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Ferreira IB, Garcia IS, Lima MLF, da Silva RC, Santarém VA. Evaluation of heating and liming treatments in sand samples artificially contaminated with Ancylostoma spp. eggs. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA = BRAZILIAN JOURNAL OF VETERINARY PARASITOLOGY : ORGAO OFICIAL DO COLEGIO BRASILEIRO DE PARASITOLOGIA VETERINARIA 2024; 33:e002124. [PMID: 38896755 PMCID: PMC11253820 DOI: 10.1590/s1984-29612024032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 04/16/2024] [Indexed: 06/21/2024]
Abstract
Ancylostoma spp. are found worldwide. Infected dog and cat feces can contaminate soil in public places. Despite prophylactic measures being available, studies on direct remediation of Ancylostoma-contaminated soils are scarce. This study aimed to determine the impact of heat treatment and liming on the viability of Ancylostoma spp. eggs in artificially contaminated sandy soil. Sterilized sand samples were contaminated with Ancylostoma spp. eggs extracted from infected dogs' feces. Samples were heated (trial I) to 70 °C or 80 °C, then sieved after 24 hours (212, 90, 38, and 25 µm). Larval cultures were assessed for larval development following heat treatment. Five quicklime concentrations (trial II; 50, 30, 20, 10 and 5%) were used to treat sand. The effect of liming on larval cultures was assessed by measuring embryonic development. Filariform larvae were exposed to 20% quicklime (25 °C and 37 °C, 20 min). Heat treatment destroys Ancylostoma spp. eggs and prevents in vitro larval development. Liming at 50, 30, and 20% concentrations made embryonic development impossible. However, filariform larvae treated with 20% lime solution retained their motility. Heating at 70 °C and liming at 20% were sufficient to make Ancylostoma spp. egg embryogenesis impossible in experimentally contaminated sand samples.
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Affiliation(s)
- Isabella Braghin Ferreira
- Laboratório de Parasitologia Veterinária, Hospital Universitário Veterinário, Universidade do Oeste Paulista – UNOESTE, Presidente Prudente, SP, Brasil
| | - Isabele Santos Garcia
- Laboratório de Parasitologia Veterinária, Hospital Universitário Veterinário, Universidade do Oeste Paulista – UNOESTE, Presidente Prudente, SP, Brasil
| | - Maria Linda Ferreira Lima
- Faculdade de Pós-graduação em Zootecnia, Universidade do Oeste Paulista – UNOESTE, Presidente Prudente, SP, Brasil
| | - Rodrigo Costa da Silva
- Laboratório de Parasitologia Veterinária, Hospital Universitário Veterinário, Universidade do Oeste Paulista – UNOESTE, Presidente Prudente, SP, Brasil
| | - Vamilton Alvares Santarém
- Laboratório de Parasitologia Veterinária, Hospital Universitário Veterinário, Universidade do Oeste Paulista – UNOESTE, Presidente Prudente, SP, Brasil
- Faculdade de Pós-graduação em Zootecnia, Universidade do Oeste Paulista – UNOESTE, Presidente Prudente, SP, Brasil
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Gastrointestinal helminths in dogs: occurrence, risk factors, and multiple antiparasitic drug resistance. Parasitol Res 2022; 121:2579-2586. [PMID: 35867158 DOI: 10.1007/s00436-022-07599-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 07/10/2022] [Indexed: 10/17/2022]
Abstract
Helminth infections are detrimental to the overall health of dogs; therefore, this study aimed to identify antiparasitic-resistant helminths and evaluate the infection rate and risk factors for parasitism in canines. For this purpose, a parasitological evaluation of 38 randomly selected animals was performed, followed by the evaluation of the anthelminthic efficacy of three drugs: pyrantel pamoate with praziquantel (Canex Composto®), fenbendazole (Fenzol Pet®), and milbemycin oxime with praziquantel (Milbemax C®). Among the evaluated animals, 22/38 (57.89%) tested negative and 16/38 (42.71%) tested positive for Ancylostoma caninum infection. Evaluation of the efficacy of antiparasitic drugs showed that 12/16 (75%) dogs were infected with helminths that were susceptible to pyrantel pamoate with praziquantel. Among those for which pyrantel pamoate with praziquantel was not effective, 3/4 (75%) were susceptible to fenbendazole, while the remaining case resistant to both pyrantel pamoate with praziquantel and fenbendazole was sensitive to milbemycin oxime with praziquantel (100%). The odds ratio of infection in dogs inhabiting environments containing soil or grass was 6.67 times higher than that in dogs inhabiting impermeable environments. Mixed-breed dogs (SRD) were 6.54 times more likely to be infected compared to purebred dogs. A. caninum resistant to pyrantel pamoate with praziquantel (4/16, 25%) and fenbendazole (1/4, 25%) were detected. The results of this study demonstrated the importance of coproparasitological monitoring by professionals before and after treatments to assess antiparasitic drug effectiveness, ensure animal health and welfare, and minimize animal exposure to risk factors.
