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1.
Rev Peru Med Exp Salud Publica ; 40(1): 94-98, 2023.
Article in Spanish, English | MEDLINE | ID: mdl-37377243

ABSTRACT

We present a case of disseminated cutaneous leishmaniasis with extensive manifestation in a pediatric patient with Down syndrome. The case was confirmed by parasitological and immunological tests. The species was identified as Leishmania (Viannia) braziliensis by polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLP). The immune deficit that occurs as part of Down syndrome may have been the reason for the aggressive and prolonged clinical manifestations as well as the poor response to stibogluconate and deoxycholate amphotericin. The patient was treated with liposomal amphotericin B and at the end of therapy, showed clinical improvement of the lesions. This report highlights the challenges of the diagnosis and treatment of cutaneous leishmaniasis in immunosuppressed pediatric patients, especially under difficult social, economic and geographic conditions. Leishmaniasis should be considered as a differential diagnosis when treating atypical chronic dermatologic ulcers; the use of liposomal amphotericin in immunocompromised patients should also be considered in these cases.


Se presenta un caso de leishmaniasis selvática cutánea diseminada con manifestación extensa en una paciente pediátrica con síndrome de Down. El caso se confirmó a través de estudios parasitológicos e inmunológicos, mientras que la identificación se realizó mediante la técnica de reacción en cadena de la polimerasa-polimorfismos de longitud de fragmentos de restricción (PCR-RFLP, por sus siglas en inglés), determinándose la especie como Leishmania (Viannia) braziliensis. La manifestación clínica agresiva y prolongada con poca respuesta a estibogluconato y anfotericina desoxicolato pueden deberse al déficit inmunológico que se presenta como parte del síndrome de Down. La paciente eventualmente recibió tratamiento con anfotericina B liposomal y al término de la terapia, mostró mejoría clínica de las lesiones. El presente reporte ilustra los desafíos tanto de diagnóstico como tratamiento de leishmaniasis cutánea en pacientes pediátricos inmunosuprimidos, especialmente en un entorno de difícil acceso social, económico y geográfico, a los servicios de salud. Se recomienda considerar a la leishmaniasis en el diagnóstico diferencial cuando se atienda ulceras crónicas dermatológicas atípicas; así como tener en cuenta el uso de anfotericina liposomal en pacientes inmunocomprometidos.


Subject(s)
Antiprotozoal Agents , Down Syndrome , Leishmania braziliensis , Leishmaniasis, Cutaneous , Humans , Child , Amphotericin B/therapeutic use , Antiprotozoal Agents/therapeutic use , Down Syndrome/complications , Down Syndrome/drug therapy , Leishmaniasis, Cutaneous/diagnosis , Leishmaniasis, Cutaneous/drug therapy , Leishmaniasis, Cutaneous/pathology
2.
Article in Spanish | LILACS | ID: biblio-1442125

ABSTRACT

Se presenta un caso de leishmaniasis selvática cutánea diseminada con manifestación extensa en una paciente pediátrica con síndrome de Down. El caso se confirmó a través de estudios parasitológicos e inmunológicos, mientras que la identificación se realizó mediante la técnica de reacción en cadena de la polimerasa-polimorfismos de longitud de fragmentos de restricción (PCR-RFLP, por sus siglas en inglés), determinándose la especie como Leishmania (Viannia) braziliensis. La manifestación clínica agresiva y prolongada con poca respuesta a estibogluconato y anfotericina desoxicolato pueden deberse al déficit inmunológico que se presenta como parte del síndrome de Down. La paciente eventualmente recibió tratamiento con anfotericina B liposomal y al término de la terapia, mostró mejoría clínica de las lesiones. El presente reporte ilustra los desafíos tanto de diagnóstico como tratamiento de leishmaniasis cutánea en pacientes pediátricos inmunosuprimidos, especialmente en un entorno de difícil acceso social, económico y geográfico, a los servicios de salud. Se recomienda considerar a la leishmaniasis en el diagnóstico diferencial cuando se atienda ulceras crónicas dermatológicas atípicas; así como tener en cuenta el uso de anfotericina liposomal en pacientes inmunocomprometidos.


