Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 100
Filter
1.
Rev. bras. entomol ; 64(4): e20200074, 2020. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1137757

ABSTRACT

Abstract The occurrence of cutaneous leishmaniasis (CL) in the municipalities of Jaboti, Japira, Pinhalão, and Tomazina in the North Pioneer of the State of Paraná, where this disease is endemic, prompted the investigation of sandfly fauna, their population changes throughout the year, and their behavior in and around human accommodation. In these municipalities, the collection of sandflies was conducted using Falcão traps from 7 pm to 6 am once a month. 32,994 sandflies, 18,442 males and 14,552 females, were collected and represented by the species Brumptomyia brumpti, Brumptomyia cunhai, Evandromyia correalimai, Evandromyia cortelezzii, Expapillata firmatoi, Micropygomyia ferreirana, Migonemyia migonei, Nyssomyia neivai, Nyssomyia whitmani, Pintomyia fischeri, Pintomyia monticola, Pintomyia pessoai, and Psathyromyia bigeniculata. Ny. neivai (SISA = 0.9808) predominated in Japira (46.9%), Pinhalão (53.1%), and Tomazina (38.9%), while Ny. whitmani (SISA = 0.9423) predominated in Jaboti (53.8%). Most sandflies were captured in domestic animal shelters, with a peak in September. The high number of sandflies collected in domestic animal shelters, species richness, and presence of species involved in the epidemiology of CL reveal the need for permanent entomological surveillance in the municipalities mentioned. The use of phlebotomine control measures in these municipalities should be considered in conjunction with the anthropogenic actions that have resulted in changes to sandfly fauna and behavior.

2.
Vector Borne Zoonotic Dis ; 18(10): 570-574, 2018 10.
Article in English | MEDLINE | ID: mdl-29989484

ABSTRACT

Leishmaniases are classified as tegumentary leishmaniasis (TL) and visceral leishmaniasis (VL). Brazil is among the countries with the highest number of TL and VL cases. This study was undertaken to standardize the multiplex polymerase chain reaction (PCR) for the detection of the genus Leishmania in sandflies of endemic regions, on islands in the Upper Paraná River, northwestern Paraná. The sandflies were collected on 10 islands, from November 2012 to November 2014, with Falcão light traps, identified and conserved in tubes containing isopropanol, for subsequent DNA extraction. Two pairs of primers were used for multiplex PCR: A1/A2 and 5Llcac/3Llcac. Nyssomyia neivai was the predominant species of the collected specimens. A total of 3870 samples of female sandflies were analyzed and submitted to multiplex PCR, for the validation of the technique. All pools showed the 220 bp fragment for sandfly DNA detection, but no ∼120 bp fragment of Leishmania DNA was found. Although no natural infection of Ny. neivai by Leishmania was found in this study, the interaction of sandflies with Leishmania and its natural reservoirs continues in these Paraná River islands, despite the low diversity of the sandfly fauna. Some of these islands have permanent residents and are frequented by tourists.


Subject(s)
Leishmania/isolation & purification , Multiplex Polymerase Chain Reaction/methods , Psychodidae/parasitology , Animals , Brazil/epidemiology
3.
Mem Inst Oswaldo Cruz ; 113(6): e170505, 2018 05 14.
Article in English | MEDLINE | ID: mdl-29768531

ABSTRACT

BACKGROUND: Cutaneous leishmaniasis (CL) is endemic in the state of Paraná, Brazil. OBJECTIVE: This study aimed at analysing the influence of the remaining native vegetation on the prevalence of CL in Paraná. METHODS: Global testing was used for spatial autocorrelation along with simultaneous autoregressive model (SAR). The regression was based on the CL coefficient (cases/100,000 inhabitants) as a function of the percentage of natural vegetation cover, altitude, total number of cases, and spatial density (SD) per km2; the location data of the Paraná state municipalities and the detection coefficient (DC) (cases/100,000 inhabitants) of autochthonous cases of CL were obtained from the SINAN in 2012 and 2016. Data on the remaining forests were collected from the Fundação SOS Mata Atlântica and Instituto Nacional de Pesquisas Espaciais. FINDINGS: The spatial regression of DC revealed statistical significance for SD (Z = 24.1359, p < 0.05, 2012-2013; Z = 24.0817, p < 0.05, 2013-2014; Z = 33.4824, p < 0.05, 2014-2015; and Z = 27.1515, p < 0.05, 2015-2016. CONCLUSIONS: CL cases are reported in areas with native vegetation, such as in riparian forests. However, vegetation is not the only variable that influences the incidence of CL.