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Abstract
I herein review published studies reporting the prevalence of Toxocara infection in dogs and cats in Brazil. Based on data gathered from faecal examinations of approximately 38,940 dogs and 5600 cats from different Brazilian studies, the mean prevalence of Toxocara infection is 11.4% (range: 0.7-48.9%) in dogs and 16.7% (0.3-43.1%) in cats. These mean values based on faecal examinations should be interpreted with cautious, considering the obvious differences in terms of sample size, diagnostic tests and animal populations. Accordingly, necropsy investigations reveal higher mean prevalence values (21.9% for Toxocara canis and 27.6% Toxocara cati in dogs and cats, respectively). The contamination with Toxocara eggs in different environments and the significance of these parasites from a public health perspective in Brazil are briefly discussed.
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Affiliation(s)
- Filipe Dantas-Torres
- Department of Immunology, Aggeu Magalhães Institute, Oswaldo Cruz Foundation (Fiocruz), Recife, Pernambuco, Brazil.
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Marques SR, Alves LC, Faustino MADG. Análise epistemológica dos conhecimentos científicos sobre Toxocara sp. com ênfase na infecção humana. CIENCIA & SAUDE COLETIVA 2019; 24:219-228. [DOI: 10.1590/1413-81232018241.20262016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 01/16/2017] [Indexed: 11/22/2022] Open
Abstract
Resumo Este artigo objetivou analisar a evolução do conhecimento sobre Toxocara sp. em seu aspecto zoonótico por meio de dados científicos entre os anos de 1996 a 2015 utilizando a epistemologia como ferramenta. A análise epistemológica da evolução do conhecimento sobre o aspecto zoonótico de Toxocara sp. no Brasil demonstrou que, de uma maneira geral, foram agregadas poucas novas informações as quais tiveram, ao longo do período estudado, absorção lenta, descontínua, e não foram inseridas na realidade social do ponto de vista de Saúde Pública.
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Mota KCP, Grama DF, Fava NMN, Úngari LP, Faria ESM, Cury MC. Distribution and risk factors of Ascarididae and other geohelminths in the soil of Uberlandia, Minas Gerais, Brazil. Rev Inst Med Trop Sao Paulo 2018; 60:e17. [PMID: 29694601 PMCID: PMC5956571 DOI: 10.1590/s1678-9946201860017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/31/2018] [Indexed: 11/21/2022] Open
Abstract
Among the geohelminths, parasites from the Ascarididae family have a significant
role in the human and animal health. This research aims to determine the
prevalence of Ascarididae species in the soil in different areas located in a
city of Minas Gerais State, Brazil (South America). The study was developed in
squares, parks, sports clubs, orchards and municipal children's schools. Samples
of sand/soil/grass were collected from January to August 2014. The optical
microscope screening was performed through formal-ether and spontaneous
sedimentation techniques. Out of the 183 collected samples, eight (4.4%)
belonged to parks, 16 (8.7%) to sports clubs, 76 (41.5%) to squares, 23 (12.6%)
to orchards, and 60 (32.8%) to schools. Out of the total, 28 (15.3%) contained
Ascarididae eggs. Higher levels of positivity were demonstrated in the raining
season (25.0%), in samples collected in the southern region of the town (25.1%),
on ground soils (27.3%). Twenty-three (12.6%) were detected by the formal-ether
sedimentation technique and 10 (5.5%) by spontaneous sedimentation technique.
