scholarly journals Rotary drum composter as a low cost method for the removal of Ascaris lumbricoides and Trichuris Trichiura in faecal sludge compost

2018 ◽  
Vol 13 (2) ◽  
pp. 237-246 ◽  
Author(s):  
Eugene Appiah-Effah ◽  
Kwabena Biritwum Nyarko ◽  
Esi Awuah ◽  
Eric Ofosu Antwi

Abstract The aim of the study was to use of rotary drum composter as a low cost method for the removal of Ascaris lumbricoides and Trichuris Trichiura in faecal sludge compost. Two runs of compost experiment (Run 1 and Run 2) were carried out consecutively. Each Run of composting was done in four different rotary drums at real scale using a mixture of faecal sludge and shredded maize cobs and monitored for 12 weeks. Concentration of Ascaris and Trichuris were measured once a week to understand their behaviour. Temperature, Moisture Content and pH were also measured. High concentrations of Ascaris and Trichuris were present in the initial compost mix of both Runs 1 and 2. The concentration of Ascaris and Trichuris respectively in Run 1 ranged from 65–77 eggs/gTS and 30–41 eggs/gTS. In Run 2, measured concentrations of Ascaris and Trichuris ranged from 77–110 eggs/gTS and 46–52 eggs/gTS. After 84 days of composting faecal sludge, Ascaris was removed by a minimum of 82% and Trichuris by a minimum of 88%. The findings showed that plastic composter with paddles performed better compared with the other experiments. This means that the type of composter have a significant impact on the removal of helminth.

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
LAKSHMI CHOUDHARY ◽  
PRABHAWATI PRABHAWATI

Prevalence of soil transmitted helminthes infections in apparently healthy school going children and other 528 people of different districts of Koshi regions of North Bihar were evaluated. Over all incidences of STHs infection was 39.39% during study. High incidence of STH was seen in the rainy season i.e., in the month of July and August, September, significantly higher (P<0.05) .The incidence of Ascaris lumbricoides was highest in the month of August (18.64%). The month of September was 15.25% followed by that of July (14.4%) and October with 10.16%. Also the incidence of hookworm registered the highest incidence in the month of June (19.27%) and lowest in the month of December (4.82%) during the study period. However prevalence of Trichuris trichiura was negligible and it was almost nil in the most of the months but was highest in month of September with 28.57% and lowest in October with 14.00% The climatic factors are responsible for soil transmitted helminthes which are temperature, rainfall and relative humidity. Ascariasis, Trichuriasis and Ancyclostomiasis (Hookworm infection) are found to be endemic in this region.


2021 ◽  
Vol 22 (9) ◽  
pp. 4433
Author(s):  
Eun Sung Lee ◽  
Byung Seok Cha ◽  
Seokjoon Kim ◽  
Ki Soo Park

In recent years, fluorescent metal nanoclusters have been used to develop bioimaging and sensing technology. Notably, protein-templated fluorescent gold nanoclusters (AuNCs) are attracting interest due to their excellent fluorescence properties and biocompatibility. Herein, we used an exosome template to synthesize AuNCs in an eco-friendly manner that required neither harsh conditions nor toxic chemicals. Specifically, we used a neutral (pH 7) and alkaline (pH 11.5) pH to synthesize two different exosome-based AuNCs (exo-AuNCs) with independent blue and red emission. Using field-emission scanning electron microscopy, energy dispersive X-ray microanalysis, nanoparticle tracking analysis, and X-ray photoelectron spectroscopy, we demonstrated that AuNCs were successfully formed in the exosomes. Red-emitting exo-AuNCs were found to have a larger Stokes shift and a stronger fluorescence intensity than the blue-emitting exo-AuNCs. Both exo-AuNCs were compatible with MCF-7 (human breast cancer), HeLa (human cervical cancer), and HT29 (human colon cancer) cells, although blue-emitting exo-AuNCs were cytotoxic at high concentrations (≥5 mg/mL). Red-emitting exo-AuNCs successfully stained the nucleus and were compatible with membrane-staining dyes. This is the first study to use exosomes to synthesize fluorescent nanomaterials for cellular imaging applications. As exosomes are naturally produced via secretion from almost all types of cell, the proposed method could serve as a strategy for low-cost production of versatile nanomaterials.


