Full text loading...
Fungal diseases and harmful algae
/content/chapter/10.22233/9781910443538.chap23
- Home
- Books
- BSAVA Manual of Ornamental Fish
- Chapter
Fungal diseases and harmful algae
- Author: Andrew Holliman
- From: BSAVA Manual of Ornamental Fish
- Item: Chapter 23, pp 195 - 200
- DOI: 10.22233/9781910443538.23
-
Copyright:
- Publication Date: January 2001
Abstract
THIS MANUAL HAS BEEN REMOVED FROM SALE. IT REMAINS AVAILABLE TO THOSE WHO HAVE ALREADY PURCHASED ACCESS. INDIVIDUAL CHAPTERS MAY STILL BE PURCHASED
The biological feature that characterizes fungi, above all else, is their osmotrophic (absorptive) mode of nutrition. They can neither ingest their food nor manufacture it in the way that plants do. This chapter discusses saprolegniasis, branchiomycosis, ichthyophonus, dermocystidium and harmful algae.
Preview this chapter:
Fungal diseases and harmful algae, Page 1 of 1
< Previous page | Next page > /docserver/preview/fulltext/10.22233/9781910443538/9781910443538.23-1.gif
/content/chapter/10.22233/9781910443538.chap23
Figures
/content/figure/10.22233/9781910443538.chap23.fig23_1
Figure 23.1
A fancy goldfish with Saprolegnia infection. The disease produces a dense mass of cotton wool-like growth when viewed under water. (By permission of In Practice.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_1_thumb.gif
10.22233/9781910443538/fig23_1.png
Figure 23.1
A fancy goldfish with Saprolegnia infection. The disease produces a dense mass of cotton wool-like growth when viewed under water. (By permission of In Practice.)
/content/figure/10.22233/9781910443538.chap23.fig23_2
Figure 23.2
The same fish as in Figure 23.1, having been removed from the water. The delicate fungal structure has collapsed into a slimy mass. (By permission of Koi Health Quarterly.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_2_thumb.gif
10.22233/9781910443538/fig23_2.png
Figure 23.2
The same fish as in Figure 23.1, having been removed from the water. The delicate fungal structure has collapsed into a slimy mass. (By permission of Koi Health Quarterly.)
/content/figure/10.22233/9781910443538.chap23.fig23_3
Figure 23.3
Algae frequently become entrapped in the fungal mass and give the lesion a green coloration, as seen in this goldfish. The epidermis has been lost from the dorsum and is continuing to detach further down the sides of the fish. (© W.H. Wildgoose.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_3_thumb.gif
10.22233/9781910443538/fig23_3.png
Figure 23.3
Algae frequently become entrapped in the fungal mass and give the lesion a green coloration, as seen in this goldfish. The epidermis has been lost from the dorsum and is continuing to detach further down the sides of the fish. (© W.H. Wildgoose.)
/content/figure/10.22233/9781910443538.chap23.fig23_4
Figure 23.4
A wet mount preparation of Saprolegnia revealing a tangled network of aseptate hyphae and zoosporangia (arrowed). The latter are not always present in samples from lesions. × 100 original magnification. (Courtesy of Peter Scott.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_4_thumb.gif
10.22233/9781910443538/fig23_4.png
Figure 23.4
A wet mount preparation of Saprolegnia revealing a tangled network of aseptate hyphae and zoosporangia (arrowed). The latter are not always present in samples from lesions. × 100 original magnification. (Courtesy of Peter Scott.)
/content/figure/10.22233/9781910443538.chap23.fig23_5
Figure 23.5
A club-shaped zoosporangium of S. parasitica containing primary zoospores. SEM mount, × 1000 original magnification. (Courtesy of Gordon Beakes.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_5_thumb.gif
10.22233/9781910443538/fig23_5.png
Figure 23.5
A club-shaped zoosporangium of S. parasitica containing primary zoospores. SEM mount, × 1000 original magnification. (Courtesy of Gordon Beakes.)
/content/figure/10.22233/9781910443538.chap23.fig23_6
Figure 23.6
Cross-section of a granulomatous lesion in the heart caused by Ichthyophonus hoferi infection. There is a chronic inflammatory response surrounding some spores (arrowed). H&E stain, × 100 original magnification. (Courtesy of David Bruno.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_6_thumb.gif
10.22233/9781910443538/fig23_6.png
Figure 23.6
Cross-section of a granulomatous lesion in the heart caused by Ichthyophonus hoferi infection. There is a chronic inflammatory response surrounding some spores (arrowed). H&E stain, × 100 original magnification. (Courtesy of David Bruno.)
/content/figure/10.22233/9781910443538.chap23.fig23_7
Figure 23.7
A raised lesion on the operculum of a koi due to infection with Dermocystidium koi. Scale in millimetres. (By permission of The Veterinary Record.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_7_thumb.gif
10.22233/9781910443538/fig23_7.png
Figure 23.7
A raised lesion on the operculum of a koi due to infection with Dermocystidium koi. Scale in millimetres. (By permission of The Veterinary Record.)
/content/figure/10.22233/9781910443538.chap23.fig23_8
Figure 23.8
Strong thick white ‘hyphae’ of Dermocystidium koi plucked from a mature lesion on a koi. Scale in centimetres. (By permission of The Veterinary Record.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_8_thumb.gif
10.22233/9781910443538/fig23_8.png
Figure 23.8
Strong thick white ‘hyphae’ of Dermocystidium koi plucked from a mature lesion on a koi. Scale in centimetres. (By permission of The Veterinary Record.)
/content/figure/10.22233/9781910443538.chap23.fig23_9
Figure 23.9
Spores (S) released from the ‘hyphae’ (H) of Dermocystidium koi. The characteristic spherical spores contain a large central vacuole or refractile body, with the cytoplasm and nucleus restricted to the narrow periphery. They are similar in size to an erythrocyte (E). Wet mount preparation, × 400 original magnification. (By permission of The Veterinary Record.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_9_thumb.gif
10.22233/9781910443538/fig23_9.png
Figure 23.9
Spores (S) released from the ‘hyphae’ (H) of Dermocystidium koi. The characteristic spherical spores contain a large central vacuole or refractile body, with the cytoplasm and nucleus restricted to the narrow periphery. They are similar in size to an erythrocyte (E). Wet mount preparation, × 400 original magnification. (By permission of The Veterinary Record.)
/content/figure/10.22233/9781910443538.chap23.fig23_10
Figure 23.10
Histological section of D. koi lesion showing ‘hyphae’ (H). The thin-walled hyaline capsules are filled with spores but show little inflammatory reaction in the surrounding tissue. PAS stain, × 400 original magnification. (By permission of The Veterinary Record.) © 2001 British Small Animal Veterinary Association
10.22233/9781910443538/fig23_10_thumb.gif
10.22233/9781910443538/fig23_10.png
Figure 23.10
Histological section of D. koi lesion showing ‘hyphae’ (H). The thin-walled hyaline capsules are filled with spores but show little inflammatory reaction in the surrounding tissue. PAS stain, × 400 original magnification. (By permission of The Veterinary Record.)