Morphology Of A Sanguinicolid Blood Fluke, Sanguinicola Armata, In Grass Carp (Ctenopharyngodon Idella C. V.) Fingerlings And Its Prevalence
Sanguinicola armata Plehn, 1905 is redescribed under light and Nomarski microscopy and SEM (Scanning Electron Microscopy). It is a lanceolate sanguinicolid with a single column of heavy lateral marginal spines; extensive vitellaria; long oesophagus and an X-shaped intestine with five-lobed caeca....
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| 格式: | Thesis |
| 语言: | English English |
| 出版: |
1994
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| 主题: | |
| 在线阅读: | http://psasir.upm.edu.my/id/eprint/11794/1/FPSS_1994_2_A.pdf |
| 总结: | Sanguinicola armata Plehn, 1905 is redescribed under light and Nomarski
microscopy and SEM (Scanning Electron Microscopy). It is a lanceolate
sanguinicolid with a single column of heavy lateral marginal spines; extensive
vitellaria; long oesophagus and an X-shaped intestine with five-lobed caeca.
There are 9-10 pairs of testes; median; post intestinal caeca and a single
butterfly-shaped ovary. Male and female genital pores lie adjacent to each
other, near to the posterior extremity. The uterus is short, post ovarian and
contains only one egg.SEM study revealed minute, blunt spines at the posterior part of the
proboscis and tiny posteriorly directed marginal spines at the posterior end
which were not visible under the ordinary light and Nomarski microscopy.
This had added extra taxonomical features to S. armata.
Surface morphology of S. armata under SEM also showed many
tegumental folds with ridges and crest, cilium-like structure and sensory
papillae which may be related to their nutritional, sensory, excretory, secretory,
osmoregulatory and immunological functions. Protrusion of the genital pores
viewed under SEM helps to understand the fact that cross-fertilisation as being
a rule in the trematodes' reproduction.
The prevalence rate of infection of S. armata was found to be high
(66.7%) in the locally produced grass carp (Ctenopharygodon idella) fingerlings
in the farm under the present study. This was attributed to the abundance of
aquatic snails which act as intermediate hosts of the fluke. However, the
intensity of infection was low due to the host (immunological), environmental
(stocking density and water chemistry) and parasite (reproductive biology)
factors.
Since the distribution of S. armata was highest (87.8%) in the bulbous
arteriosus, it should be examined first for quick diagnosis of the fluke. |
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