1991 ◽  
Vol 7 (1) ◽  
pp. 90-99 ◽  
Author(s):  
Joaquim Pereira da Silva ◽  
Mauro Célio de A. Marzochi ◽  
Elisabeth Cardoso Leal dos Santos

Procurou-se avaliar métodos e soluções tradicionalmente utilizados na evidenciação de ovos de helmintos parásitos, de fezes ou do solo, em amostras de areia de praia experimentalmente contaminadas com ovos de Ascaris lumbricoides, Trichuris trichiura, Toxocara canis e Ancylostoma sp. Das soluções classicamente utilizadas, a de Dicromato de Sódio (d= 1,350) foi a que apresentou melhores resultados (índice de recuperação = 50%) para ovos de Ascaris, em 24 horas de observação. As duas soluções propostas: Carbonato de Sódio (d= 1,040) e Detergente aniônico sintético - Sulfonato de Sódio (d= 1,040), apresentaram índices de recuperação surpreendentes, superiores a 80% para os ovos de Ascaris, em 24 horas de observação. Conclui-se que o detergente de uso doméstico, pelo seu baixo custo e facilidade de aquisição, pode ser usado na avaliação de rotina da contaminação de areias de praias pelos ovos de enteroparasitos, importantes indicadores de contaminação fecal, necessários a um adequado monitoramento sanitário do meio.


2006 ◽  
Vol 54 (11-12) ◽  
pp. 155-164 ◽  
Author(s):  
T. Koottatep ◽  
C. Polprasert ◽  
S. Hadsoi

Faecal sludge (FS) from the on-site sanitation systems is a nutrient-rich source but can contain high concentrations of toxic metals and chemicals and infectious micro-organisms. The study employed 3 vertical-flow CW units, each with a dimension of 5×5×0.65 m (width×length×media depth) and planted with cattails (Typha augustifolia). At the solid loading rate of 250 kg total solids (TS)/m2.yr and a 6-day percolate impoundment, the CW system could achieve chemical oxygen demand (COD), TS and total Kjeldahl nitrogen (TKN) removal efficiencies in the range of 80–96%. A solid layer of about 80 cm was found accumulated on the CW bed surface after operating the CW units for 7 years, but no clogging problem has been observed. The CW percolate was applied to 16 irrigation sunflower plant (Helianthus annuus) plots, each with a dimension of 4.5×4.5 m (width×length). In the study, tap water was mixed with 20%, 80% and 100% of the CW percolate at the application rate of 7.5 mm/day. Based on a 1-year data in which 3 crops of plantation were experimented, the contents of Zn, Mn and Cu in soil of the experimental plots were found to increase with increase in CW percolate ratios. In a plot with 100% of CW percolate irrigation, the maximum Zn, Mn and Cu concentrations of 5.0, 12.3 and 2.5 mg/kg, respectively, were detected in the percolate-fed soil, whereas no accumulation of heavy metals in the plant tissues (i.e. leaves, stems and flowers) of the sunflower were detected. The highest plant biomass yield and oil content of 1000 kg/ha and 35%, respectively, were obtained from the plots fed with 20% or 50% of the CW percolate.


