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Survey of freshwater snail vectors of schistosomiasis and study of physico-chemical parameters of the water bodies in Ogoni communities [Rivers State, Nigeria]

100%

Agi P. I.

Acta Hydrobiologica

1995

tom 37

nr 2

No freshwater snails were collected form the study area. The observed range of many physico-chemical factors was within the tolerance levels of the freshwater snails. The differences in the seasonal means of the parameters were not statistically significant. The absence of freshwater snails, including the snail vectors of schistosomiasis, was therefore attributed to the combined effect of the acidic nature of the water bodies and the low topographical terrain of the study area.

Ecology and dynamics of freshwater snail vectors of Shistosoma haematobium [Bilharz, 1852] in Ahoada local government area [Rivers State, Nigeria]

80%

Agi P. I.

Acta Hydrobiologica

1996

tom 38

nr 1-2

The snail vectors were more abundant in stagnant waters. Percentage occurrence of Bulinus globosus (Morelet) was 44.4% in ponds, 44.3% in borrow pits, and 37.5% in lakes, while the occurrence of Bulinus forskali (Ehr.) was 62.3% in borrow pits, 48.1% in ponds, and 40.6% in lakes. Snail reproduction occurred in all months of the year with peaks in June and November and troughs in February and September. Snail density was related to the bottom substratum: 81.9% on mud, 72.2% on concrete, 20.0% on sand and 7.6% on silt. Snail infection with Schistosoma was high between October and December. The medium-sized class was most infected.

Ograniczanie wyników

2 Acta Hydrobiologica

2 Agi P. I.

1 1996

1 1995

Wyniki wyszukiwania

Survey of freshwater snail vectors of schistosomiasis and study of physico-chemical parameters of the water bodies in Ogoni communities [Rivers State, Nigeria]

Ecology and dynamics of freshwater snail vectors of Shistosoma haematobium [Bilharz, 1852] in Ahoada local government area [Rivers State, Nigeria]