Therefore, it was concluded that the soils in the city of Uberlandia are
contaminated with eggs and larvae of geohelminths, enabling dissemination of
illnesses among animals and human beings.
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Affiliation(s)
| | - Daliane Faria Grama
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - Natália M Nasser Fava
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - Letícia Pereira Úngari
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | | | - Márcia Cristina Cury
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Minas Gerais, Brazil
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Almeida IAD, Jeske S, Mesemburg MA, Berne MEA, Villela MM. Prevalence of and risk factors for intestinal parasite infections in pediatric patients admitted to public hospitals in Southern Brazil. Rev Soc Bras Med Trop 2018; 50:853-856. [PMID: 29340467 DOI: 10.1590/0037-8682-0116-2017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 08/24/2017] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION This study aimed to evaluate the prevalence of intestinal parasitosis and to identify risk factors associated therewith in hospitalized children. METHODS Three fecal samples from each patient were evaluated using three different techniques. The patients' nutritional and socioeconomic status and hematologic profiles were evaluated. RESULTS Of 106 children, 32.1% tested positive for intestinal parasitosis. The associated risk factors were low parental education levels and children's nail-biting habit. Eosinophilia, observed in 15 cases, was not associated with parasitosis. CONCLUSIONS We recommend routine fecal parasitologic examination for hospitalized children and implementation of educational campaigns on the prevention of these diseases.
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Affiliation(s)
- Isis Almeida de Almeida
- Programa de Pós-Graduação em Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas, Capão do Leão, RS, Brasil
| | - Sabrina Jeske
- Programa de Pós-Graduação em Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas, Capão do Leão, RS, Brasil
| | - Marília Arndt Mesemburg
- Programa de Pós-Graduação em Epidemiologia, Centro de Pesquisas Epidemiológicas, Universidade Federal de Pelotas, Pelotas, RS, Brasil
| | - Maria Elisabeth Aires Berne
- Programa de Pós-Graduação em Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas, Capão do Leão, RS, Brasil
| | - Marcos Marreiro Villela
- Programa de Pós-Graduação em Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas, Capão do Leão, RS, Brasil
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Gao X, Wang H, Li J, Qin H, Xiao J. Influence of land use and meteorological factors on the spatial distribution of Toxocara canis and Toxocara cati eggs in soil in urban areas. Vet Parasitol 2017; 233:80-85. [DOI: 10.1016/j.vetpar.2016.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 11/24/2016] [Accepted: 12/09/2016] [Indexed: 11/30/2022]
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Perera SC, Capella GDA, Pinto NB, Rappeti JCDS, Müller G, Azambuja RHM, Giordani C, Cleff MB. First isolation of Dioctophyme renale eggs from an urban environment and identification of those from animal urine. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2016; 26:89-91. [DOI: 10.1590/s1984-29612016064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 08/11/2016] [Indexed: 11/22/2022]
Abstract
Abstract Dioctophyme renale is a zoonotic parasite with worldwide distribution, although its occurrence is little known. The objective here was to evaluate the presence of parasite eggs in the environment and in the urine of dogs and cats in an urban area. Soil samples and urine were evaluated respectively by means of the Caldwell-Caldwell technique and urinalysis. Out of the 100 soil samples, 3% presented D. renale eggs, and out of the 43 urine samples, 18.6% were positive, including the feline samples. Thus, D. renale eggs are present in the urban environment, and dogs and cats are parasitized by this nematode, which therefore represents a risk to public health.
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Schoenardie ER, Scaini CJ, Pepe MS, Borsuk S, de Avila LFDC, Villela M, Berne MEA. Vertical transmission of Toxocara canis in successive generations of mice. ACTA ACUST UNITED AC 2015; 22:623-6. [PMID: 24473895 DOI: 10.1590/s1984-29612013000400030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 11/05/2013] [Indexed: 11/22/2022]
Abstract
Visceral toxocariasis is a neglected zoonosis caused by Toxocara canis larvae in unusual hosts. In dogs, the definitive host, the infection occurs mainly through transplacental and transcolostral transmission. Studies on experimental models have shown that vertical transmission may result from acute infections. Considering that toxocariasis is characterized as a chronic infection, with possible reactivation of larvae present in the brain, this study evaluated the presence of larvae in the brain of female BALB/c mice and their offspring with chronic infection during three successive pregnancies. ELISA-TES was used to evaluate the antibody levels. T. canis larvae were detected in the brain tissue of the mice during the three successive generations evaluated. The offspring's IgG level gradually decreased, and mean absorbance (ABS) above the cutoff point (0.070) was observed only at 30 (0.229) and 50 (0.096) days of age, while IgM was not detected. The infections in the offspring confirmed that vertical transmission of T. canis larvae occurred during chronic toxocariasis in three successive generations of mice.
