scholarly journals Soil contamination by Ancylostoma spp. and Toxocara spp. eggs in elementary school playgrounds in the extreme south of Brazil

2022 ◽  
Vol 31 (1) ◽  
Author(s):  
Catia Cilene Santos de Mello ◽  
Leandro Quintana Nizoli ◽  
Alexsander Ferraz ◽  
Bruno Cabral Chagas ◽  
William James Domingues Azario ◽  
...  
Keyword(s):  
Soil Contamination ◽  
Soil Samples ◽  
Zoonotic Potential ◽  
Rio Grande Do Sul ◽  
School Communities ◽  
Helminth Eggs ◽  
Recreation Areas ◽  
School Playgrounds ◽  
Flotation Method ◽  
South Of Brazil

Abstract Millions of people worldwide, and especially schoolchildren, may be infected by geohelminths due to their exposure to a contaminated environment. The aim of this study was to evaluate soil contamination by Ancylostoma spp. and Toxocara spp. eggs in recreation areas at elementary schools in Pelotas, state of Rio Grande do Sul, Brazil. Sand samples were collected from 22 schools and were processed using the centrifugal flotation method. Helminth eggs with zoonotic potential were found in 12 out of the 22 schools (54.5%). Contamination by Ancylostoma spp. and Toxocara spp. was observed in 36.4% (8/22) and 27.3% (6/22) of the soil samples collected at these schools, respectively. These findings of eggs show that the school communities are exposed to risks of zoonotic transmission.

scholarly journals Soil Contamination with Toxocara Eggs in Public Schools in Rural Areas of Southern Thailand

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Nonthapan Phasuk ◽  
Ratee Kache ◽  
Kanjana Thongtup ◽  
Saowalee Boonmuang ◽  
Chuchard Punsawad
Keyword(s):  
Public Schools ◽  
Soil Contamination ◽  
Rural Areas ◽  
Sucrose Solution ◽  
Primary Source ◽  
Soil Samples ◽  
Southern Thailand ◽  
The Status ◽  
Flotation Method

Soil is considered the primary source of Toxocara transmission to humans, especially children. The status of soil contamination with Toxocara eggs in southern Thailand is unknown. This study aimed at estimating the soil contamination with Toxocara eggs in public schools in Nakhon Si Thammarat province in southern Thailand. Soil samples were collected from 12 public schools between August and September 2017. At each site, ten soil samples were collected from the following five types of locations: (1) playgrounds, (2) football fields, (3) sidewalks, (4) schoolyards, and (5) areas around cafeterias. In total, 120 samples were examined for Toxocara eggs with a modified flotation method using a sucrose solution. Toxocara eggs were detected in 8 (66.7%) of the 12 studied public schools. Of the 120 soil samples, 22 (18.3%; 95% CI: 11.9, 26.4) were contaminated with Toxocara eggs. The highest levels of Toxocara egg contamination were observed in playgrounds (41.7%; 95% CI: 22.1, 63.4), followed by football fields (20.8%; 95% CI: 7.1, 42.2), sidewalks (12.5%; 95% CI: 2.7, 32.4), and schoolyards (12.5%; 95% CI: 2.7, 32.4). There were significant differences in the distribution of Toxocara eggs across location types p<0.05. The findings demonstrated that the soil samples from public schools were contaminated with Toxocara eggs. Playgrounds were the most heavily contaminated locations. Teaching children proper handwashing steps and discouraging geophagia should be implemented to reduce the distribution of Toxocara and limit future Toxocara infections.

scholarly journals Helminth eggs with zoonotic potential in the vicinity of public schools in southern Brazil

2020 ◽  
Vol 29 (1) ◽  
Author(s):  
Catia Cilene Santos de Mello ◽  
Leandro Quintana Nizoli ◽  
Alexsander Ferraz ◽  
Bruno Cabral Chagas ◽  
William James Domingues Azario ◽  
...  
Keyword(s):  
Elementary Schools ◽  
Public Schools ◽  
Optical Microscope ◽  
Daily Activities ◽  
Zoonotic Potential ◽  
Pet Ownership ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Helminth Eggs ◽  
Municipal Schools

