PMID: 6710598Mar 1, 1984

Field studies on Bulinus senegalensis Muller and the transmission of Schistosoma haematobium infection in a Gambian community

Tropenmedizin Und Parasitologie
P H Goll, H A Wilkins

Abstract

Seasonal changes in populations of Bulinus senegalensis were studied in temporary pools on the Senegambian plateau. The first snails to appear had survived aestivation and had a mean height of 3 mm. Thereafter two patterns of change in snail numbers and size were observed probably related to differences between pools in snail mortality rates. The prevalence of patent schistosome infections appeared to be related to the inferred differences in snail mortality rates. The prevalence and intensity of human Schistosoma haematobium infection was greatest in villages near large pools where snail populations had relatively low schistosome infection rates compared with that in a small, shallow pool. Differences in patterns of water use are an important determinant of the intensity of human infection as well as differences in the infection rate of snails in the nearby pool. Differences between years in the rate of acquisition of S. haematobium by children were observed, with little transmission occurring in a year when mid-season rainfall was deficient. There were significant differences between villages in the annual variations of transmission.

Related Concepts

Bulinus
Bionomics
Estivation
Parasite Egg Count
Rain
Schistosoma haematobium
Katayama Fever
Seasonal Variation

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Congenital Hyperinsulinism

Congenital hyperinsulinism is caused by genetic mutations resulting in excess insulin secretion from beta cells of the pancreas. Here is the latest research.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Cell Atlas of the Human Eye

Constructing a cell atlas of the human eye will require transcriptomic and histologic analysis over the lifespan. This understanding will aid in the study of development and disease. Find the latest research pertaining to the Cell Atlas of the Human Eye here.

Femoral Neoplasms

Femoral Neoplasms are bone tumors that arise in the femur. Discover the latest research on femoral neoplasms here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.