Subject(s)
Forests , Leishmaniasis, Cutaneous/epidemiology , Adolescent , Adult , Aged , Aged, 80 and over , Brazil/epidemiology , Child , Child, Preschool , Female , Geographic Mapping , Humans , Infant , Male , Middle Aged , Prevalence , Spatial Analysis , Young Adult
4.
Mem. Inst. Oswaldo Cruz ; 113(6): e170505, 2018. tab, graf
Article in English | LILACS | ID: biblio-1526303

ABSTRACT

BACKGROUND Cutaneous leishmaniasis (CL) is endemic in the state of Paraná, Brazil. OBJECTIVE This study aimed at analysing the influence of the remaining native vegetation on the prevalence of CL in Paraná. METHODS Global testing was used for spatial autocorrelation along with simultaneous autoregressive model (SAR). The regression was based on the CL coefficient (cases/100,000 inhabitants) as a function of the percentage of natural vegetation cover, altitude, total number of cases, and spatial density (SD) per km2; the location data of the Paraná state municipalities and the detection coefficient (DC) (cases/100,000 inhabitants) of autochthonous cases of CL were obtained from the SINAN in 2012 and 2016. Data on the remaining forests were collected from the Fundação SOS Mata Atlântica and Instituto Nacional de Pesquisas Espaciais. FINDINGS The spatial regression of DC revealed statistical significance for SD (Z = 24.1359, p < 0.05, 2012-2013; Z = 24.0817, p < 0.05, 2013-2014; Z = 33.4824, p < 0.05, 2014-2015; and Z = 27.1515, p < 0.05, 2015-2016. CONCLUSIONS CL cases are reported in areas with native vegetation, such as in riparian forests. However, vegetation is not the only variable that influences the incidence of CL.


Subject(s)
Prevalence , Leishmaniasis, Cutaneous/epidemiology , Geographic Mapping , Spatial Analysis
5.
PLoS One ; 12(9): e0185401, 2017.
Article in English | MEDLINE | ID: mdl-28938013

ABSTRACT

The geographic distribution of cutaneous leishmaniasis (CL) makes it a disease of major clinical importance in Brazil, where it is endemic in the state of Paraná. The objective of this study was to analyze the spatial distribution of CL in Paraná between 2001 and 2015, based on data from the Sistema de Informação de Agravos de Notificação (Information System for Notifiable Diseases) regarding autochthonous CL cases. Spatial autocorrelation was performed using Moran's Global Index and the Local Indicator of Spatial Association (LISA). The construction of maps was based on categories of association (high-high, low-low, high-low, and low-high). A total of 4,557 autochthonous cases of CL were registered in the state of Paraná, with an annual average of 303.8 (± 135.2) and a detection coefficient of 2.91. No correlation was found between global indices and their respective significance in 2001 (I = -0.456, p = 0.676), but evidence of spatial autocorrelation was found in other years (p< 0.05). In the construction and analysis of the cluster maps, areas with a high-high positive association were found in the Ivaí-Pirapó, Tibagi, Cinzas-Laranjinha, and Ribeira areas. The state of Paraná should keep a constant surveillance over CL due to the prominent presence of socioeconomic and environmental factors such as the favorable circumstances for the vectors present in peri-urban and agriculture áreas.