Abstract The aim of this study was to evaluate environmental contamination by helminth eggs with zoonotic potential that were found in dog feces in the vicinity of elementary schools. Seventy-nine samples of dog feces were collected from 28 municipal schools located in five neighborhoods in Pelotas, Rio Grande do Sul (RS), Brazil. The samples were processed using the Willis-Mollay technique and analyzed using an optical microscope (40X), to identify any parasite eggs present. All neighborhoods were positive and 74.7% of the samples exhibited one or more helminth genera. The agent with the highest prevalence was Ancylostoma spp. (93.2%), followed by Trichuris spp. (18.6%), Toxocara spp. (11.9%) and Toxascaris (1.7%). These data show that there is a need for greater care towards controlling these helminths with zoonotic potential, including responsible pet ownership and daily activities to clean and collect dog feces in the vicinity of schools, because these are places where children play and study.

scholarly journals Geohelminths in the soil of the Laguna dos Patos in Rio Grande do Sul state, Brazil

2020 ◽  
Vol 80 (4) ◽  
pp. 839-843 ◽  
Author(s):  
I. F. Leon ◽  
A. L. Strothmann ◽  
C. L. Islabão ◽  
S. Jeske ◽  
M. M. Villela
Keyword(s):  
Environmental Contamination ◽  
Public Policies ◽  
Rio Grande ◽  
Zoonotic Potential ◽  
Rio Grande Do Sul ◽  
Helminth Eggs ◽  
The One ◽  
Eggs And Larvae

Abstract This study aimed at examining the prevalence of eggs and larvae of parasites – that may cause diseases to humans and other animals – in the soil of public squares located on the shore of Laranjal beaches, in the Laguna dos Patos, in Pelotas, Rio Grande do Sul state, Brazil. Four fieldwork trips – one per season – were taken to collect samples on six squares built on the shore of these beaches. Five samples of soil were collected on every square on every fieldwork trip. The material was processed by Caldwell & Caldwell’s technique. Four squares (66.7%) were positive for helminth eggs and sample positivity was 8.3% (10). Toxocara spp. and Ancylostoma spp. were the main genera found in these places. Even though prevalence was lower than the one observed by other studies which were carried out in the area, helminths with zoonotic potential were found in the soil of the squares. It should be highlighted that measures to control dogs in these areas must be implemented and public policies must be put forth to make pets’ owners and beach goers aware of the need to mitigate environmental contamination.

scholarly journals A Comparative Investigation of Methods for the Discovery of Helminth Eggs and Coccidia Oocysts in Soil Samples

2020 ◽  
Vol 18 (4) ◽  
pp. 310-318
Author(s):  
A. Ivanov ◽  
P. T. Iliev
Keyword(s):  
Toxocara Canis ◽  
Comparative Investigation ◽  
Soil Samples ◽  
Diagnostic Practice ◽  
Helminth Eggs ◽  
Flotation Method ◽  
Eimeria Stiedai ◽  
Trichuris Vulpis

A comparative investigation of two methods of soil study was performed - a modified by us and a classic flotation method, using standard media and soil. Different flotation solutions and cultures of eggs of Trichuris vulpis, Toxocara canis and Taenia pisisformis and oocysts of Eimeria stiedai were used. A method for use in diagnostic practice is proposed.