We present a case of disseminated cutaneous leishmaniasis with extensive manifestation in a pediatric patient with Down syndrome. The case was confirmed by parasitological and immunological tests. The species was identified as Leishmania (Viannia) braziliensis by polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLP). The immune deficit that occurs as part of Down syndrome may have been the reason for the aggressive and prolonged clinical manifestations as well as the poor response to stibogluconate and deoxycholate amphotericin. The patient was treated with liposomal amphotericin B and at the end of therapy, showed clinical improvement of the lesions. This report highlights the challenges of the diagnosis and treatment of cutaneous leishmaniasis in immunosuppressed pediatric patients, especially under difficult social, economic and geographic conditions. Leishmaniasis should be considered as a differential diagnosis when treating atypical chronic dermatologic ulcers; the use of liposomal amphotericin in immunocompromised patients should also be considered in these cases.


Subject(s)
Humans , Female , Child, Preschool , Child
3.
Rev Peru Med Exp Salud Publica ; 37(3): 462-470, 2020 Dec 02.
Article in Spanish, English | MEDLINE | ID: mdl-33295548

ABSTRACT

OBJECTIVES: To evaluate the in vitro photodynamic activity of aluminum phthalocyanine tetrasulfonate chloride (AlPcClS4) on promastigotes and amastigotes of Leishmania (Viannia) peruviana and Leishmania (Viannia) braziliensis. MATERIALS AND METHODS: The activity of photodynamic therapy using AlPcClS4 on Leishmania promastigote and amastigotes was determined by the Methyl Thiazole Tetrazolium (MTT) colorimetric method and quantitative PCR, respectively. RESULTS: Photodynamic treatment showed an inhibitory effect on promastigotes, particularly on Leishmania (V.) peruviana, to a lesser extent on Leishmania (V.) braziliensis and also on intracellular forms of both species. At 24 hours post-radiation, using concentrations of 200 µM and 350 µM, the inhibitory effect on Leishmania (V.) peruviana was 72.9% and 73.9% respectively; at 96 hours the inhibitory effect was of 78.8% and 80.6%, respectively. Regarding intracellular forms, the inhibitory effect on Leishmania (V.) peruviana amastigotes was 57.8% at 72 hours post-treatment, using a concentration of 200 µM. The IC50 was 56.5, 50, 44 and 39.7 µM, at 24, 48, 72 and 96 hours post-radiation, respectively. CONCLUSIONS: Photodynamic therapy using AlPcClS4 against Leishmania species showed encouraging results, mainly on Leishmania (V.) peruviana, suggesting a potential use as an alternative or complement to the usual treatment of tegumentary leishmaniasis. However, new trials are still required to determine the selectivity index for the intracellular form of the parasite, and to develop methods to facilitate the efficient entry of the molecule into the host cell and the parasite.


OBJETIVOS: Evaluar la actividad fotodinámica in vitro de la ftalocianina de aluminio tetrasulfonada clorada (AlPcClS4) sobre promastigotes y amastigotes de Leishmania (Viannia) peruviana y Leishmania (Viannia) braziliensis. MATERIALES Y MÉTODOS: La actividad del tratamiento fotodinámico empleando AlPcClS4 sobre promastigotes y amastigotes de Leishmania fue determinada mediante el método colorimétrico Metil Tiazol Tetrazolium (MTT) y PCR cuantitativo, respectivamente. RESULTADOS: El tratamiento fotodinámico presentó un efecto inhibitorio sobre promastigotes, principalmente sobre Leishmania (V.) peruviana, en menor proporción sobre Leishmania (V.) braziliensis y sobre las formas intracelulares de ambas especies. En Leishmania (V.) peruviana, a las 24 horas posirradiación a 200 µM y 350 µM el efecto inhibitorio fue del 72,9% y 73,9%, respectivamente y a las 96 horas fue del 78,8% y 80,6%, respectivamente. En las formas intracelulares, empleando 200 µM y evaluado a las 72 horas postratamiento, se observó una inhibición del 57,8% de amastigotes de Leishmania (V.) peruviana. El IC50 fue del 56,5; 50; 44; y 39,7 µM, que corresponde a las 24, 48, 72 y 96 horas posirradiación, respectivamente. CONCLUSIONES: El tratamiento fotodinámico empleando AlPcClS4 frente a las especies de Leishmania presentó resultados alentadores principalmente sobre Leishmania (V.) peruviana, lo cual sugiere su potencial uso como alternativa o complemento del tratamiento convencional de la leishmaniasis tegumentaria. Sin embargo, aún se requiere continuar con nuevos ensayos para determinar el índice de selectividad sobre el parásito en su forma intracelular, y desarrollar estrategias que faciliten el ingreso eficiente de la molécula hacia la célula hospedera y al parásito.