Subject(s)
Leishmaniasis, Cutaneous/epidemiology , Adolescent , Adult , Aged , Aged, 80 and over , Brazil/epidemiology , Child , Child, Preschool , Cluster Analysis , Female , Geography, Medical , Humans , Incidence , Infant , Male , Middle Aged , Spatial Analysis , Young Adult
6.
Rev Inst Med Trop Sao Paulo ; 59: e64, 2017 Sep 04.
Article in English | MEDLINE | ID: mdl-28876416

ABSTRACT

The aim of this study was to better understand the dynamics of Leishmania sand flies and reservoirs in São Domingos ranch, Arapongas municipality, Paraná State, an anthropic environment in an endemic area of cutaneous leishmaniasis (CL). Sand flies were collected in wild animal burrows, residences and in the forest, with Falcão light trap (FA), Shannon trap (SH) and quadrangular pyramidal trap (QP). The search for Leishmania was made on sand flies, biological samples of wild rodents and dogs using PCR and culture; while parasite direct search (DS) was carried out on animal skin lesions; infection of gold hamsters; and indirect immunofluorescence (IIF) test in dog blood samples. Eighty eight (88) sand flies were collected with FA traps and 526 sand flies using the SH trap, with a predominance of Pintomyia fischeri. Six hundred and one (601) specimens of Brumptomyia brumpti were collected in armadillo burrows, with the QP trap. Seventeen (17) wild rodents were captured, six of them had skin lesions with characteristics of Leishmania infection. Even though no positive test was found for Leishmania, epidemiological surveillance should be maintained, remembering that the human buildings are situated only 50 m from the forest. Considering the species of wild animals and sandflies found in São Domingos, the negative test found do not exclude the existence of the Leishmania transmission cycle in this preservation area.


Subject(s)
Insect Vectors/parasitology , Psychodidae/parasitology , Rodentia/parasitology , Animals , Brazil , Disease Reservoirs/classification , Disease Reservoirs/parasitology , Dogs , Endemic Diseases , Female , Humans , Insect Vectors/classification , Leishmaniasis, Cutaneous/transmission , Male , Psychodidae/classification , Rodentia/classification , Seasons
7.
Rev Inst Med Trop Sao Paulo ; 59: e37, 2017 Jun 01.
Article in English | MEDLINE | ID: mdl-28591265

ABSTRACT

The authors report a case of disseminated cutaneous leishmaniasis caused by Leishmania (Viannia) braziliensis, in a 55 years old patient with 1,119 lesions distributed throughout the body. The patient resides in Sabáudia municipality, North of Paraná State, Southern Brazil, where there was no previous report of this form of leishmaniasis. Treatment with meglumine antimoniate was successful, although the diagnosis was made only five months later.


Subject(s)
Leishmania braziliensis , Leishmaniasis, Cutaneous/diagnosis , Antiprotozoal Agents/therapeutic use , Brazil , Humans , Leishmaniasis, Cutaneous/drug therapy , Male , Meglumine/therapeutic use , Meglumine Antimoniate , Middle Aged , Organometallic Compounds/therapeutic use
8.
Rev Inst Med Trop Sao Paulo ; 59: e10, 2017 Apr 03.
Article in English | MEDLINE | ID: mdl-28380111

ABSTRACT

The genetic study of sandfly populations needs to be further explored given the importance of these insects for public health. Were sequenced the NDH4 mitochondrial gene from populations of Nyssomyia neivai from Doutor Camargo, Lobato, Japira, and Porto Rico, municipalities in the State of Paraná, Brazil, to understand the genetic structure and gene flow. Eighty specimens of Ny. Neivai were sequenced, 20 from each municipality, and 269 base pairs were obtained. A total of 27 haplotypes and 28 polymorphic sites were found, along with a haplotypic diversity of 0.80696 and a nucleotide diversity of 0.00567. Haplotype H5, with 33 specimens, was the most common among the four populations. Only haplotypes H5 and H7 were present in all four populations. The population from Doutor Camargo showed the highest genetic diversity, and only this population shared haplotypes with those from the other municipalities. The highest number of haplotypes was sheared with Lobato which also had the highest number of unique haplotypes. This probably occurred because of constant anthropic changes that happened in the environment during the first half of the twentieth century, mainly after 1998. There was no significant correlation between genetic and geographical distances regarding these populations. However, the highest genetic and geographical distances, and the lowest gene flow were observed between Japira and Porto Rico. Geographical distance is a possible barrier between these municipalities through the blocking of haplotype sharing.