Soil contamination with ascarid eggs in playgrounds in Kirikkale, Turkey

2006 ◽  
Vol 80 (1) ◽  
pp. 15-18 ◽  
Author(s):  
M. Aydenizöz Özkayhan
Keyword(s):  
Soil Contamination ◽  
Human Health ◽  
Zinc Sulphate ◽  
Health Hazard ◽  
Soil Samples ◽  
Flotation Method ◽  
The City ◽  
Human Health Hazard ◽  
Potential Human Health ◽  
Toxascaris Leonina

AbstractContamination of soil with feline and canine ascarid eggs in eight playgrounds in Kırıkkale, Turkey was investigated monthly from February 2003 to January 2004. Dog faeces were also collected and all samples were examined using the zinc sulphate centrifugal flotation method. Eggs of Toxocara were observed in 5 of 8 (62.5%) of playgrounds examined and in 15.6% of 480 soil samples. The number of eggs varied from 1 to 11. Eggs were observed in soil samples collected in February, March to June, August and November, with embryonated eggs appearing in June and August. Eggs of Toxascaris leonina and Taenia spp. and oocysts of Isospora spp. were also found in 1.5%, 1.0% and 0.2% of soil samples, respectively. Of 26 samples of dog faeces collected, 7.7% were contaminated with Toxocara spp. and 11.5% with Taenia spp. The presence of Toxocara eggs in the city playgrounds and dog populations suggests a potential human health hazard due to toxocariasis.

scholarly journals Frequency of geohelminths in public squares in Pelotas, RS, Brazil

2013 ◽  
Vol 22 (1) ◽  
pp. 175-178 ◽  
Author(s):  
Micaele Quintana de Moura ◽  
Sabrina Jeske ◽  
Juliana Nunes Vieira ◽  
Tiago Gallina Corrêa ◽  
Maria Elisabeth Aires Berne ◽  
...  
Keyword(s):  
Health Education ◽  
Soil Contamination ◽  
Rio Grande ◽  
Soil Samples ◽  
Contamination Rate ◽  
Rio Grande Do Sul ◽  
Sodium Dichromate ◽  
Public Areas

The frequency of parasitic contamination of public areas in the municipality of Pelotas, state of Rio Grande do Sul, Brazil, was studied between June 2010 and May 2011, when soil samples were collected from eight city squares. Out of 400 samples submitted to centrifugal floatation technique in solution of sodium dichromate with density of 1.35, 176 (44%) proved positive for at least one parasite; 29 (16.5%) samples were multi-infested. The results showed that there was a significant soil contamination rate in all the parks included in the study. The positivity rate was higher for hookworms eggs (13.5%) andToxocara eggs (8.8%);Trichuris, Ascaris andCapillaria eggs were also detected. This study shows the risks to which the population is exposed in relation to zoonotic geohelminths, and suggests that sanitation and health education measures should be implemented in the municipality.

New records of the occurrence of biting midges (Diptera: Ceratopogonidae) species in rural area of Santa Maria, Rio Grande do Sul, in the South of Brazil

2022 ◽  
Author(s):  
Julia Somavilla Lignon ◽  
Emanuelle de Souza Farias ◽  
Felipe Arley Costa Pessoa ◽  
Eduarda Maria Trentin Santi ◽  
Lucas Alexandre Farias de Souza ◽  
...  
Keyword(s):  
Rural Area ◽  
New Records ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
The South ◽  
Biting Midges ◽  
South Of Brazil ◽  
Santa Maria

scholarly journals Use of LST images from MODIS/AQUA sensor as an indication of frost occurrence in RS

2015 ◽  
Vol 19 (10) ◽  
pp. 920-925 ◽  
Author(s):  
Débora de S. Simões ◽  
Denise C. Fontana ◽  
Matheus B. Vicari
Keyword(s):  
Spatial Distribution ◽  
Land Surface Temperature ◽  
Land Surface ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Weather Stations ◽  
Aqua Satellite ◽  
South Of Brazil ◽  
June July ◽  
Minimum Air Temperature

