Comparative prevalences of Ascaris lumbricoides, Trichuris trichiura and hookworm infections and the prospects for combined control

Parasitology ◽  
1992 ◽  
Vol 105 (1) ◽  
pp. 151-157 ◽  
Author(s):  
M. Booth ◽  
D. A. P. Bundy
Keyword(s):  
Ascaris Lumbricoides ◽  
Control Strategies ◽  
Trichuris Trichiura ◽  
Hookworm Infection ◽  
Simultaneous Control ◽  
Precise Locality ◽  
Combined Control ◽  
Multiple Species ◽  
Epidemiological Characteristics ◽  
Hookworm Infections

Programmes to control Ascaris lumbricoides, Trichuris trichiura and hookworm infections have often been targeted at each infection separately, but the advent of benign and broad-spectrum anthelmintics suggests that combined control ma be feasible. The extent to which the infections co-occur in communities will determine the need for, and potential benefits of, such a combined approach. This paper examines the comparative distribution of the three geohelminths in different geographical areas and shows that A. lumbricoides and T. trichiura have closely related distributions, while hookworm infection is largely independent of the other two. These results indicate that many communities are at risk of disease from infection by more than one species of helminth. The similar distributions and epidemiological characteristics of A. lumbricoides and T. trichiura suggest that simultaneous control of these two parasites by the same strategy would be feasible and highly beneficial to communities. Multiple species control strategies which aim to control hookworm infection may require a more complicated protocol with more precise locality targeting.

EPIDEMIOLOGY, ECOLOGY AND PREVALENCE OF SOIL TRANSMITTED HELMINTHS FROM KOSHI REGION OF NORTH BIHAR.

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
LAKSHMI CHOUDHARY ◽  
PRABHAWATI PRABHAWATI
Keyword(s):  
Relative Humidity ◽  
Ascaris Lumbricoides ◽  
Rainy Season ◽  
Climatic Factors ◽  
Trichuris Trichiura ◽  
Hookworm Infection ◽  
Soil Transmitted Helminths ◽  
High Incidence ◽  
Apparently Healthy

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.

Associations among multiple geohelminth species infections in schoolchildren from Pemba Island

Parasitology ◽  
1998 ◽  
Vol 116 (1) ◽  
pp. 85-93 ◽  
Author(s):  
M. BOOTH ◽  
D. A. P. BUNDY ◽  
M. ALBONICO ◽  
H. M. CHWAYA ◽  
K. S. ALAWI ◽  
...  
Keyword(s):  
Detailed Analysis ◽  
Ascaris Lumbricoides ◽  
Population Biology ◽  
Single Species ◽  
Multiple Infections ◽  
Pemba Island ◽  
Potential Benefits ◽  
Multiple Species ◽  
Species Specific ◽  
Hookworm Infections

In order to estimate the potential benefits of interventions against multiple geohelminth species in endemic areas, an improved understanding of the population biology of multiple infections is required. This paper presents a detailed analysis of the associations among Ascaris lumbricoides, Trichuris trichiura and hookworm infections in 1539 schoolchildren on Pemba Island, Tanzania, where 58% of the sampled children carried infections of all 3 parasites at the time of the study. Infection intensities of different species were positively correlated, and individuals with single-species infections had generally lower species-specific egg counts than individuals with multiple-species infections. There was no age- or sex-related clustering of infections. A weak clustering of intense infections among individuals with multiple-species infections was observed, which became more pronounced as the threshold defining an intense infection increased for each species. The results suggest that individuals with multiple species infections are likely to be at highest risk of geohelminth-related morbidity, not only because of the number of infections they harbour, but also because they generally carry heavier infections of each species.

scholarly journals Prevalence, intensity and control strategies of soil-transmitted helminth infections among pre-school age children after 10 years of preventive chemotherapy in Gamo Gofa zone, Southern Ethiopia: A call for action

