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

• Autorzy: Agi P I
• Języki publikacji: EN

Abstrakty

EN

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.

PL

Ślimaki-nosiciele były liczniejsze w wodach stojących. Udział Bulinus globosus (Morelet) wynosił 44.4% w stawach, 44.3% w wyrobiskach i 37.5% w jeziorach, a Bulinus forskali (Ehr.) 62.3% w wyrobiskach, 48.1% w stawach i 40.6% w jeziorach. Rozród ślimaków trwał cały rok, maksima przypadały w czerwcu i listopadzie, a minima w lutym i wrześniu. Zagęszczenie było związane z typem dna: udział obu gatunków wynosił 81.9% na dnie mulistym, 72.2% na podłożu betonowym, 20.0% na piasku i 7.6% na dnie ilastym. Poziom zainfekowania schistosomą był wysoki od października do grudnia. Najsilniej zarażone były ślimaki średniej wielkości.

Słowa kluczowe

EN

reproduction; ecology; infection; freshwater snail; Bulinus forskali; population dynamics; Shistosoma haematobium; snail vector; Bulinus globosus; snail; dynamics; Nigeria

• Wydawca: -
• Czasopismo: Acta Hydrobiologica
• Rocznik: 1996
• Tom: 38
• Numer: 1-2
• Opis fizyczny: p.9-17,fig.

Twórcy

autor

Agi P I

• University of Port Harcourt, P.M.B.5323, Port Harcourt, Rivers State, Nigeria

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