Subject(s)
Genetic Variation/genetics , Insect Vectors/genetics , Psychodidae/genetics , Animals , Brazil , DNA, Mitochondrial/analysis , DNA, Protozoan/analysis , Female , Insect Vectors/classification , Leishmaniasis, Cutaneous/transmission , Polymerase Chain Reaction , Psychodidae/classification
9.
Rev. Inst. Med. Trop. Säo Paulo ; 59: e10, 2017. tab, graf
Article in English | LILACS | ID: biblio-842769

ABSTRACT

ABSTRACT The genetic study of sandfly populations needs to be further explored given the importance of these insects for public health. Were sequenced the NDH4 mitochondrial gene from populations of Nyssomyia neivai from Doutor Camargo, Lobato, Japira, and Porto Rico, municipalities in the State of Paraná, Brazil, to understand the genetic structure and gene flow. Eighty specimens of Ny. Neivai were sequenced, 20 from each municipality, and 269 base pairs were obtained. A total of 27 haplotypes and 28 polymorphic sites were found, along with a haplotypic diversity of 0.80696 and a nucleotide diversity of 0.00567. Haplotype H5, with 33 specimens, was the most common among the four populations. Only haplotypes H5 and H7 were present in all four populations. The population from Doutor Camargo showed the highest genetic diversity, and only this population shared haplotypes with those from the other municipalities. The highest number of haplotypes was sheared with Lobato which also had the highest number of unique haplotypes. This probably occurred because of constant anthropic changes that happened in the environment during the first half of the twentieth century, mainly after 1998. There was no significant correlation between genetic and geographical distances regarding these populations. However, the highest genetic and geographical distances, and the lowest gene flow were observed between Japira and Porto Rico. Geographical distance is a possible barrier between these municipalities through the blocking of haplotype sharing.


Subject(s)
Animals , Female , Genetic Variation/genetics , Insect Vectors/genetics , Psychodidae/genetics , Brazil , DNA, Mitochondrial/analysis , DNA, Protozoan/analysis , Insect Vectors/classification , Leishmaniasis, Cutaneous/transmission , Polymerase Chain Reaction , Psychodidae/classification
10.
Article in English | LILACS | ID: biblio-842780

ABSTRACT

ABSTRACT The authors report a case of disseminated cutaneous leishmaniasis caused by Leishmania (Viannia) braziliensis, in a 55 years old patient with 1,119 lesions distributed throughout the body. The patient resides in Sabáudia municipality, North of Paraná State, Southern Brazil, where there was no previous report of this form of leishmaniasis. Treatment with meglumine antimoniate was successful, although the diagnosis was made only five months later.


Subject(s)
Humans , Male , Middle Aged , Leishmania braziliensis , Leishmaniasis, Cutaneous/diagnosis , Antiprotozoal Agents/therapeutic use , Brazil , Leishmaniasis, Cutaneous/drug therapy , Meglumine/therapeutic use , Organometallic Compounds/therapeutic use
11.
Rev Bras Parasitol Vet ; 25(4): 394-400, 2016.
Article in English | MEDLINE | ID: mdl-27925056

ABSTRACT

Brazilian spotted fever (BSF) is a fatal zoonosis because of the difficulties in its early diagnosis and treatment. Occurrences of BSF in the northeast of the state of Paraná prompted investigation of areas at risk of this rickettsiosis in the municipalities of Japira, Jaboti, Pinhalão and Tomazina. To determine the areas at risk, 592 serum samples from dogs and 230 from equids were analyzed by means of the indirect immunofluorescence assay (IFA) for Rickettsia rickettsii and R. parkeri . In addition, risk probability maps were drawn up using the kriging indicator technique. Among the samples tested, 5.3% (43/822) indicated presence of antibodies reactive to at least one of the two Rickettsia species tested: 7.8% of the equids (18/230) and 4.2% of the dogs (25/592) were positive. Geostatistical analysis showed that the average seropositivity rate was 5 to 6%. Although the average seropositivity rates observed among these dogs and equids were lower than those reported from endemic areas of Brazil, the biotic components (etiological agent, vector and reservoirs) and environmental aspects of BSF epidemiology were present in these municipalities.


