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Acta Tropica

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https://www.readbyqxmd.com/read/29920234/pythium-insidiosum-isolated-from-infected-mosquito-larvae-in-central-brazil
#1
Raquel Vilela, Cristian Montalva, Christian Luz, Richard A Humber, Leonel Mendoza
Pythium insidiosum is a straminopilan pathogen causing life threatening infections in mammals inhabiting temperate, tropical and subtropical areas of the world. The concept that P. insidiosum could also infect mosquitoes was mentioned earlier by investigators conducting phylogenetic analysis on available P. insidiosum isolates deposited at different culture collections. However, an official report and details on its pathological features in mosquitoes are not available. We are reporting the isolation of P. insidiosum from infected mosquito larvae during a survey conducted in central Brazil...
June 16, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29920233/modeling-spatial-risk-of-zoonotic-cutaneous-leishmaniasis-in-central-iran
#2
Babak Shiravand, Abbas Ali Dehghani Tafti, Ahmad Ali Hanafi-Bojd, Ali Almodarresi, Masoud Mirzaei, Mohammad Reza Abai
Zoonotic Cutaneous Leishmaniasis (ZCL) is one of the endemic diseases in central part of Iran. The aim of this cross-sectional study was to find the areas with a higher risk of infection considering the distribution of vector, reservoir hosts and human infection. Passive data recorded the positive cases of cutaneous leishmaniasis in Yazd province health center were collected for 10 years, from 2007 to 2016 at the County level. Considering all earlier studies conducted in Yazd province, records of Phlebotomus papatasi, the main vector of ZCL, and Rhombomys opimus, the main reservoir of ZCL, were collected and entered in a database...
June 16, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29909063/tnf-%C3%AE-antagonist-improves-oxidative-stress-and-lipid-disorders-induced-by-scorpion-venom-in-the-intestinal-tissue
#3
Imane Saidoune-Malek, Aouatef Ait-Lounis, Fatima Laraba-Djebari
We previously reported that Androctonus australis hector (Aah) venom induces inflammation in several tissues, however limited information is available on its role in gastrointestinal tract. Here we evaluate the involvement of TNF-α in lipid metabolism in the small intestine after Aah envenomation. To address these issues, NMRI mice (3-month-old) were pre-treated with a TNF-α antagonist, 30 minutes prior to Aah venom injection. Redox status, cytotoxicity and histopathological changes were analyzed in small intestine 3 and 24 hours after Aah injection...
June 14, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29908171/screening-of-natural-wolbachia-infection-in-aedes-aegypti-aedes-taeniorhynchus-and-culex-quinquefasciatus-from-guadeloupe-french-west-indies
#4
D Goindin, A Cannet, C Delannay, C Ramdini, J Gustave, C Atyame, A Vega-Rúa
Guadeloupe islands are threatened by several mosquito-borne viruses such as Dengue, Chikungunya, Zika and West Nile virus. It appears essential to look for alternative mosquito control methods such as the incompatible insect technique (ITT) aiming at sterilizing wild females by inundative releases of incompatible males. Before considering the implementation of such a strategy, the characterization of genetic diversity of the endocellular bacterium Wolbachia regarding the local mosquito populations is a critical issue...
June 13, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29908170/daily-activity-patterns-of-movement-and-refuge-use-in-triatoma-gerstaeckeri-and-rhodnius-prolixus-hemiptera-reduviidae-vectors-of-the-chagas-disease-parasite
#5
Jillian D Wormington, Cassidy Gillum, Alyssa C Meyers, Gabriel L Hamer, Sarah A Hamer
Transmission risk for vector borne disease is greatest during periods of heightened vector activity. Triatomine bugs (Hemiptera: Reduviidae), which transmit Trypanosoma cruzi, the causative agent of Chagas disease, are generally considered nocturnal, but their patterns of activity in controlled settings have rarely been studied. We quantified activity patterns across a 24-hour period in nymphs of two triatomine species: (1) Triatoma gerstaeckeri Stål, a North American triatomine which is closely associated with sylvatic and peridomestic hosts, and (2) Rhodnius prolixus Stål, a Central and South American triatomine that thrives in the domestic environment...
