Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae
The pathological changes present in 300 red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae are described. The most consistent gross findings were marked congestion of internal organs, particularly the liver, spleen and kidneys. Other features included exophthalmos, soften...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier Ltd
2010
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| Online Access: | http://psasir.upm.edu.my/id/eprint/8305/ |
| _version_ | 1848840833428619264 |
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| author | Saad, Mohd Zamri M. N. A., Amal Abdullah, Siti Zahrah |
| author_facet | Saad, Mohd Zamri M. N. A., Amal Abdullah, Siti Zahrah |
| author_sort | Saad, Mohd Zamri |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The pathological changes present in 300 red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae are described. The most consistent gross findings were marked congestion of internal organs, particularly the liver, spleen and kidneys. Other features included exophthalmos, softening of the brain and the occasional accumulation of fluid within the abdominal cavity. Microscopical examination confirmed the presence of marked congestion of the liver, spleen and kidneys. The endothelial cells lining major blood vessels of the liver and occasionally the spleen were swollen and vacuolated. There was evidence of vascular thrombosis with infarction of surrounding tissue. Bacterial colonies were noted within and immediately surrounding the affected blood vessels. The meninges were thickened by the infiltration of numerous heterophils. Similar infiltrates of heterophils and lymphocytes were observed in the lamina propria of the intestine. The kidneys were severely congested and haemorrhagic, with extensive interstitial nephritis. |
| first_indexed | 2025-11-15T07:33:37Z |
| format | Article |
| id | upm-8305 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:33:37Z |
| publishDate | 2010 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-83052011-01-05T06:40:49Z http://psasir.upm.edu.my/id/eprint/8305/ Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae Saad, Mohd Zamri M. N. A., Amal Abdullah, Siti Zahrah The pathological changes present in 300 red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae are described. The most consistent gross findings were marked congestion of internal organs, particularly the liver, spleen and kidneys. Other features included exophthalmos, softening of the brain and the occasional accumulation of fluid within the abdominal cavity. Microscopical examination confirmed the presence of marked congestion of the liver, spleen and kidneys. The endothelial cells lining major blood vessels of the liver and occasionally the spleen were swollen and vacuolated. There was evidence of vascular thrombosis with infarction of surrounding tissue. Bacterial colonies were noted within and immediately surrounding the affected blood vessels. The meninges were thickened by the infiltration of numerous heterophils. Similar infiltrates of heterophils and lymphocytes were observed in the lamina propria of the intestine. The kidneys were severely congested and haemorrhagic, with extensive interstitial nephritis. Elsevier Ltd 2010 Article PeerReviewed Saad, Mohd Zamri and M. N. A., Amal and Abdullah, Siti Zahrah (2010) Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae. Journal of Comparative Pathology, 2-3 (143). pp. 227-229. ISSN 0021-9975 http://dx.doi.org/10.1016/j.jcpa.2010.01.020 10.1016/j.jcpa.2010.01.020 English |
| spellingShingle | Saad, Mohd Zamri M. N. A., Amal Abdullah, Siti Zahrah Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae |
| title | Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae |
| title_full | Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae |
| title_fullStr | Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae |
| title_full_unstemmed | Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae |
| title_short | Pathological changes in red tilapias (Oreochromis spp.) naturally infected by Streptococcus agalactiae |
| title_sort | pathological changes in red tilapias (oreochromis spp.) naturally infected by streptococcus agalactiae |
| url | http://psasir.upm.edu.my/id/eprint/8305/ http://psasir.upm.edu.my/id/eprint/8305/ http://psasir.upm.edu.my/id/eprint/8305/ |