Subject(s)
Antibodies, Bacterial/blood , Dog Diseases/epidemiology , Equidae/blood , Rickettsia Infections/veterinary , Rickettsia/immunology , Rocky Mountain Spotted Fever/veterinary , Animals , Brazil/epidemiology , Dog Diseases/diagnosis , Dogs , Equidae/immunology , Probability , Rickettsia Infections/diagnosis , Rickettsia Infections/epidemiology , Rickettsia rickettsii/immunology , Rocky Mountain Spotted Fever/diagnosis , Rocky Mountain Spotted Fever/epidemiology
12.
Rev. bras. parasitol. vet ; 25(4): 394-400, Sept.-Dec. 2016. tab, graf
Article in English | LILACS | ID: biblio-830032

ABSTRACT

Abstract Brazilian spotted fever (BSF) is a fatal zoonosis because of the difficulties in its early diagnosis and treatment. Occurrences of BSF in the northeast of the state of Paraná prompted investigation of areas at risk of this rickettsiosis in the municipalities of Japira, Jaboti, Pinhalão and Tomazina. To determine the areas at risk, 592 serum samples from dogs and 230 from equids were analyzed by means of the indirect immunofluorescence assay (IFA) for Rickettsia rickettsii and R. parkeri . In addition, risk probability maps were drawn up using the kriging indicator technique. Among the samples tested, 5.3% (43/822) indicated presence of antibodies reactive to at least one of the two Rickettsia species tested: 7.8% of the equids (18/230) and 4.2% of the dogs (25/592) were positive. Geostatistical analysis showed that the average seropositivity rate was 5 to 6%. Although the average seropositivity rates observed among these dogs and equids were lower than those reported from endemic areas of Brazil, the biotic components (etiological agent, vector and reservoirs) and environmental aspects of BSF epidemiology were present in these municipalities.


Resumo A febre maculosa brasileira (FMB) é uma zoonose fatal devido às dificuldades para diagnosticá-la e tratá-la precocemente. A ocorrência de casos de FMB no Estado do Paraná suscitou a investigação de áreas de risco desta rickettsiose nos municípios de Japira, Jaboti, Pinhalão e Tomazina, na mesorregião norte pioneiro do Paraná. Para determinar as áreas de risco foram analisadas amostras de soro de 592 cães e 230 equídeos submetidos à reação de imunofluorescência indireta para Rickettsia rickettsii e R. parkeri. Além disto, foram construídos mapas de probabilidade de risco pela técnica de krigagem indicatriz. Das amostras testadas 5,3% (43/822) continham anticorpos para pelo menos uma das duas rickettsias testadas. Os equídeos apresentaram uma positividade de 7,8% (18/230) e os cães de 4,2% (25/592). A análise geoestatística mostrou que a soropositividade média é de 5 a 6%. Embora as soropositividade médias de cães e equídeos constatadas tenham sido menores do que as relatadas em áreas endêmicas do território brasileiro, os componentes bióticos (agente etiológico, vetor e reservatórios) e ambientais da epidemiologia da FMB se fazem presentes nos municípios referidos.


Subject(s)
Animals , Dogs , Rickettsia/immunology , Rickettsia Infections/veterinary , Rocky Mountain Spotted Fever/veterinary , Equidae/blood , Antibodies, Bacterial/blood , Rickettsia rickettsii/immunology , Rickettsia Infections/diagnosis , Rickettsia Infections/epidemiology , Brazil/epidemiology , Rocky Mountain Spotted Fever/diagnosis , Rocky Mountain Spotted Fever/epidemiology , Probability , Equidae/immunology , Dog Diseases/diagnosis , Dog Diseases/epidemiology
14.
J Vector Ecol ; 40(2): 269-76, 2015 Dec.
Article in English | MEDLINE | ID: mdl-26611961

ABSTRACT

We report the results of an investigation of natural larval sand fly habitats in the Recanto Marista, Doutor Camargo municipality, Paraná state, Brazil, from May, 2010 to August, 2012. We used Alencar emergence traps (AT), experimental traps (ET), and soil samples incubated in a biochemical oxygen demand incubator. Eight sand flies were collected with ATs. One specimen was collected with an ET and 21 were collected in soil samples. The collected species were Brumptomyia brumpti, Micropygomyia ferreirana, Migonemyia bursiformis, Migonemyia migonei, Nyssomyia neivai, Nyssomyia whitmani, and Pintomyia pessoai. The laval habitats of sand flies were located in the Recanto Marista, especially between tree roots, but the number of adults that emerged in the traps and soil samples was small despite the high density of sand flies that has been recorded in the Recanto Marista.