1968 ◽  
Vol 2 (4) ◽  
pp. 169-214 ◽  
Author(s):  
Ruy Gomes de Moraes

1 - Foram examinadas as fezes de 2.666 indivíduos, operários e funcionários de duas Emprésas industriais, situadas, uma na cidade do Rio de Janeiro e outra no Estado do Rio (Brasil); 2 - Dos 2.666 indivíduos, 1941 (72.80%) estavam parasitados por um ou mais helmintos e 725 (27,20%) tinham seus exames de fezes negativos; 3 - De cada um dos 2.666 indivíduos foi feito um hemograma completo, tendo sido aproveitada a taxa de eosinófilos que, em associação com os exames de fezes, constituiu o objeto principal dêste trabalho. 4 - Na Tabela A observa-se o número de vêzes em que cada um dos vermes foi observado e seus respectivos percentuais. Embora não seja um trabalho de epidemiologia, verifica-se que 46,81% são infestados pelo Trichuris trichiura; 23,85% pelo Strongyloides stercoralis; 22,46% pelo Necator americanus e/ou Ancylostoma duodenale; 20,51% pelo Ascaris lumbricóides; 1,65% pelo Schistosoma mansoni; 0.67% pelo Enterobius vermicularis; 0,26% por Taenia solium ou T. saginata e 0,11% por Hymenolepis nana; 5 - Os exames de fezes foram feitos pelos métodos de Faust (ou de Ritchie), de Willis, de Baermann e de sedimentação; 6 - A eosinofilia anotada foi a relativa ou em seu percentual, sendo considerada hipereosinofilia uma taxa de eosinófilos igual ou superior a 5% (Eo > 5%); 7 - Foram abordados de modo conciso os fatores que provocam oscilações na eosinofilia normal tais como a idade, a raça, as horas do nictêmero, os fatores físicos, o sexo, os fatores químicos e outros; 8 - Tratou-se de modo mais extenso das diferenças entre as hipereosinofilias parasitárias e não parasitárias, tendo sido focalizada a dinâmica da eosinofilia traduzida na curva de Lavier. 9 - A distribuição dos 2.666 casos foi feita pelos diferentes graus de eosinofilia, tendo sido levantados gráficos e traçadas curvas sôbre a distribuição de cada helminto e de suas associações. 10 - Por ser necessário à explanação do assunto, foi criado o "índice eosinofilico", o qual corresponde à relação entre o número de casos de um determinado grupo com Eo > 5% e Eo < 5%. Para o total de casos positivos, ao "índice eosinofílico" denominamos "índice eosinofílico médio" em para o total dos negativos "índice eosinofílico residual"; 11 - Estabelecendo-se o "índice eosinofílico", pode-se ajuizar a capacidade eosinofilogênica de cada helminto isoladamente, bem como a de suas associações; 12 - Atenção especial foi dada aos problemas da existência da hipereosinofilia nos casos com exames coprológicos negativos para helmintos, tendo-se passado em revista vários dos aspectos biológicos que o assunto comporta; 13 - Outra questão de grande importância clínica explanada neste trabalho é a do encontro de casos de parasitismo por vermes, sem hipereosinofilia. O autor, baseado em seus dados e em outros colhidos na literatura sôbre o assunto, discute a fisiopatologia da eosinopoiese nas helmintoses e ojerece uma interpretação para êste fato ainda não defintivamente esclarecido.


2015 ◽  
Vol 55 (3) ◽  
pp. 136 ◽  
Author(s):  
Nelly Simarmata ◽  
Tiangsa Sembiring ◽  
Muhammad Ali

Background Soil-transmitted helminth (STH) infections remain a public health problem in developing countries. Their prevalence is particularly high in rural areas with people of low socioeconomic level. A single or mixed STH infection rarely causes death, but can affect nutritional status, growth, cognitive development and human health, especially in children.Objective To compare the nutritional status of STH-infected and uninfected children.Methods This cross-sectional study was conducted in June 2010 in children from 3 primary schools in the Simpang Empat and Kabanjahe Subdistricts, Karo District, North Sumatera Province. Fecal examinations were done by the Kato-Katz method to diagnose STH infections. Participants of this study consisted of 140 infected children and 141 uninfected children. Nutritional status classification was based on the 2000 Centers for Disease Control growth charts. All categorical data were analyzed by Chi-square test.Results Of 140 infected children, 8.6% were infected with Ascaris lumbricoides, 17.1% with Trichuris trichiura and 74.3% with mixed infections (Ascaris lumbricoides and Trichuris trichiura). We found significantly more STH infected children with mild to moderate malnutrition than the uninfected group. We also found significantly more mildly to moderately malnourished children with moderate infection intensity than mild infection intensity.Conclusion We find significantly more STH infected children with mild to moderate malnutrition than the uninfected group. We also find significantly more mildly to moderately malnourished children with moderate infection intensity than mild infection intensity. Higher severity of infection is associated with lower nutritional status.


2020 ◽  
Vol 11 (2) ◽  
pp. 126-132
Author(s):  
I Gede Gita Sastrawan ◽  
Jordaniel Setiabudi ◽  
Ni Putu Sanjiwani ◽  
Ni Komang Indriyani ◽  
Dewa Ayu Laksemi