Subject(s)
Chlorides , Indoles , Leishmania , Organometallic Compounds , Chlorides/pharmacology , Indoles/pharmacology , Leishmania/classification , Leishmania/drug effects , Leishmania braziliensis/drug effects , Organometallic Compounds/pharmacology
4.
Rev. peru. med. exp. salud publica ; 37(3): 462-470, jul-sep 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1145017

ABSTRACT

RESUMEN Objetivos: Evaluar la actividad fotodinámica in vitro de la ftalocianina de aluminio tetrasulfonada clorada (AlPcClS4) sobre promastigotes y amastigotes de Leishmania (Viannia) peruviana y Leishmania (Viannia) braziliensis. Materiales y métodos: La actividad del tratamiento fotodinámico empleando AlPcClS4 sobre promastigotes y amastigotes de Leishmania fue determinada mediante el método colorimétrico Metil Tiazol Tetrazolium (MTT) y PCR cuantitativo, respectivamente. Resultados: El tratamiento fotodinámico presentó un efecto inhibitorio sobre promastigotes, principalmente sobre Leishmania (V.) peruviana, en menor proporción sobre Leishmania (V.) braziliensis y sobre las formas intracelulares de ambas especies. En Leishmania (V.) peruviana, a las 24 horas posirradiación a 200 µM y 350 µM el efecto inhibitorio fue del 72,9% y 73,9%, respectivamente y a las 96 horas fue del 78,8% y 80,6%, respectivamente. En las formas intracelulares, empleando 200 µM y evaluado a las 72 horas postratamiento, se observó una inhibición del 57,8% de amastigotes de Leishmania (V.) peruviana. El IC50 fue del 56,5; 50; 44; y 39,7 µM, que corresponde a las 24, 48, 72 y 96 horas posirradiación, respectivamente. Conclusiones: El tratamiento fotodinámico empleando AlPcClS4 frente a las especies de Leishmania presentó resultados alentadores principalmente sobre Leishmania (V.) peruviana, lo cual sugiere su potencial uso como alternativa o complemento del tratamiento convencional de la leishmaniasis tegumentaria. Sin embargo, aún se requiere continuar con nuevos ensayos para determinar el índice de selectividad sobre el parásito en su forma intracelular, y desarrollar estrategias que faciliten el ingreso eficiente de la molécula hacia la célula hospedera y al parásito.


ABSTRACT Objectives: To evaluate the in vitro photodynamic activity of aluminum phthalocyanine tetrasulfonate chloride (AlPcClS4) on promastigotes and amastigotes of Leishmania (Viannia) peruviana and Leishmania (Viannia) braziliensis. Materials and methods: The activity of photodynamic therapy using AlPcClS4 on Leishmania promastigote and amastigotes was determined by the Methyl Thiazole Tetrazolium (MTT) colorimetric method and quantitative PCR, respectively. Results: Photodynamic treatment showed an inhibitory effect on promastigotes, particularly on Leishmania (V.) peruviana, to a lesser extent on Leishmania (V.) braziliensis and also on intracellular forms of both species. At 24 hours post-radiation, using concentrations of 200 μM and 350 μM, the inhibitory effect on Leishmania (V.) peruviana was 72.9% and 73.9% respectively; at 96 hours the inhibitory effect was of 78.8% and 80.6%, respectively. Regarding intracellular forms, the inhibitory effect on Leishmania (V.) peruviana amastigotes was 57.8% at 72 hours post-treatment, using a concentration of 200 μM. The IC50 was 56.5, 50, 44 and 39.7 μM, at 24, 48, 72 and 96 hours post-radiation, respectively. Conclusions: Photodynamic therapy using AlPcClS4 against Leishmania species showed encouraging results, mainly on Leishmania (V.) peruviana, suggesting a potential use as an alternative or complement to the usual treatment of tegumentary leishmaniasis. However, new trials are still required to determine the selectivity index for the intracellular form of the parasite, and to develop methods to facilitate the efficient entry of the molecule into the host cell and the parasite.