Subject(s)
Psychodidae/physiology , Animals , Brazil , Environmental Monitoring/methods , Larva , Soil
15.
Rev Inst Med Trop Sao Paulo ; 56(5): 391-5, 2014.
Article in English | MEDLINE | ID: mdl-25229218

ABSTRACT

Sandflies transmit pathogens of leishmaniasis. The natural infection of sandflies by Leishmania (Viannia) was assessed in municipalities, in the state of Paraná, in Southern Brazil. Sandflies were collected with Falcão and Shannon traps. After dissection in search of flagellates in digestive tubes and identification of the species, female sandflies were submitted to the Multiplex Polymerase Chain Reaction (multiplex PCR) for detection of the fragment of the kDNA of Leishmania (Viannia) and the fragment from the IVS6 cacophony gene region of the phlebotomine insects. The analysis was performed in pools containing seven to 12 guts from females of the same species. A total of 510 female sandflies were analyzed, including nine Migonemyia migonei, 17 Pintomyia fischeri, 216 Nyssomyia neivai, and 268 Nyssomyia whitmani. Although none of the females was found naturally infected by flagellates through dissection, the fragment of DNA from Leishmania (Viannia) was shown by multiplex PCR in one sample of Ny. neivai (0.46%) and three samples of Ny. whitmani (1.12%). It was concluded that Ny. neivai and Ny. whitmani are susceptible to Leishmania infection, and that multiplex PCR can be used in epidemiological studies to detect the natural infection of the sandfly vector, because of its sensitivity, specificity and feasibility.


Subject(s)
DNA, Protozoan/analysis , Insect Vectors/parasitology , Leishmania/genetics , Psychodidae/parasitology , Animals , Brazil , Female , Insect Vectors/classification , Leishmania/isolation & purification , Multiplex Polymerase Chain Reaction , Psychodidae/classification
16.
Rev. Inst. Med. Trop. Säo Paulo ; 56(5): 391-395, Sep-Oct/2014. tab, graf
Article in English | LILACS | ID: lil-722328

ABSTRACT

Sandflies transmit pathogens of leishmaniasis. The natural infection of sandflies by Leishmania (Viannia) was assessed in municipalities, in the state of Paraná, in Southern Brazil. Sandflies were collected with Falcão and Shannon traps. After dissection in search of flagellates in digestive tubes and identification of the species, female sandflies were submitted to the Multiplex Polymerase Chain Reaction (multiplex PCR) for detection of the fragment of the kDNA of Leishmania (Viannia) and the fragment from the IVS6 cacophony gene region of the phlebotomine insects. The analysis was performed in pools containing seven to 12 guts from females of the same species. A total of 510 female sandflies were analyzed, including nine Migonemyia migonei, 17 Pintomyia fischeri, 216 Nyssomyia neivai, and 268 Nyssomyia whitmani. Although none of the females was found naturally infected by flagellates through dissection, the fragment of DNA from Leishmania (Viannia) was shown by multiplex PCR in one sample of Ny. neivai (0.46%) and three samples of Ny. whitmani (1.12%). It was concluded that Ny. neivai and Ny. whitmani are susceptible to Leishmania infection, and that multiplex PCR can be used in epidemiological studies to detect the natural infection of the sandfly vector, because of its sensitivity, specificity and feasibility.