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Affiliation(s)
- Elizandra Roselaine Schoenardie
- Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, PelotasRS, Brasil, Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, Pelotas, RS, Brasil
| | - Carlos James Scaini
- Programa de Pós-graduação em Ciências da Saúde, Universidade Federal do Rio Grande - FURG, Rio GrandeRS, Brasil, Programa de Pós-graduação em Ciências da Saúde, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brasil
| | - Michele Soares Pepe
- Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, PelotasRS, Brasil, Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, Pelotas, RS, Brasil
| | - Sibele Borsuk
- Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas - UFPEL, PelotasRS, Brasil, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas - UFPEL, Pelotas, RS, Brasil
| | - Luciana Farias da Costa de Avila
- Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, PelotasRS, Brasil, Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, Pelotas, RS, Brasil
| | - Marcos Villela
- Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, PelotasRS, Brasil, Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, Pelotas, RS, Brasil
| | - Maria Elisabeth Aires Berne
- Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, PelotasRS, Brasil, Departamento de Microbiologia e Parasitologia, Instituto de Biologia, Universidade Federal de Pelotas -UFPEL, Campus Capão do Leão, Pelotas, RS, Brasil
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Sprenger LK, Green KT, Molento MB. Geohelminth contamination of public areas and epidemiological risk factors in Curitiba, Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2014; 23:69-73. [DOI: 10.1590/s1984-29612014009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Accepted: 12/13/2013] [Indexed: 01/04/2023]
Abstract
This study aimed to investigate the frequency of geohelminthic contamination of public parks and squares in Curitiba, state of Paraná, Brazil, between August and December 2010. A total of 345 samples were collected from 69 sandboxes in different areas and were tested using the Faust, Lutz and Baermann parasitological techniques. Potential risk factors associated with soil contamination were also analyzed. A total of 36% of the samples (124/345) were positive for helminths and 65.2% of the areas (45/69) were classified as contaminated in one or more samples. The most commonly identified parasite eggs were Ancylostoma sp. (14.5%; 50/345); followed by Toxocara sp. (9.6%; 33/345) and the Strongyloidea superfamily (excluding hookworms) (2.3%; 8/345). The analysis on the epidemiological risk factors indicated that the presence of dogs and feces in the sandboxes increased the chances of contamination of the site. Use of fences had a protective positive impact that reduced soil contamination. Health education programs should be applied within the community to minimize the risk of human contact with dogs' feces. Use of fencing in these areas is highly recommended to prevent or reduce the users' contact with animal excrement.
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Dantas-Torres F, Otranto D. Dogs, cats, parasites, and humans in Brazil: opening the black box. Parasit Vectors 2014; 7:22. [PMID: 24423244 PMCID: PMC3914713 DOI: 10.1186/1756-3305-7-22] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 12/21/2013] [Indexed: 02/04/2023] Open
Abstract
Dogs and cats in Brazil serve as primary hosts for a considerable number of parasites, which may affect their health and wellbeing. These may include endoparasites (e.g., protozoa, cestodes, trematodes, and nematodes) and ectoparasites (i.e., fleas, lice, mites, and ticks). While some dog and cat parasites are highly host-specific (e.g., Aelurostrongylus abstrusus and Felicola subrostratus for cats, and Angiostrongylus vasorum and Trichodectes canis for dogs), others may easily switch to other hosts, including humans. In fact, several dog and cat parasites (e.g., Toxoplasma gondii, Dipylidium caninum, Ancylostoma caninum, Strongyloides stercoralis, and Toxocara canis) are important not only from a veterinary perspective but also from a medical standpoint. In addition, some of them (e.g., Lynxacarus radovskyi on cats and Rangelia vitalii in dogs) are little known to most veterinary practitioners working in Brazil. This article is a compendium on dog and cat parasites in Brazil and a call for a One Health approach towards a better management of some of these parasites, which may potentially affect humans. Practical aspects related to the diagnosis, treatment, and control of parasitic diseases of dogs and cats in Brazil are discussed.
