Sixto Raul Costamagna

Sixto Raul Costamagna
National Scientific and Technical Research Council | conicet · Departamento de Biología

PhD and MSc and Biochemistry

About

56
Publications
9,459
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323
Citations
Citations since 2016
3 Research Items
106 Citations
201620172018201920202021202205101520
201620172018201920202021202205101520
201620172018201920202021202205101520
201620172018201920202021202205101520
Introduction
Amebas de Vida Libre: Acanthamoeba, Naegleria, Balamuthia

Publications

Publications (56)
Article
Full-text available
Reproductive losses linked to an infectious etiology in bovine cattle are a major economic concern worldwide. In Argentina, more than 50% of abortion cases have unknown causes. Species belonging to Chlamydiaceae family are frequent etiologic agents of abortion around the world; however, there is yet no information on their prevalence in Argentina....
Article
Full-text available
Free-living Amoebae of Acanthamoeba genus include non-pathogenic and pathogenic strains that are currently classified in 18 different genotypes, T1-T18. In this study, a survey was carried out to evaluate the presence of Acanthamoeba strains inwatering trough sample in La Pampa province, Argentina. Sample were inoculated onto non-nutrient agar plat...
Conference Paper
Full-text available
Las enfermedades producidas por parásitos en el hombre, se denominan “desatendidas” como una manera de expresar que no se las trata, ni se les presta la debida atención. Razones hay varias, fundamentalmente porque están ligadas a la pobreza, el hambre y la desnutrición, la falta de agua y viviendas dignas con desechos cloacales adecuados. Son escas...
Article
Full-text available
The objectives of this research were: (1) to determine the occurrence of zoonotic enteroparasites in dog feces from Bahía Blanca, Argentina; (2) to characterize the spatial distribution of the parasites found in association with the quality of life index (QLI) in neighborhoods of Bahía Blanca; and (3) to determine if the presence of a particular pa...
Article
Full-text available
Se estudió la asociación entre infestación, parámetros de laboratorio y signos clínicos en personas expuestas a infestación por Trichinella spiralis durante un brote de trichinellosis en el sudoeste de la provincia de Buenos Aires, Argentina. Asimismo, se investigó el grado de concordancia entre las pruebas inmunoserológicas más comúnmente utilizad...
Article
Full-text available
The association between infestation, laboratory parameters and clinical signs was investigated in human patients exposed to Trichinella spiralis during an outbreak of human trichinellosis in southwest Buenos Aires province, Argentina. The degree of agreement between immunoserological tests commonly used for diagnosis of human trichinellosis was det...
Article
Full-text available
Dipetalogaster maxima (Uhler, 1894) is a species typical of the south of the Baja Californa peninsula, Mexico. The adaptability of Argentine strains of Trypanosoma cruzi to vectors of other latitudes could be of relevance to epidemiology as well as to xenodiagnosis. The purpose of the present study was thus to investigate whether or not there is go...
Article
Full-text available
El objetivo de este estudio fue determinar el efecto de diferentes temperaturas sobre la viabilidad de larvas libres y enquistadas de Trichinella spiralis aisladas en el sudoeste de la provincia de Buenos Aires, Argentina. Se trataron larvas libres y enquistadas a diferentes temperaturas (-30 °C, -20 °C, 4 °C, 20 °C, calentamiento gradual entre 0-1...
Article
Full-text available
Acanthamoeba ha sido aislada de numerosos hábitats incluyendo piletas de natación. Estudiar su distribución es importante ya que algunas especies causan enfermedad en el hombre. El objetivo del presente trabajo fue la búsqueda, aislamiento y caracterización de protozoos del género Acanthamoeba en piscinas cubiertas de la ciudad de Bahía Blanca, Arg...
Article
Full-text available
The aim of this work was to study the effect of temperature on the viability of free and encysted larvae of Trichinella spiralis from southwest Buenos Aires province, Argentina. Larvae were treated at variable temperatures (-30 °C, -20 °C, 4 °C, 20 °C, gradual heating between 0-100 °C). The time necessary to kill 100 % of larvae was calculated. Dur...
Article
Acanthamoeba spp. has been isolated from many habitats, including swimming pools. Investigations on its distribution are relevant because many of its species cause human diseases. The aim of the present work was to investigate, isolate and characterize protozoan of the genus Acanthamoeba from indoor swimming pools in Bahía Blanca, Argentina, in the...
Article
Full-text available
This study presents findings on the protozoan Acanthamoeba in relation to its morphology, laboratory diagnosis, pathology in man, ecoepidemiological aspects and resistance to chlorine. Acanthamoeba was isolated from household water tanks (28.6%), from indoor swimming pools (71%), from the totality of samples collected from the Arroyo Napostá which...
Article
Full-text available