ABSTRACTAlthough frost occurrence causes severe losses in agriculture, especially in the south of Brazil, the data of minimum air temperature (Tmin) currently available for monitoring and predicting frosts show insufficient spatial distribution. This study aimed to evaluate the MDY11A1 (LST – Land Surface Temperature) product, from the MODIS sensor on board the AQUA satellite as an estimator of frost occurrence in the southeast of the state of Rio Grande do Sul, Brazil. LST images from the nighttime overpass of the MODIS/AQUA sensor for the months of June, July and August from 2006 to 2012, and data from three conventional weather stations of the National Institute of Meteorology (INMET) were used. Consistency was observed between Tmin data measured in weather stations and LST data obtained from the MODIS sensor. According to the results, LSTs below 3 ºC recorded by the MODIS/AQUA sensor are an indication of a favorable scenario to frost occurrence.

scholarly journals State of Heavy Metals Pollution of Flooded Agricultural Land in the North Part of Republic of Srpska

2017 ◽  
Vol 17 (1) ◽  
pp. 19
Author(s):  
Tihomir Predić ◽  
Petra Nikić Nauth ◽  
Bojana Radanović ◽  
Alen Predić
Keyword(s):  
Heavy Metals ◽  
Soil Contamination ◽  
Agricultural Land ◽  
Total Content ◽  
Soil Samples ◽  
Available Phosphorus ◽  
The North ◽  
North Part ◽  
Grid Points ◽  
Phosphorus And Potassium

This paper presents the results of the research of soil contamination in flooded area located at the confluence of Bosna and Sava rivers. The sampling was performed according to a network of points Etrs89 reference European Network based on grid points of 500 m x 500 m. The total number of soil samples was 31 and 13 samples of sediment-mud. In the soil samples and sediment-mud samples various parameters were analyzed: pH H2O and 1 M KCl, humus (method by Tjurin), and the readily available phosphorus and potassium (AL method). The interpretation of total content of heavy metals in the soil was conducted according to Dutch Soil Remediation Circular (2009). The samples were analyzed for the total content of heavy metals: Pb, Cd, Cr, Ni, Zn, Cu (aqua regia digestion, AAS) and the elevated concentrations of Ni. However, Ni content in mud was from 240.5 mg/kg to 294.5 mg/kg, in soil it was from 128.9 mg/kg to 452.1 mg/kg. All mud samples were alkaline, and 79% of soil samples were alkaline and of neutral reaction. The analysis indicated that the flood in May 2014 was not caused by soil contamination with heavy metals, which however contributed to the increase of the overall content of these elements in the soil.

scholarly journals Preliminary study on the case of black rain in Rio Grande do Sul, Brazil: A synoptic point of view

2021 ◽  
Vol 14 (3) ◽  
pp. 1268
Author(s):  
Maicon Moraes Santiago ◽  
Gabriel Borges dos Santos ◽  
Iulli Pitone Cardoso ◽  
André Becker Nunes
Keyword(s):  
Forest Fires ◽  
General Circulation ◽  
Rio Grande ◽  
Reanalysis Data ◽  
Point Of View ◽  
Rio Grande Do Sul ◽  
The South ◽  
Low Level ◽  
Suspended Particulate ◽  
South Of Brazil

Particles of soot from forest fires are transported by the wind, reaching distant locations and being deposited on the soil through precipitation, which clears the atmosphere, taking suspended particulate matter into its drops. The general circulation over South America indicates the possibility of soot from forest fires in the Amazon and Pantanal to be transported to southern Brazil. The event called “black rain” was observed in the period from 11 to 13 September 2020 at São Francisco de Assis City, in Rio Grande do Sul State (RS), and so this work aims to analyze if there were any anomalies of the flow that favored the occurrence of this event, given that there was a large number of fires in this period. Through ERA5 reanalysis data and GOES-16 satellite images, it was observed that on the three days under study low-level flow to the south of Brazil was more intense than normal, with the Low Level Jet occurrences, and on days 12 and 13 such flow to the south was also observed at 500 hPa. The precipitation was due to the instability of an extended trough from the Northwestern Argentinean Low. Thus, it is believed that there was a contribution from circulation at low and mid levels in the occurrence of black rain over RS.

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