Subject(s)
Leishmania braziliensis , In Vitro Techniques , Leishmaniasis , Aluminum , Photochemotherapy , Tropical Medicine , Leishmaniasis, Cutaneous , Photosensitizing Agents
5.
Rev Peru Med Exp Salud Publica ; 37(1): 87-92, 2020.
Article in Spanish, English | MEDLINE | ID: mdl-32520199

ABSTRACT

In Peru, leishmaniasis is a metaxenic disease that represents a serious public health problem, due to its wide distribution and the number of people in danger of contracting the disease, being the vulnerable population mainly those with low economic resources. The study was conducted from patients who were derived to Peru's National Institute of Health between 2006 and 2011 so that the specialized diagnosis could be carried out. The identification of the species of infectious Leishmania was developed through the analysis of the High-Resolution Melting Analysis obtained from the genomic DNA of promastigotes and amastigotes, which allows to identify the species of Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana as more prevalent, in addition to Leishmania (V.) lainsoni and Leishmania (L.) amazonensis.


En el Perú, la leishmaniasis es una enfermedad metaxénica que representa un serio problema de salud pública, debido a su amplia distribución y al número de personas en riesgo de contraer la enfermedad, siendo la población vulnerable principalmente las personas de bajos recursos económicos. El estudio se realizó a partir de pacientes que fueron derivados al Instituto Nacional de Salud entre el 2006 y el 2011 para que se les realizara el diagnóstico especializado. La identificación de la especie de Leishmania infectante se desarrolló mediante el análisis de las curvas de disociación (HRMA) obtenidas a partir del ADN genómico de promastigotes y amastigotes, lo que permitió identificar las especies de Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana como las más prevalentes, además de Leishmania (V.) lainsoni y Leishmania (L.) amazonensis.


Subject(s)
Leishmania , Leishmaniasis , Humans , Leishmania/genetics , Leishmania/isolation & purification , Leishmania braziliensis/genetics , Leishmania braziliensis/isolation & purification , Leishmania guyanensis/genetics , Leishmania guyanensis/isolation & purification , Leishmaniasis/epidemiology , Leishmaniasis/parasitology , Leishmaniasis/therapy , Peru/epidemiology
6.
Rev. peru. med. exp. salud publica ; 37(1): 87-92, ene.-mar. 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1101806

ABSTRACT

RESUMEN En el Perú, la leishmaniasis es una enfermedad metaxénica que representa un serio problema de salud pública, debido a su amplia distribución y al número de personas en riesgo de contraer la enfermedad, siendo la población vulnerable principalmente las personas de bajos recursos económicos. El estudio se realizó a partir de pacientes que fueron derivados al Instituto Nacional de Salud entre el 2006 y el 2011 para que se les realizara el diagnóstico especializado. La identificación de la especie de Leishmania infectante se desarrolló mediante el análisis de las curvas de disociación (HRMA) obtenidas a partir del ADN genómico de promastigotes y amastigotes, lo que permitió identificar las especies de Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana como las más prevalentes, además de Leishmania (V.) lainsoni y Leishmania (L.) amazonensis.


ABSTRACT In Peru, leishmaniasis is a metaxenic disease that represents a serious public health problem, due to its wide distribution and the number of people in danger of contracting the disease, being the vulnerable population mainly those with low economic resources. The study was conducted from patients who were derived to Peru's National Institute of Health between 2006 and 2011 so that the specialized diagnosis could be carried out. The identification of the species of infectious Leishmania was developed through the analysis of the High-Resolution Melting Analysis obtained from the genomic DNA of promastigotes and amastigotes, which allows to identify the species of Leishmania (Viannia) braziliensis, Leishmania (V.) guyanensis, Leishmania (V.) peruviana as more prevalent, in addition to Leishmania (V.) lainsoni and Leishmania (L.) amazonensis.


