| snail control in urban sites in brazil with slow-release hexabutyldistannoxane and pentachlorophenol. | slow release formulations of hexabutyldistannoxane (tbto) and pentachlorophenol (pcp) were tested for the control of biomphalaria tenagophila in 52 urban sites in rio de janeiro. tbto acted faster and lasted longer than pcp and at 15 g/m(2) it eliminated snails from 76% of the treated sites for 1 year. water pollution and rate of flow had no significant influence on the molluscicidal properties of either compound, but alkalinity lowered the activity of tbto. failure to control snail populations ... | 1976 | 1088356 |
| evaluation of temporal, seasonal and geographic stability of the molluscicidal property of euphorbia splendens latex. | laboratory tests with aqueous solutions of euphorbia splendens var. hislopii latex have demonstrated seasonal stability of the molluscacidal principle, with ld90 values of 1.14 ppm (spring), 1.02 ppm (fall), 1.09 ppm (winter), and 1.07 ppm (summer) that have been determined against biomphalaria tenagophila in the field. assays on latex collected in belo horizonte and recife yielded ld90 values similar to those obtained with the reference substance collected in rio de janeiro (ilha do governador) ... | 1992 | 1342068 |
| study of a population of biomphalaria tenagophila (orbigny, 1835) and of schistosomiasis transmission in "alto da boa vista", rio de janeiro. | the present study was performed using data from a biomphalaria tenagophila population located in a watercress garden in the alto da boa vista region representing an isolated focal point of schistosomiasis in the city of rio de janeiro. the density and age structure of this b. tenagophila population and its rate of infection by schistosoma mansoni were studied for a period of 15 months. the snail population showed seasonal variation in density, with a decrease in number of individuals at the begi ... | 1989 | 2520827 |
| factors conditioning the habitat and the density of biomphalaria tenagophila (orbigny, 1835) in an isolated schistosomiasis focus in rio de janeiro city. | the present work was carried out in a watercress garden in alto da boa vista, in the city of rio de janeiro, brazil. the investigation was carried out in two phases. the first one (1985-86) involved the sampling of biomphalaria tenegophila in two areas to determine its relative populational densities. the results showed that the populations presented similar densities and dynamics. the second phase (1988-89) involved the study of the influence of some environmental factors on the establishment o ... | 1993 | 8107608 |
| [freshwater snails of the campus of manguinhos, oswaldo cruz foundation, rio de janeiro, rj]. | a survey of freshwater gastropods of the campus of manguinhos, fundação oswaldo cruz, rio de janeiro, was carried out during the last two years aiming to compare the current species with those found at the beginning of this century. among 18 breeding sites in 880,000m2 of the surveyed area, 13 showed the following species: antillorbis nordestensis; biomphalaria glabrata; biomphalaria straminea; lymnaea columella; melanoides tuberculatus; physa cubensis; pomacea glauca and pomacea lineata. notabl ... | 2001 | 11460215 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: i-- metropolitan mesoregion. | in order to elaborate a planorbid chart of the state of rio de janeiro a survey of freshwater gastropods in the metropolitan mesoregion of this state was performed and revealed the occurrence of 20 species: antillorbis nordestensis (lucena, 1954); biomphalaria glabrata (say, 1818); biomphalaria schrammi (crosse, 1864); biomphalaria straminea (dunker, 1848); biomphalaria tenagophila (orbigny, 1835); burnupia sp.; drepanotrema anatinum (orbigny, 1835); drepanotrema cimex (moricand, 1839); drepanot ... | 2001 | 11586447 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: ii--centro fluminense mesoregion. | during the course of a survey carried out from 2000 to 2001 in the centro fluminense mesoregion of the state of rio de janeiro 22 molluscan species were found. many of the records are new due to the dearth of previous studies. concerning the snail hosts of schistosoma mansoni, the most frequently encountered species was biomphalaria tenagophila, as it occurred in all the surveyed municipalities. there are new records of biomphalaria straminea and biomphalaria peregrina which is regarded as a pot ... | 2002 | 12219122 |
| [schistosomiasis mansoni and distribution of freshwater mollusks in natural bodies of water in niterói, rio de janeiro state, brazil]. | the authors report on the distribution of freshwater mollusks in niterói, rio de janeiro state, brazil, and notification of schistosomiasis cases in this municipality from 1995 to 2000. all breeding sites favorable to freshwater mollusks were surveyed, showing the following species: antillorbis nordestensis (lucena, 1954), biomphalaria straminea (dunker, 1848), biomphalaria tenagophila (orbigny, 1835), drepanotrema anatinum (orbigny, 1835), lymnaea columella say, 1817, melanoides tuberculatus (m ... | 2002 | 12244379 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: iii--baixadas mesoregion. | in this paper, the third of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the mesoregion baixadas from 2000 to 2002 are presented. twenty-two species, belonging to seven families, were found. as to the snail intermediate hosts of schistosoma mansoni, the most frequent species was biomphalaria tenagophila besides some new findings of biomphalaria straminea. no specimens were found harboring larval forms of s. ma ... | 2002 | 12426593 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: iv - sul fluminense mesoregion. | in this paper, the forth of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the sul fluminense mesoregion from 2000 to 2002 are presented and revealed the occurrence of 18 species: antillorbis nordestensis; biomphalaria glabrata; biomphalaria peregrina; biomphalaria straminea; biomphalaria tenagophila; drepanotrema anatinum; drepanotrema cimex; drepanotrema lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp ... | 2004 | 15273799 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: v -- norte fluminense mesoregion. | in this paper, the fifth of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the norte fluminense mesoregion from 2002 to 2003 are presented and revealed the occurrence of 19 species: antillorbis nordestensis; burnupia sp.; biomphalaria tenagophila; drepanotrema anatinum; drepanotrema cimex; drepanotrema depressissimum; drepanotrema lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp.; heleobia sp.; hebetancy ... | 2004 | 15486644 |