June 13, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29908169/a-modified-pcr-rflp-method-to-determine-genetic-diversity-of-giardia-lamblia-human-isolates-based-on-triosephosphate-isomerase-tpi-gene
#6
Ferial Rahimian, Javid Sadraei, Majid Pirestani, Fatemeh Ghaffarifar
An infection of digestive system, Giardiasis, caused by tiny parasites called Giardia lamblia (also known Giardia intestinalis or Giardia duodenalis). Giardia sp. is the most common intestinal parasite of humans and other animals throughout the world. Isolates of G. lamblia are classified into eight assemblages based on isoenzyme and DNA analyses. Assemblages A and B infect humans and a broad range of other hosts. The purpose of this study was to genotype human isolates of G. lamblia by PCR-RFLP in Karaj city...
June 13, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29902423/fox-parasites-in-pre-columbian-times-evidence-from-the-past-to-understand-the-current-helminth-assemblages
#7
M H Fugassa, R S Petrigh, P M Fernández, M Carballido Catalayud, C Belleli
This work aims to increase the information on the entero-parasitism in Holocene carnivores, by examining coprolites found in Patagonia. Molecular analysis was conducted following the Authenticity Criteria to Determine Ancient DNA sequences. The nucleotide sequences showed 99% of identity with the Control Region sequences of Lycalopex culpaeus (culpeo fox). Coprolites were positive for gastrointestinal parasites. The presence of Alaria sp. and Clonorchis sp. represents the first record for pre-Columbian America...
June 11, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29890155/insecticide-susceptibility-status-of-phlebotomus-argentipes-and-polymorphisms-in-voltage-gated-sodium-channel-vgsc-gene-in-kala-azar-endemic-areas-of-west-bengal-india
#8
Ashif Ali Sardar, Pabitra Saha, Moytrey Chatterjee, Dilip Kumar Bera, Prasanta Biswas, Dipankar Maji, Subhasish Kamal Guha, Nandita Basu, Ardhendu Kumar Maji
Rational use of insecticides, as advocated by World Health Organisation, plays a crucial role for vector control in eliminating visceral leishmaniasis from endemic countries. Emergence and spread of resistance among vector sand flies is of increasing concern for achieving these goals. Information on insecticide susceptibility status of sand fly populations and potential association between the former and polymorphisms in the insecticide target genes is important for formulating proper vector control measures...
June 8, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29890154/genetic-diversity-of-the-families-aeshnidae-gomphidae-and-libellulidae-through-coi-gene-from-south-china
#9
Saif Ul Islam, Muhammad Qasim, Habib Ali, Waqar Islam, Muhammad Arif, Chandra Kanta Dash, Wenzhong Lin, Zhenguo Du, Zujian Wu
Adult dragonflies (Anisoptera) were collected from different localities of South China covering eight provinces. Representative sequences were sixty-one, including 16 species, 11 genera and three families (Aeshnidae, Gomphidae and Libellulidae), under cytochrome oxidase subunit I (COI) gene. After alignment of sequences by BioEdit v6, genetic interaction and divergence were computed by MEGA 7 whereas all the indices of genetic diversity were calculated by DnaSP v5 software. Phylogenetic trees were constructed through Neighbor-Joining method under Jukes-Cantor model, and all species of respective families were assembled with each other into individual groups...
June 8, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29890153/detection-of-leishmania-dna-in-saliva-among-patients-with-hiv-aids-in-trang-province-southern-thailand
#10
Netranapha Pandey, Suradej Siripattanapipong, Saovanee Leelayoova, Jipada Manomat, Mathirut Mungthin, Peerapan Tan-Ariya, Lertwut Bualert, Tawee Naaglor, Padet Siriyasatien, Atchara Phumee, Phunlerd Piyaraj
Leishmaniasis is a neglected tropical disease causing opportunistic infection among patients with HIV/AIDS. The fatal form of this disease is visceral leishmaniasis (VL). DNA of Leishmania can be detected in saliva, for which the collection is noninvasive and requires little expertise. This study aimed to evaluate the sensitivity and specificity of a nested-PCR to amplify the Internal Transcribed Spacer 1 (ITS1) to detect Leishmania DNA in paired saliva and buffy coat samples of 305 Thai patients with HIV/AIDS in Trang Hospital, Trang Province, southern Thailand...