2020 ◽  
Author(s):  
Mekuria Asnakew Asfaw ◽  
Tigist Gezmu ◽  
Teklu Wegayehu ◽  
Alemayehu Bekele ◽  
Zeleke Hailemariam ◽  
...  
Keyword(s):  
Ascaris Lumbricoides ◽  
Control Strategies ◽  
Trichuris Trichiura ◽  
School Age Children ◽  
Moderate Intensity ◽  
School Age ◽  
Preventive Chemotherapy ◽  
And Control ◽  
Dug Well ◽  
Gamo Gofa

Background: Soil-transmitted helminths (STH) (Ascaris lumbricoides, Trichuris trichiura and hookworm) are among the most prevalent neglected tropical diseases (NTDs) in Ethiopia. Pre-school age children (PSAC) pay high morbidity toll associated with STH infections. Site specific operational evidence is lacking on prevalence, intensity and control strategies of STH among PSAC in Ethiopia. This study is, therefore, aimed to fill that missing knowledge gap. Methods: We did a community-based cross-sectional study in five districts of Gamo Gofa zone; from December 2018 to January 2019. Data were collected using pre-tested questionnaire, and the Kato-Katz technique was used to diagnose parasites egg in stool. Then data were edited, coded and entered into EpiData 4.4.2, and exported to SPSS software (IBM, version 25) for analysis. Results: A total of 2462 PSAC participated in this study. Overall, the prevalence of STH was 23.5% (578/2462). Ascaris lumbricoides was the most prevalent, 18.6% (457/2462), followed by Trichuris trichiura, 9.2% (226/2462), and hookworm, 3.1% (76/2462). The prevalence of STH in Chencha, Dita, Deremalo, Bonke and Demba Gofa districts were 33.8% (210/622), 26.4% (109/413), 21.3% (88/414), 20.6% (128/621), and 11% (43/392), respectively. Of the total, 7.4% (181/2462) PSAC were infected with two STH species. Ascaris lumbricodes infections had moderate intensity (15%), and the rest had low infections intensity. It is found that 68.7% of PSAC were treated with Albendazole. This study also revealed households level data as, 39.4% used water from hand-dug well, 52.5% of need to move ≥30minutes to collect water, 77.5% did not treat water, and 48.9% not had hand washing facility. Conclusion: This study showed that a significant proportion of pre-school age children are suffering from STH infections across districts in the study area despite preventive chemotherapy distribution for more than 10 years. Further, gaps in control strategies of STH were highlighted, which calls for action.

scholarly journals Avaliação da contaminação experimental de areias de praias por enteroparasitas: pesquisa de ovos de Helmintos

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

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.

scholarly journals Um estudo sôbre a eosinofilia nas helmintoses

1968 ◽  
Vol 2 (4) ◽  
pp. 169-214 ◽  
Author(s):  
Ruy Gomes de Moraes
Keyword(s):  
Schistosoma Mansoni ◽  
Ascaris Lumbricoides ◽  
Rio De Janeiro ◽  
Taenia Solium ◽  
Strongyloides Stercoralis ◽  
Trichuris Trichiura ◽  
Enterobius Vermicularis ◽  
Hymenolepis Nana ◽  
Necator Americanus ◽  
Ancylostoma Duodenale

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.

scholarly journals Nutritional status of soil-transmitted helminthiasis-infected and uninfected children

2015 ◽  
Vol 55 (3) ◽  
pp. 136 ◽  
Author(s):  
Nelly Simarmata ◽  
Tiangsa Sembiring ◽  
Muhammad Ali
Keyword(s):  
Nutritional Status ◽  
Ascaris Lumbricoides ◽  
Rural Areas ◽  
Primary Schools ◽  
Infection Intensity ◽  
Public Health Problem ◽  
Trichuris Trichiura ◽  
Cross Sectional ◽  
Malnourished Children ◽  
Moderate Malnutrition

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.

scholarly journals Risk factors of soil transmitted helminth infection among primary school students

2020 ◽  
Vol 11 (2) ◽  
pp. 126-132
Author(s):  
I Gede Gita Sastrawan ◽  
Jordaniel Setiabudi ◽  
Ni Putu Sanjiwani ◽  
Ni Komang Indriyani ◽  
Dewa Ayu Laksemi
Keyword(s):  
Risk Factors ◽  
Primary School ◽  
Ascaris Lumbricoides ◽  
Trichuris Trichiura ◽  
Personal Hygiene ◽  
Stool Examination ◽  
Primary School Students ◽  
School Students ◽  
Chi Square ◽  
Factors Associated