El objetivo de la presente investigación fue determinar si la coloración con azul de metileno, de probada utilidad para demostrar la viabilidad de protoescólices de Echinococcus granulosus, puede evidenciar también la viabilidad de larvas libres de Trichinella spiralis. Para ello se utilizaron tres suspensiones de larvas de T. spiralis (M1, M2 y M3...
Article
Algunas especies del género Acanthamoeba provocan queratitis amebiana (QA), una infección de la córnea muy dolorosa, generalmente unilateral, con compromiso importante de la visión. Se presenta el caso de una mujer de 31 años usuaria de lentes de contacto con hábitos inadecuados de higiene y conservación de las lentes. La paciente consultó por enro...
Article
Full-text available
The present research was carried out with the purpose of determining whether or not the methylene blue test could also evidence viability of free larvae of Trichinella spiralis, taking into account its usefulness in the determination of viability of protoscolices in Echinococcus granulosus. To this end, three T. spiralis larval suspensions (M1, M2...
Article
Some species of the Acanthamoeba genus cause keratitis, a very painful, most likely unilateral corneal infection , associated with eye and vision impairment. We here present a case of a 31-year-old female patient, a regular user of soft contact lenses without good practices of lens hygiene and handling. The patient attended medical consultation aft...
Article
Full-text available
COMPARISON OF THE EFFECT OF ORAL ADMINISTRATION OF TWO PROBIOTICS ON TRICHINELLA SPIRALIS INFECTED MICE The aim of the present work was at determine whether the oral administration of Lactobacillus casei and Kefi r of milk exerts adverse effects on Trichinella spiralis-infected mice. Fifteen BALB/c mice were divided into three even groups: Control...
Article
Full-text available
Se entiende por miasis a la infestación de vertebrados vivos por larvas de dípteros, que por lo menos durante un corto período, se alimentan de los tejidos vivos o muertos del hospedador, de sus sustancias corporales líquidas o del alimento por él ingerido. El objetivo del presente trabajo fue determinar las especies bioagentes de miasis humanas oc...
Article
Full-text available
Myiasis is the infestation of live human and vertebrate animals with dipterous larvae which, at least for a short period, feed on the host's dead or living tissue, liquid body-substance, or ingested food. The objective of this study was to identify the flies producing myiasis in Bahía Blanca city, Argentina, from 01/03/2000 to 31/05/2005. Seventeen...
Article
Full-text available
This descriptive epidemiological research studies the prevalence of intestinal parasites in 221 children attending school in Mendoza, Argentina, and living in an urban area with potable water and complete sanitary system. Samples of faeces were collected and kept in a sodium acetate-acetic acid-formalin (SAF) solution during 7 days and anal mucus w...
Article
This descriptive epidemiological research studies the prevalence of intestinal parasites in 221 children attending school in Mendoza, Argentina, and living in an urban area with potable water and complete sanitary system. Samples of faeces were collected and kept in a sodium acetate-acetic acid-formalin (SAF) solution during 7 days and anal mucus w...
Article
Full-text available
Resumo This study aims at determining whether or not the oral administration of Lactobacillus casei exerts adverse effects on Trichinella spiralis (strain BBSC 01)-infected BALB/c mice. Ten mice previously divided into Control Group “C” and Treated Group “T” were used. Group C was fed with a regular diet during 7 days before T. spiralis infection....
Article
Resumen Contributions to the knowledge of diptera cyclorrapha in the urban area of Bahia Blanca (Buenos Aires province ), Argentina. The group of insects commonly designated as «flies» corresponds roughly to the Cyclorrapha (Diptera: Brachycera). These insects are important for medical and sanitary reasons, since some species can carry diseases by...
Article
Full-text available
Se estudió el desarrollo post-embrionario de Microcerella acrydiorum (Weyenbergh) bajo condiciones controladas (temperatura media: 27,50 ± 2,60 ° C, humedad relativa media: 36,47 ± 8,10% y fotoperíodo artificial: 14 horas luz) y se determinaron los siguientes parámetros biológicos: tiempo de desarrollo larval y pupal, período de prelarviposición, s...
Article
Full-text available
The aim of the present study was to detect the presence of sanitarily important parasites in the water from Arroyo Napostá as well as in the water used for recreational purposes (public swimming-pools) and for consumption in the city of Bahía Blanca, province of Buenos Aires, Argentina. To this end, 24,000 liters of water from different sectors of...
Article
Full-text available
The aim of the present study was to detect the presence of sanitarily important parasites in the water from Arroyo Napostá as well as in the water used for recreational purposes (public swimming-pools) and for consumption in the city of Bahía Blanca, province of Buenos Aires, Argentina. To this end, 24,000 liters of water from different sectors of...
Article
Full-text available
