farm%20endemic%20for%20streptococcosis.pdf http://psasir.upm.edu.my/id/eprint/63429/ https://www.sciencedirect.com/science/article/pii/S1050464816307355
_version_	1643837798261719040
score	13.211869

The effect of feed-based vaccination on tilapia farm endemic for streptococcosis

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