Flebotomíneos transmitem os patógenos das leishmanioses. Foi avaliada a infecção natural de flebotomíneos por Leishmania (Viannia) em municípios do Estado do Paraná, sul do Brasil. Os flebotomíneos foram coletados com armadilhas de Falcão e Shannon. Após dissecação para pesquisa de flagelados no tubo digestório e identificação das espécies, as fêmeas de flebotomíneos foram submetidas a Multiplex Reação em Cadeia da Polimerase (multiplex PCR) para a detecção do fragmento do kDNA de Leishmania (Viannia) e do fragmento do gene IVS6 da cacofonia de flebotomíneos. A análise foi realizada em pools contendo sete a 12 tubos digestórios de fêmeas da mesma espécie. Um total de 510 fêmeas foram analisadas, incluindo nove Migonemyia migonei, 17 Pintomyia fischeri, 216 Nyssomyia neivai e 268 Nyssomyia whitmani. Embora nenhuma fêmea tenha sido encontrada naturalmente infectada com flagelados pela dissecação, o fragmento de DNA de Leishmania (Viannia) foi mostrado por multiplex PCR em uma amostra de Ny. neivai (0,46%) e três amostras de Ny. whitmani (1,12%). Conclui-se que Ny. neivai e Ny. whitmani são suscetíveis à infecção por Leishmania, e que multiplex PCR, devido à sua sensibilidade, especificidade e viabilidade, pode ser utilizada em estudos epidemiológicos para a detecção da infecção natural do inseto vetor.


Subject(s)
Animals , Female , DNA, Protozoan/analysis , Insect Vectors/parasitology , Leishmania/genetics , Psychodidae/parasitology , Brazil , Insect Vectors/classification , Leishmania/isolation & purification , Multiplex Polymerase Chain Reaction , Psychodidae/classification
17.
PLoS One ; 9(4): e93731, 2014.
Article in English | MEDLINE | ID: mdl-24721908

ABSTRACT

In this study, we detected Leishmania (Viannia) braziliensis infection in equids living in endemic regions of cutaneous leishmaniasis. To determine the role of these animals in the Leishmania cycle, we used two approaches: serological and molecular methods. Antibodies to the parasite were assayed using the Enzyme Linked Immunosorbent Assay (ELISA). Blood samples were collected and tested by polymerase chain reaction (PCR), and the positive products were sequenced. The results showed that 11.0% (25/227) of the equids were seropositive for Leishmania sp, and 16.3% (37/227) were PCR positive. Antibodies were detected in 20 horses, 3 donkeys, and 2 mules, and the parasite DNA was detected in 30 horses, 5 donkeys, and 2 mules. Sequencing the amplified DNA revealed 100% similarity with sequences for Viannia complex, corroborating the results of PCR for L. braziliensis. Our results show that equids are infected with L. braziliensis, which could be food sources for phlebotomines in the peridomiciliary environment and consequently play a role in the cutaneous leishmaniasis cycle.


Subject(s)
Antibodies, Protozoan/blood , Disease Reservoirs/veterinary , Leishmania braziliensis/genetics , Leishmaniasis, Cutaneous/veterinary , Animals , DNA, Protozoan , Disease Reservoirs/parasitology , Enzyme-Linked Immunosorbent Assay , Equidae , Geography , Horses , Polymerase Chain Reaction , Reproducibility of Results , Sequence Analysis, DNA
18.
Rev. Inst. Med. Trop. Säo Paulo ; 55(6): 407-410, Nov-Dec/2013. tab, graf
Article in English | LILACS | ID: lil-690352

ABSTRACT

SUMMARY This study reports the fauna and frequency of sandflies in domestic animal shelters, residences and other ecotopes in rural areas of the municipality of Bandeirantes, Paraná State. Sandflies were collected twice in eight rural villages by using Falcon traps from 8pm to 6am in 2008. In these localities 4,790 sandflies were collected, which were represented by ten sandfly species, prevailing of Nyssomyia neivai and Nyssomyia whitmani species. It was observed that animal shelters are the domestic ecotopes where there is the greatest frequency of these insects. The localities where the collections were made had the environmental characteristics that allow the persistence of transmission of parasites from the American tegumentary leishmaniasis. Although the fauna and the behavior of sandflies species are similar in different localities, the method of controlling these insects should be adjusted to the environmental characteristics of each one of the most diverse endemic areas of American tegumentary leishmaniasis in the municipalities of Paraná State. .