June 8, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29890152/identification-characterization-immunolocalization-and-biological-activity-of-lucilin-peptide
#11
Tellez German Alberto, Zapata Jesica Alejandra, Toro Lily Johanna, Henao Diana Carolina, Bedoya Juan Pablo, Rivera Juan David, Trujillo Juan Valentin, Rivas Bruno, Richard Onalbi Hoyos Lopez, Castano Jhon Carlos
Maggots from the Lucilia sp. genus are used for debridement of infected and necrotic wounds. Broad-spectrum antimicrobial activity has been described in the excretion/secretions (ES1 ) of these larvae. This study identifies the genetic sequence of a cecropin-like antimicrobial peptide from Lucilia eximia. Total RNA was extracted and used for PCR-RACE amplification of a cecropin, the native peptide was immunolocalized in the tissues and secretions of the larvae, and a synthetic analog was used to explore its antimicrobial, cytotoxic, LPS neutralizing and wound-healing activities in vitro...
June 8, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29887385/corrigendum-to-epidemiology-and-population-structure-of-staphylococcus-aureus-in-various-population-groups-from-a-rural-and-semi-urban-area-in-gabon-central-africa-acta-trop-124-2012-42-47
#12
Ulysse Ateba Ngoa, Frieder Schaumburg, Ayola Akim Adegnika, Katrin Kösters, Tina Möller, Elisabeth Gaus, Jose Francisco Fernandes, Abraham Alabi, Saadou Issifou, Karsten Becker, Martin Peter Grobusch, Peter Gottfried Kremsner, Bertrand Lell
No abstract text is available yet for this article.
June 7, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29883575/survey-on-helminths-and-protozoa-of-free-living-neotropical-bats-from-northeastern-brazil
#13
Victor Fernando Santana Lima, Patrício Adriano Rocha, Mylena Adriele Dias Silva, Raone Beltrão-Mendes, Rafael Antonio Nascimento Ramos, Alessio Giannelli, Laura Rinaldi, Giuseppe Cringoli, Pedro Cordeiro Estrela, Leucio Câmara Alves
Bats are considered important reservoirs of pathogens of veterinary and medical relevance worldwide. However, despite the increasing attention paid towards the central role of bats in the spreading of some zoonotic infections, studies on their own parasites remain patchy especially in Neotropical regions. Understanding the relationships occurring between bats and their pathogens is a crucial step to determine the implications undermining the ecology and biology of these animals. The present study aims to assess the endoparasitic fauna of Neotropical bats from Northeastern Brazil, with a particular focus on helminths and protozoa...
June 5, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29883574/successful-treatment-against-american-cutaneous-leishmaniasis-by-intralesional-infiltration-of-a-generic-antimonial-compound-lidocaine-combination-a-follow-up-study
#14
Néstor Añez, Agustina Rojas, José Vicente Scorza-Dagert, Carmen Morales
One hundred and twenty-two lesions caused by Leishmania braziliensis in 92 patients were treated using weekly intralesional (IL) infiltrations of a generic pentavalent antimonial compound, combined with local anesthetics. The topical therapy produced satisfactory healing in all the included patients, bearing from single-small ulcers to multiple or big lesions, after receiving an average 6 ± 3 IL infiltrations (90 mgSb5+ each). The rapid effect of this compound was demonstrated by the observed decrease of the Leishmania-amastigote population following microscopical grading in complicated ulcers after receiving two infiltrations...
June 5, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29859748/reproductive-aspects-of-chagas-disease-vectors-hemiptera-triatominae-with-anatomical-teratologies
#15
Kaio Cesar Chaboli Alevi, Yuri Augusto, Jader de Oliveira, Tiago Belintani, Lucas Abrantes da Silva, João Aristeu da Rosa, Maria Tercília Vilela de Azeredo Oliveira
As Chagas disease has no cure, vector control is the most effective method of preventing this neglected disease. Generally the anatomical teratologies are associated with hormonal dysfunction of the corpus allatum (juvenile hormone), presents genetic basis or unfavorable conditions, and are recessive and not sex linked. Thus, we characterize the male gonads and spermatogenesis of triatomines with anatomical teratologies to evaluate if the malformations interfere in the gametogenesis of these vectors. All teratogenic triatomines analyzed did not present presented gonadal dysgenesis and alterations in spermatogenesis...