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Affiliation(s)
- Filipe Dantas-Torres
- Department of Immunology, Aggeu Magalhães Research Centre, Oswaldo Cruz Foundation, Recife Pernambuco 50670420, Brazil.
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Santarém VA, Pereira VC, Alegre BCP. Contamination of public parks in Presidente Prudente (São Paulo, Brazil) by Toxocara spp. eggs. ACTA ACUST UNITED AC 2013; 21:323-5. [PMID: 23070451 DOI: 10.1590/s1984-29612012000300029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 03/20/2012] [Indexed: 11/21/2022]
Abstract
This study aims to evaluate soil contamination by Toxocara spp. eggs in public parks in Presidente Prudente, São Paulo, Brazil. Soil samples (500 g) were collected every month over a 12-month period, from 25 parks in different parts of the city (northern, southern, eastern, western and central areas). Two 10-g aliquots of the material collected from each park were subjected to the centrifuge-flotation method to recover Toxocara spp. eggs. Twenty-four out of the 25 squares studied (96.0%) were contaminated and the number of eggs recovered ranged from 1 to 398 per sample. Eggs were recovered all over the year. Despite the number being greater in autumn (p < 0.001), there was no correlation between number egg number and average monthly temperature (r = -0.492; p = 0.148) or between egg number and monthly rainfall (r = -0.299; p = 0.402). Park localization does not influence egg presence (p = 0.7116). Because of the high level of contamination of the parks by Toxocara spp. eggs, prevention of contamination of public areas by larva migrans agents is indicated.
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Affiliation(s)
- Vamilton Alvares Santarém
- Laboratory of Preventive Veterinary Medicine II (Animal Parasitology), Veterinary Teaching Hospital, Universidade do Oeste Paulista, Presidente Prudente, SP, Brazil.
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De Souza Maia Filho F, Nunes Vieira J, Aires Berne ME, Stoll FE, Da Silva Nascente P, Pötter L, Brayer Pereira DI. Fungal ovicidal activity on Toxocara canis eggs. Rev Iberoam Micol 2013; 30:226-30. [DOI: 10.1016/j.riam.2012.12.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 11/27/2012] [Accepted: 12/18/2012] [Indexed: 10/27/2022] Open
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Toxocara spp. seroprevalence in sheep from southern Brazil. Parasitol Res 2013; 112:3181-6. [DOI: 10.1007/s00436-013-3499-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 06/03/2013] [Indexed: 10/26/2022]
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Schoenardie ER, Scaini CJ, Brod CS, Pepe MS, Villela MM, McBride AJA, Borsuk S, Berne MEA. Seroprevalence ofToxocaraInfection in Children from Southern Brazil. J Parasitol 2013; 99:537-9. [DOI: 10.1645/ge-3182] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Trejo CAC, Romero Núñez C, García Contreras ADC, Mendoza Barrera GE. Soil contamination by Toxocara spp. eggs in a University in Mexico City. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2012; 21:298-300. [DOI: 10.1590/s1984-29612012000300022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Accepted: 11/25/2011] [Indexed: 11/22/2022]
Abstract
The contamination levels of Toxocara spp. eggs in soil samples from a university campus in Mexico City were evaluated and analysed according to garden size, and were related with the percentage of Toxocara spp. eggs and its viability according to the soil characteristics. A total of 1458 soil samples collected in 15 gardens (six large and nine small) were analysed by sedimentation-flotation with zinc sulphate solution on at 33%. Contamination was low (12.9%), and egg viability was high (65.5%). The size of the garden had no influence on the presence and viability of Toxocara spp. eggs. Contamination was negatively correlated with the percentage of vegetation (r = -0. 61, P < 0.01) and the viability was negatively associated with the percentage of clay in the soil samples (r = -0.51, P < 0.04). The size of the garden did not influence the presence and viability of Toxocara spp. eggs.
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