RESUMO Relatam-se, neste trabalho, a fauna e frequência de flebotomíneos em abrigos de animais domésticos, residências e outros ecótopos em áreas rurais do município de Bandeirantes, Estado do Paraná. Os flebotomíneos foram coletados em oito bairros rurais, com armadilhas de Falcão, duas vezes em cada bairro, das 20 às 6 horas, em 2008. No conjunto dos bairros coletaram-se 4.790 flebotomíneos, representados por dez espécies, com predomínio de Nyssomyia neivai e Nyssomyia whitmani. Os abrigos dos animais domésticos são os ecótopos onde há maior frequência desses insetos. As localidades onde as coletas foram realizadas têm características ambientais que permitem a persistência da transmissão de parasitos da leishmaniose tegumentar americana. Apesar da fauna e do comportamento das espécies de flebotomíneos serem semelhantes nas diversas localidades, o método de controle desses insetos deve ser ajustado às características ambientais de cada uma das mais diversas áreas endêmicas de leishmaniose tegumentar americana, nos municípios do Paraná. .


Subject(s)
Animals , Insect Vectors/classification , Psychodidae/classification , Animals, Domestic , Brazil , Housing , Leishmaniasis, Cutaneous/transmission , Rural Population , Seasons
19.
J Med Entomol ; 50(5): 986-93, 2013 Sep.
Article in English | MEDLINE | ID: mdl-24180102

ABSTRACT

The dispersal of and the existence of memory in sand flies were measured in a transmission area of cutaneous leishmaniasis, in the municipality of Bandeirantes, Paraná, Brazil. Sand flies were caught in a rural area, with Shannon trap installed in the forest and three Falcão traps installed in a human-inhabited environment (HIE) and three others in an impacted environment presently uninhabited by humans (EUH), from 1800 to 0600 hours. The captured sand flies were marked with yellow, blue, or red fluorescent powder, according to the environments where they were captured. All marked sand flies were released at 0700 hours at a point between the three environments. The recaptures were made with 28 Falcão traps, distributed in the environments from for 10 consecutive days. The sand flies recaptured were examined under a stereomicroscope and later identified. It was concluded that sand flies are able to disperse over an average distance of 73 m, reaching 130 m in 24 h, showing that: 1) the sand flies were attracted with different intensities to each environment, and the ability to move among different environments allows the existence of enzootic cycle of Leishmania; 2) the sand flies possess a spatial memory, olfactory memory, or both, that enable them to return to the environment where they were captured initially, although the distances were different.


Subject(s)
Insect Control , Insect Vectors/physiology , Psychodidae/physiology , Animal Distribution , Animals , Brazil , Environment , Female , Humans , Leishmania/physiology , Leishmaniasis, Cutaneous/transmission , Male , Memory
20.
Rev Inst Med Trop Sao Paulo ; 55(6): 407-10, 2013.
Article in English | MEDLINE | ID: mdl-24213193

ABSTRACT

This study reports the fauna and frequency of sandflies in domestic animal shelters, residences and other ecotopes in rural areas of the municipality of Bandeirantes, Paraná State. Sandflies were collected twice in eight rural villages by using Falcon traps from 8pm to 6am in 2008. In these localities 4,790 sandflies were collected, which were represented by ten sandfly species, prevailing of Nyssomyia neivai and Nyssomyia whitmani species. It was observed that animal shelters are the domestic ecotopes where there is the greatest frequency of these insects. The localities where the collections were made had the environmental characteristics that allow the persistence of transmission of parasites from the American tegumentary leishmaniasis. Although the fauna and the behavior of sandflies species are similar in different localities, the method of controlling these insects should be adjusted to the environmental characteristics of each one of the most diverse endemic areas of American tegumentary leishmaniasis in the municipalities of Paraná State.


Subject(s)
Insect Vectors/classification , Psychodidae/classification , Animals , Animals, Domestic , Brazil , Housing , Leishmaniasis, Cutaneous/transmission , Rural Population , Seasons
SELECTION OF CITATIONS
SEARCH DETAIL
...