May 31, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29859747/toxoplasmic-retinochoroiditis-caused-by-toxoplasma-gondii-strain-toxodb-65
#16
LETTER
Cinara Cássia Brandão de Mattos, Rubens Camargo Siqueira, Fábio Batista Frederico, Isabelle Martins Ribeiro Ferreira, Ana Iara Costa Ferreira, Mariana Previato, Vera Lucia Pereira-Chioccola, Luiz Carlos de Mattos
Ocular toxoplasmosis, caused by Toxoplasma gondii, is the most common cause of inflammation in the back of the eye. Analysis of the infecting strain may provide information regarding disease behavior and recurrence. Here, we describe clinical and epidemiological data for toxoplasmic retinochoroiditis in two Brazilian women infected by T. gondii strain toxoDB#65, living in an urban region of São Paulo State, Brazil.
May 31, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29856988/discriminating-lethal-concentrations-for-pyrethroid-compounds-used-in-susceptibility-monitoring-of-anopheles-epiroticus-a-malaria-vector-in-thailand
#17
Watcharin Phoomkhong, Michael J Bangs, Theeraphap Chareonviriyaphap
Anopheles epiroticus is a malaria vector in Thailand found primarily along coastal areas with brackish water habitats. Insecticides, particularly pyrethroid class compounds, are commonly used to control malaria vectors in Thailand. The lack of specific discriminating lethal concentrations for An. epiroticus has possibly compromised a more accurate assessment of physiological susceptibility to various chemicals. The routine assessment of vector response to insecticides is a key program management component to prevent or mitigate the development of resistance...
May 29, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29856987/the-invasive-asian-tiger-mosquito-aedes-albopictus-diptera-culicidae-in-the-czech-republic-repetitive-introduction-events-highlight-the-need-for-extended-entomological-surveillance
#18
Ivo Rudolf, Hana Blažejová, Petra Straková, Oldřich Šebesta, Juraj Peško, Jan Mendel, Silvie Šikutová, Zdeněk Hubálek, Helge Kampen, Francis Schaffner
In the framework of a regional collaborative project between authorities and scientists, evidence was found of repeated introduction of Aedes (Stegomyia) albopictus (Skuse) alongside the main road entrances (E461 and E65) connecting Austria and the Slovak Republic with the Czech Republic. In comparison to data from 2012 (17 specimens collected on three occasions), the seasons 2016 (66 specimens on ten occasions) and 2017 (90 specimens on eight occasions) show an apparent increase of introduction events as well as of mosquito numbers and underline the need for more intense surveillance activities...
May 29, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29856986/japanese-encephalitis-in-malaysia-an-overview-and-timeline
#19
REVIEW
Kiven Kumar, Siti Suri Arshad, Gayathri Thevi Selvarajah, Jalila Abu, Ooi Peck Toung, Yusuf Abba, A R Yasmin, Faruku Bande, Reuben Sharma, Bee Lee Ong
Japanese encephalitis (JE) is a vector-borne zoonotic disease caused by the Japanese encephalitis virus (JEV). It causes encephalitis in human and horses, and may lead to reproductive failure in sows. The first human encephalitis case in Malaya (now Malaysia) was reported during World War II in a British prison in 1942. Later, encephalitis was observed among race horses in Singapore. In 1951, the first JEV was isolated from the brain of an encephalitis patient. The true storyline of JE exposure among humans and animals has not been documented in Malaysia...
May 29, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29856985/exposure-of-a-diurnal-mosquito-vector-to-floral-mimics-foraging-responses-feeding-patterns-and-significance-for-sugar-bait-technology
#20
Hamady Dieng, Tomomitsu Satho, Nurul Atieqah Binti Arzemi, Nur Ezzati Aliasan, Fatimah Abang, Erida Wydiamala, Fumio Miake, Wan Fatma Zuharah, Nur Faeza A Kassim, Ronald E Morales Vargas, Noppawan P Morales, Gabriel Tonga Noweg
Food location by mosquitoes is mediated by resource-derived olfactory and visual signals. Smell sensation is intermittent and dependent on the environment, whereas visual signals are continual and precede olfactory cues. Success of mosquito bait technology, where olfactory cues are used for attraction, is being impeded by reduced attractiveness. Despite proof that mosquitoes respond to colored objects, including those mimicking floral shape, and that they can discriminate among flowers, the impacts of artificial flowers on foraging remain unexplored...
May 29, 2018: Acta Tropica
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