Subject(s)
Humans , Leishmaniasis , Leishmania , Peru/epidemiology , Leishmania braziliensis/isolation & purification , Leishmania braziliensis/genetics , Leishmaniasis/parasitology , Leishmaniasis/therapy , Leishmaniasis/epidemiology , Leishmania guyanensis/isolation & purification , Leishmania guyanensis/genetics , Leishmania/isolation & purification , Leishmania/genetics
7.
Parasite Epidemiol Control ; 4: e00095, 2019 Feb.
Article in English | MEDLINE | ID: mdl-30847411

ABSTRACT

BACKGROUND: The parasite of the genus Leishmania causes a neglected disease known as leishmaniasis, which has different clinical aspects depending on the species that infects the person and the immune response of the patient. The objective was to determine, using molecular biology, the current circulating species of Leishmania in biopsies of different types of cutaneous leishmaniasis (CL) from the endemic district in the region of "Madre de Dios", Peru. METHODS: The study's 19 samples were obtained in the Huepethue district in the "Madre de Dios" region from patients who were diagnosed for suspected leishmaniasis infection with three clinical manifestations. These were analyzed using kDNA-PCR, Nested-PCR and HRM-PCR to identify the genus of an infecting parasite as well as its species. RESULTS: kDNA-PCR detected all tests for the genus of Leishmania to be positive, while the Nested-PCR could not detect 20.9% of species (one L. (V.) braziliensis and three L. (V.) amazonensis), and the HRM-PCR detected all species presented in the samples. The most prevalent species was L. (V.) braziliensis (73.7%), and the clinical manifestations were ulcers (63.2%), superficial scabs (5.3%) and diffuse form (5.3%), followed by L. (V.) amazonensis (15.8%), manifesting ulcers (15.6%), and L. (V.) lainsoni (10.5%), manifesting superficial scabs (5.3%) and ulcers (5.3%). L. (V.) braziliensis, L. (V.) amazonensis and L. (V.) lainsoni were detected effectively using HRM-PCR in the samples with different clinical manifestations. CONCLUSIONS: Highlighting the findings of a high diversity of Leishmania species using High Resolution Melting PCR in biopsies with different clinical manifestations of cutaneous leishmaniasis.

8.
Biomédica (Bogotá) ; 37(supl.2): 208-214, jul.-set. 2017. tab, graf
Article in Spanish | LILACS | ID: biblio-888537

ABSTRACT

Resumen Introducción. En estudios previos se detectó la presencia de Leishmania infantum en Rhipicephalus sanguineus, lo cual planteaba la posibilidad de que R. sanguineus transmitiera la leishmaniasis a una variedad de huéspedes. Objetivo. Identificar Leishmania (Viannia) spp. en garrapatas recolectadas en animales silvestres de una zona endémica para leishmaniasis. Materiales y métodos. Se hicieron 81 extracciones individuales de ADN en las garrapatas recogidas de tres tapires o dantas (Tapirus terrestres) y tres pecaríes de collar (Pecari tajacu) cazados en Madre de Dios, Perú. Las garrapatas recolectadas se identificaron taxonómicamente y se prepararon para la identificación del cinetoblasto (kDNA) de Leishmania (Viannia) spp. mediante reacción en cadena de la polimerasa (PCR), así como de la especie de Leishmania mediante PCR de fusión de alta resolución (High Resolution Melt, HRM). Resultados. Se detectó el kDNA de Leishmania (V) spp. en tres garrapatas silvestres de R. (Boophilus) microplus, Canestrini, 1888, recolectadas en un pecarí de collar cazado en la selva de Madre de Dios. El análisis mediante HRM-PCR evidenció que una de las muestras positivas de kDNA tenía una curva compatible con L. (V) guyanensis. Conclusión. Los resultados evidenciaron la presencia de ADN de L. (V) guyanensis en R. (Boophilus) microplus, probablemente adquirida después de picar al pecarí. Es importante hacer nuevos estudios para aclarar la participación de R. (Boophilus) microplus en la transmisión de la leishmaniasis.