Latar belakang: Infeksi kronis dari soil transmitted helminth (STH) dapat menyebabkan gangguan gizi, pertumbuhan dan kognitif pada anak. Untuk mengurangi dampak infeksi STH, diperlukan identifikasi faktor risiko. Penelitian ini bertujuan untuk mengidentifikasi faktor risiko yang berhubungan dengan infeksi STH pada siswa sekolah dasar di Desa Seraya Timur, Karangasem, Bali. Metode: Penelitian ini menggunakan desain potong lintang dengan mengambil total sampel. Penelitian dilaksanakan pada bulan Januari 2020. Data primer mengenai faktor-faktor risiko infeksi STH dikumpulkan dengan menggunakan kuesioner. Diagnosis infeksi STH dilakukan dengan pemeriksaan tinja dengan metode Kato-Katz. Analisis data menggunakan uji chi-square untuk menentukan faktor risiko yang berhubungan dengan infeksi STH. Hasil: Sebanyak 83 siswa yang berusia 6-12 tahun berpartisipasi dalam penelitian ini. Terdapat 9 siswa (10.84%) yang terinfeksi STH dengan intensitas infeksi ringan. Sebanyak 55.56% terinfeksi Trichuris trichiura, 33.33% terinfeksi Ascaris lumbricoides dan 11.11% terinfeksi cacing tambang. Terdapat beberapa faktor risiko yang memiliki hubungan bermakna dengan infeksi STH diantaranya adalah sering bermain tanah (OR=6.86; 95%CI 1.326-35.494), bermain tanpa alas kaki (OR=10.5; 95%CI 1.249-88.278) tidak mencuci tangan setelah bermain tanah (OR=9.450; 95%CI 1.809-49.358) dan tidak memotong kuku secara rutin (OR=6.462; 95%CI 1.250-33.388).  Pemberian obat cacing setiap enam bulan mampu memberikan efek proteksi terhadap infeksi STH (OR=0.085; 95%CI 0.016-0.449). Kesimpulan: Kebersihan diri menjadi faktor risiko yang berhubungan dengan infeksi STH. Direkomendasikan untuk meningkatkan promosi kesehatan terkait kebersihan diri disamping pemberian obat cacing setiap enam bulan. Kata kunci: Faktor risiko, infeksi STH, anak sekolah dasar   Abstract   Background: Chronic soil transmitted helminth (STH) infection might cause nutritional, growth and cognitive impairment in children. Identifying the risk factors of STH infection is crucially needed to minimize the infection effects. This study aimed to identify risk factors associated with STH infections among primary school students in Seraya Timur Village, Karangasem, Bali. Methods: This study used a cross-sectional design with a total sampling method. The study was conducted in January 2020. Risk factors data were collected using a questionnaire. The diagnosis of STH infection was done by stool examination with the Kato-Katz method. The chi-square test was used to determine the risk factors associated with STH infection. Results: 83 students with ages ranging from 6-12 years participated in this study. There were 9 students (10.84%) whose infected with mild infection of STH. 55.56% of students were infected by Trichuris trichiura, 33.33% were Ascaris lumbricoides infections and 11.11% were hookworm infections. There were several risk factors that significantly associated with STH infection including ground’s playing (OR=6.86; 95%CI 1.326-35.494), barefoot (OR=10.5; 95%CI 1.249-88.278), did not wash hands after playing soil (OR=9.450; 95%CI 1.809-49.358) and did not routinely cut their nails (OR=6.462; 95%CI 1.250-33.388). Deworming every six months could provide a protective effect against STH infection (OR=0.085; 95%CI 0.016-0.449). Conclusion: Personal hygiene is a risk factor associated with STH infection. It is recommended to increase personal hygiene promotion besides dewormed every six months. Keywords: Risk factors, STH infection, primary school students


2019 ◽  
Vol 37 (5) ◽  
pp. 502-507 ◽  
Author(s):  
Ana Pérez-Gimeno ◽  
José Navarro-Pedreño ◽  
María Belén Almendro-Candel ◽  
Ignacio Gómez ◽  
Antonis A Zorpas

The great extent of degraded soils in southeast Spain makes it necessary to carry out restoration and rehabilitation strategies. In addition, the great amount of wastes produced need to be properly managed. Several types of wastes and amendments (organic and inorganic) can be applied for soil rehabilitation and land restoration. When large areas must be restored several aspects should be considered, such as availability of the waste, its characteristics, and transport. This research focuses on the characterization and the cost of 12 waste types and amendments (such as sewage sludge compost, brown peat, black peat, fertilized peat, earthworm humus, straw hay, palm tree leaves, pine bark, exfoliated vermiculite, expanded perlite, limestone outcrops, and volcanic crushed stones) obtained from four different sources. All of them were characterized following the UNE standards for soil amendments and the cost was obtained as a mean value of four different sources. The results indicate a great variability of properties between organic and inorganic materials, as was expected. Depending on the type of restoration, the characteristics, and the cost, the materials can be selected for an adequate purpose. Sewage sludge compost is a good alternative for application in large areas related to its characteristics (organic matter content and nutrient availability) and low cost. For inorganic amendments, natural limestone outcrops were the low-cost alternative. The use of both wastes (composted sewage sludge and limestone raw materials) for soil rehabilitation can facilitate the reduction of landfill disposal and add value for these wastes. Moreover, the results are very useful for scientists and engineers who deal with the development of rehabilitation and restoration strategies.


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