The geometrical patterns of egg cells of Triatoma patagonica Del Ponte, 1929, a species considered to be an active vector of Chagas' disease, were studied by scanning electron microscopy (SEM). Eggs of known age were selected according to their morphological characteristics, namely those which were 5 days old, 14 days old, and those which were hatc...
Article
Full-text available
El diagnóstico de laboratorio del parásito Trichomonas vaginalis, sigue siendo objeto de nuevos estudios. Así, Mendez y col., sugieren la utilización de un fijador-colorante con azul de metileno para el diagnóstico directo de este flagelado. En el presente trabajo se efectuó la validación de la mencionada propuesta frente al examen en fresco. Se an...
Article
Trichomonas vaginalis laboratory diagnosis is still the focus of attention of several research studies. Mendez et al have proposed a staining-fixing technique for the wet mount examination of this flagellate. The purpose of the present study is to examine the validity of such proposal against the conventional wet mount examination. For this purpose...
Article
Full-text available
The aim of the present investigation was to identify the fly producing myiasis in a patient with pediculosis. The patient was a ten-year-old girl with a severe Pediculus capitis infestation and a lesion with four holes on her head containing larvae. Examination of these larvae revealed that they were Cochliomyia hominivorax. This is another clinica...
Article
Full-text available
The aim of the present investigation was to identify the fly producing myiasis in a patient with pediculosis. The patient was a male adult with a severe Pediculus humanus capitis' infestation and a lesion on his head containing larvae. Examination of these larvae revealed that they were Cochliomyia hominivorax. In this clinical case, the post-scrat...
Article
Full-text available
The aim of the present investigation was to identify the fly producing myiasis in a patient with pediculosis. The patient was a male adult with a severe Pediculus humanus capitis' infestation and a lesion on his head containing larvae. Examination of these larvae revealed that they were Cochliomyia hominivorax. In this clinical case, the post-scrat...
Article
The purpose of this research is to carry out an epidemiological characterization of the different types of parasitosis detected in the city of Bahía Blanca (Argentina) (1994 to 1999). To this end, the prevalence of: enteroparasitosis, trichomonosis, toxoplasmosis, Chagas disease, malaria, hydatidosis, toxocarosis, cysticercosis, and trichinellosis...
Article
The present study has been carried out on cases and controls in order to evaluate the importance of Demodex sp. in dermatology. A chemical analysis of parasites has complemented this study. Cases included patients suffering from rosacea or seborheic eccematide while controls included those who had normal skin. Samples were extracted from the face (...
Article
Full-text available
The present study has been carried out on cases and controls in order to evaluate the importance of Demodex sp. in dermatology. A chemical analysis of parasites has complemented this study. Cases included patients suffering from rosacea or seborheic eccematide while controls included those who had normal skin. Samples were extracted from the face (...
Article
Full-text available
This paper is focused on the study of the ultrastructure of Trichomonas vaginalis in liquid cultures. Its cytoskeleton, the morphology of its hydrogenosomes, and endocytosis phenomena have been observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). For the present study, the traditional techniques for SEM and TEM...
Article
The goal of the present study was to determine the validity of the following five methods used for the diagnosis of Trichomonas vaginalis in vaginal secretions at the clinical laboratory: Gram staining; Conventional wet mount examination; May Grunwald-Giemsa staining; Culture in a modified Diamond (Menarini®) medium; Culture in an OXOID® CM 161 med...
Article
The present study examined the validity of PAP staining, as used for vaginal cytology, against fluorescent staining with acridine orange in order to determine the value of a negative result of Trichomonas vaginalis obtained by a PAP smear. We examined eighty vaginal-secretion samples from 18- to 45-year-old female patients of the Hospital Municipal...
Article
ENTEROPARASITES IN CHILDREN LIVING IN RURAL AREAS AT THE PARTIDO DE CARMEN DE PATAGONES. PROVINCE OF BUENOS AIRES.ARGENTINA In the absence of epidemiological data on enteroparasites in a population of 0-14 year-old residents in the rural area of Partido de Carmen de Patagones, Province of Buenos Aires, Argentina, a descriptive and epidemiologic stu...
Article
Full-text available
Diagnostic and parasite characterization and identification studies were carried out in human patients with cutaneous leishmaniasis lesions in Santiago del Estero, Northern Province of Argentina. Diagnostic procedures were biopsies of lesions for smears and inoculations in hamster, needle aspirations of material from ulcers for "in vitro" cultures....

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Project
Acanthamoeba: endosimbiontes Trichinellosis: Biology