Abstract Introduction: Previous studies identified the presence of Leishmania infantum in Rhipicephalus sanguineus and indicated the possibility that it could transmit leishmaniasis to a variety of hosts. Objective: To identify parasites of Leishmania (Viannia) spp. in ticks collected from wild animals in an endemic area for leishmaniasis. Materials and methods: We performed 81 individual DNA extractions from ticks collected from three Tapirus terrestris and three Pecari tajacu in Madre de Dios, Perú. Ticks were taxonomically identified and they were subsequently prepared to identify Leishmania (Viannia) spp. kDNA by PCR and the species of Leishmania by HRM-PCR. Results: Leishmania (Viannia) kDNA was detected in three wild ticks of the species R. microplus, collected from a collard peccary (P. tajacu) hunted in the forests of Madre de Dios. The HRM-PCR showed that one of the positive samples had a kDNA curve compatible with L. (V) guyanensis. Conclusion: The results showed the presence of L. (V) guyanensis DNA in R. microplus possibly acquired after biting a collarde peccary. Therefore, it is important to design future studies to clarify R. microplus involvement in the transmission of leishmaniasis.


Subject(s)
Animals , Male , Arachnid Vectors/parasitology , Artiodactyla/parasitology , Tick Infestations/veterinary , Leishmania guyanensis/isolation & purification , Rhipicephalus/parasitology , Perissodactyla/parasitology , Peru/epidemiology , Species Specificity , Tick Infestations/parasitology , Disease Reservoirs , Leishmaniasis, Mucocutaneous/transmission , Leishmaniasis, Mucocutaneous/epidemiology , Polymerase Chain Reaction , Leishmania guyanensis/genetics , DNA, Kinetoplast/analysis , Endemic Diseases
9.
Rev Peru Med Exp Salud Publica ; 32(1): 33-40, 2015.
Article in Spanish | MEDLINE | ID: mdl-26102103

ABSTRACT

OBJECTIVES: To determine the infectivity of promastigotes of Leishmania (V.) peruviana and Leishmania (V.) braziliensis in monocyte-macrophage cell line DH82 of Canis familiaris. MATERIALS AND METHODS: Was conducted a experimental study during the months of january to december 2013. Were used strains of Leishmania were used (V.) braziliensis MHOM/PE/84/LC53 and Leishmania (V.) peruviana MHOM/PE/84/LC26. The cell line was infected with stationary phase promastigotes and infectivity was determined as the product of percent infected macrophages average amastigotes per macrophage observed in epifluorescence microscope. RESULTS: 13% of metacyclic forms to Leishmania (V.) braziliensis corresponded to 17.5 days post inoculation and Leishmania (V.) peruviana a percentage of 9.5% on the day 14.5. No significant difference was found between infectivity of stationary phase promastigotes of both species. CONCLUSIONS: It is recommended assess the infectivity of metacyclic promastigotes peruviana strains of Leishmania (V.) and Leishmania (V.) braziliensis cell lines in order to determine the most appropriate model in vitro infection, allowing leishmanicidas make the drug more effective susceptibility studies for disease control.


Subject(s)
Leishmania braziliensis/pathogenicity , Animals , Cell Line , Dogs , Leishmania braziliensis/growth & development
10.
Rev. peru. med. exp. salud publica ; 32(1): 33-40, ene.-mar. 2015. tab
Article in Spanish | LILACS, LIPECS, INS-PERU | ID: lil-745217

ABSTRACT

Objetivos. Determinar la capacidad infectiva de los promastigotes de Leishmania (V.) peruviana y Leishmania (V.) braziliensis en la línea celular macrófago-monocítica de Canis familiaris DH82. Materiales y métodos. Se realizó un estudio experimental durante los meses de enero a diciembre de 2013. Se utilizaron cepas referenciales de Leishmania (V.) braziliensis MHOM/PE/84/LC53 y Leishmania (V.) peruviana MHOM/PE/84/LC26. La línea celular fue infectada con promastigotes en fase estacionaria y la capacidad infectiva fue determinada como el producto del porcentaje de macrófagos infectados por el promedio de amastigotes por macrófago infectado, observado al microscopio de epifluorescencia. Resultados. El 13% de formas metacíclicas para Leishmania (V.) braziliensis correspondió al día 17,5 posinoculación y para Leishmania (V.) peruviana un porcentaje de 9,5% en el día 14,5. No se encontró diferencia significativa entre la capacidad infectiva de los promastigotes en fase estacionaria de ambas especies. Conclusiones. Se recomienda evaluar la capacidad infectiva de los promastigotes metacíclicos de cepas de Leishmania (V.) peruviana y Leishmania (V.) braziliensis en líneas celulares, a fin de determinar el modelo de infección in vitro más adecuado, que permita efectuar estudios de susceptibilidad a las drogas leishmanicidas de mayor eficacia para el control de la enfermedad.