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

scholarly journals Novel Antibiofilm Non-Biocidal Strategies

2021 ◽  
pp. 117-136
Author(s):  
Francesca Cappitelli ◽  
Federica Villa
Keyword(s):  
Control Strategies ◽  
Model Systems ◽  
Negative Effects ◽  
Alternative Strategies ◽  
Biofilm Model ◽  
Biocidal Products ◽  
Multiple Species ◽  
Cultural Heritage Objects ◽  
And Control ◽  
By Products

AbstractSubaerial biofilm (SAB) formation on cultural heritage objects is often considered an undesirable process in which microorganisms and their by-products, e.g., enzymes and pigments, cause damage or alteration to a surface. Since biofilms are widespread phenomena, there has been a high demand for preventive and control strategies that resist their formation or reduce their negative effects once formed. Up to date, the main strategy to control biofilms has been the use of biocides. Because of their intrinsic properties, biocidal products can pose risks to humans, animals, and the environment. In this chapter, the authors call “green” only those alternative strategies to biocides able to prevent/control biofilms but that do not kill microorganisms, i.e., irrespective of the use of natural compounds. Here, we describe some of the methods that are most commonly used to test the effectiveness of antibiofilm compounds with multiple-species biofilm model systems. A unified terminology and well described protocols and guidelines are still required to compare and test the effectiveness of traditional or novel compounds against biofilms retrieved on heritage surfaces.

scholarly journals EOSINOPHILIA AS A PREDICTOR MORBIDITY OF SOIL- TRANSMITTED HELMINTHIASES AMONG WIDODAREN PLANTATION WORKERS IN JEMBER

2019 ◽  
Vol 3 (2) ◽  
pp. 47
Author(s):  
Aditya Primadana ◽  
Yudha Nurdian ◽  
Dini Agustina ◽  
Bagus Hermansyah ◽  
Yunita Armiyanti
Keyword(s):  
Mixed Infection ◽  
Ascaris Lumbricoides ◽  
Analytical Study ◽  
Blood Smear ◽  
Infection Intensity ◽  
Neglected Tropical Disease ◽  
Hookworm Infection ◽  
Weak Correlation ◽  
Smear Examination ◽  
Blood Smear Examination

Background: Helminthiasis is a neglected tropical disease and still remain a health problem in tropical and sub-tropical countries, including Indonesia. According to WHO, approximately 1,5 billion people or 24% of the world’s population, are infected with Soil-Transmitted Helminth (STH). Morbidity is directly related to the intensity of STH infestation. Some of the studies shown a significant correlation between eosinophilia and helminthiasis. Eosinophilia on the blood smear examination may be used as a marker of STH infestation. Purpose: to determine the correlation between Soil-Transmitted Helminthiases and eosinophilia as a predictor of morbidity of STH infestation among Widodaren Plantation Workers in Jember. Methods: This observational analytical study use the Kato-Katz method to determine infestation of STH and its intensity measured by egg count per gram stool (EPG). Blood smear examination stained with Giemsa conduct to determine eosinophil count. Results: Prevalence of STH infestation was 22,7% (15/66). Ascaris lumbricoides infection was 13,6% (9/66) and Hookworm infection was 4,5% (3/66). There is mixed infection between A. lumbricoides and Hookworm, the prevalence was 4,5%% (3/66). All of the infection intensity was light. The prevalence of eosinophilia was 27,2% (18/66). There was a significant correlation between STH infection and eosinophilia (P=0,000) but, there was a very weak correlation between the intensity of STH infection and eosinophilia (r=0,281; p=0,258). Conclusion: The prevalence of STH infection among Widodaren Plantation Workers is 22,7% and predominated by A. lumbriocides. There is a positive correlation between intensity of STH infection and eosinophilia as predictor morbidity of STH infection with very weak power.

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