Objectives. To determine the infectivity of promastigotes of Leishmania (V.) peruviana and Leishmania (V.) braziliensis in monocyte-macrophage cell line DH82 of Canis familiaris. Materials and methods. Was conducted a experimental study during the months of january to december 2013. Were used strains of Leishmania were used (V.) braziliensis MHOM / PE / 84 / LC53 and Leishmania (V.) peruviana MHOM / PE / 84 / LC26. The cell line was infected with stationary phase promastigotes and infectivity was determined as the product of percent infected macrophages average amastigotes per macrophage observed in epifluorescence microscope. Results. 13% of metacyclic forms to Leishmania (V.) braziliensis corresponded to 17.5 days post inoculation and Leishmania (V.) peruviana a percentage of 9.5% on the day 14.5. No significant difference was found between infectivity of stationary phase promastigotes of both species. Conclusions. It is recommended assess the infectivity of metacyclic promastigotes peruviana strains of Leishmania (V.) and Leishmania (V.) braziliensis cell lines in order to determine the most appropriate model in vitro infection, allowing leishmanicidas make the drug more effective susceptibility studies for disease control.


Subject(s)
Leishmania braziliensis , Leishmaniasis , Cell Line , Virulence , Peru
11.
Rev Peru Med Exp Salud Publica ; 31(3): 595-7, 2014.
Article in Spanish | MEDLINE | ID: mdl-25418662

ABSTRACT

Clinical manifestations of leishmaniasis are diverse and related to the infecting species, its relationship with the environment and the host immune response. A case of late Andean cutaneous leishmaniasis with extensive manifestation is presented. The case was confirmed through microbiological and immunological studies; identification was performed by cytochrome b gene sequencing and the species was determined as Leishmania (Leishmania) amazonensis. The patient was treated with sodium stibogluconate and at the end of therapy the patient showed clinical improvement of the lesions. It is recommended to consider leishmaniasis in differential diagnosis when treating atypical dermatological chronic ulcers.


Subject(s)
Leishmaniasis, Cutaneous/pathology , Female , Humans , Young Adult
12.
Rev. peru. med. exp. salud publica ; 31(3): 595-597, jul.-sep. 2014. ilus
Article in Spanish | LILACS, LIPECS, INS-PERU | ID: lil-743200

ABSTRACT

Las manifestaciones clínicas de la leishmaniosis son variables y están relacionadas con la especie infectante, su relación con el medioambiente y con la respuesta inmune del hospedero. Se presenta un caso de leishmaniosis andina cutánea tardía con una manifestación extensa. El caso se confirmó a través de estudios microbiológicos e inmunológicos, la identificación se realizó mediante secuenciamiento del gen del citocromo b, determinándose la especie como Leishmania (Leishmania) amazonensis. La paciente recibió tratamiento con estibogluconato sódico y al término de la terapia, mostró mejoría clínica de las lesiones. Se recomienda considerar a la leishmaniosis en el diagnóstico diferencial cuando se atienda ulceras crónicas dermatológicas atípicas...


Clinical manifestations of leishmaniasis are diverse and related to the infecting species, its relationship with the environment and the host immune response. A case of late Andean cutaneous leishmaniasis with extensive manifestation is presented. The case was confirmed through microbiological and immunological studies; identification was performed by cytochrome b gene sequencing and the species was determined as Leishmania (Leishmania) amazonensis. The patient was treated with sodium stibogluconate and at the end of therapy the patient showed clinical improvement of the lesions. It is recommended to consider leishmaniasis in differential diagnosis when treating atypical dermatological chronic ulcers...


Subject(s)
Humans , Adult , Female , Cytochromes b , Leishmania , Leishmaniasis, Cutaneous , Peru
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