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Acta Tropica

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https://www.readbyqxmd.com/read/28433574/serodiagnosis-of-toxoplasmosis-the-effect-of-measurement-of-igg-avidity-in-pregnant-women-in-rabat-in-morocco
#1
Majda Laboudi, Abderrahim Sadak
BACKGROUND: The diagnosis of toxoplasmosis in pregnant women during the early first trimester of pregnancy is very important for preventing congenital infection of the fetus; it will not only prevent the risk of transmitting the infection to the fetus but it will also enable to give these women a preventive treatment. In this study, the avidity test was performed on pregnant women during their first prenatal visit at the National Institute of Hygiene in Rabat, Morocco. FINDINGS: One hundred and twenty-eight sera samples were collected from 128 pregnant women between august 2015 and June 2016; these women were chosen retrospectively and were in their first 4 months of pregnancy...
April 19, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28433573/rodents-as-a-reservoir-of-infection-caused-by-multiple-zoonotic-species-genotypes-of-c-parvum-c-hominis-c-suis-c-scrofarum-and-the-first-evidence-of-c-muskrat-genotypes-i-and-ii-of-rodents-in-europe
#2
REVIEW
Oľga Danišová, Alexandra Valenčáková, Michal Stanko, Lenka Luptáková, Elena Hatalová, Alexander Čanády
Cryptosporidium spp. is an important causative agent of intestinal parasitoses-induced diarrhoea in humans and animals worldwide. Rodents (small mammals), the main reservoir of infections, are globally expanded and overpopulated, which increases the risk of transfer of human and zoonotic pathogens from the genus Cryptosporidium. In this study, Cryptosporidium was detected in wild immunocompetent asymptomatic small mammals. Altogether 262 faecal samples were collected from five areas in eastern Slovakia from four different rodent species (Myodes glareolus, Apodemus agrarius, Apodemus flavicollis, Rattus norvegicus), eight samples originated from two insectivore species (Sorex araneus, Crocidura suaveolens) and two sample from a carnivore Mustela nivalis...
April 19, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28433572/descriptions-of-the-female-and-larva-of-simulium-gomphostilbia-udomi-diptera-simuliidae-from-thailand-and-its-transfer-to-the-simulium-asakoae-species-group
#3
Atiporn Saeung, Wichai Srisuka, Van Lun Low, Wanchai Maleewong, Hiroyuki Takaoka
The female and larva of Simulium (Gomphostilbia) udomi Takaoka & Choochote from Thailand are described for the first time. The female of this species is similar to those of S. (G.) asakoae Takaoka & Davies from Peninsular Malaysia, Thailand, Hong Kong and Vietnam, and S. (G.) chiangdaoense Takaoka & Srisuka from Thailand. The larva of this species is similar to S. (G.) curtatum Jitklang et al. and S. (G.) nr. asakoae 2 from Thailand in having a medium-long postgenal cleft. Taxonomic notes are given to separate this species from these related species...
April 19, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427965/t1-st2-deficient-mice-display-protection-against-leishmania-infantum-experimental-infection
#4
Khalid Eltahir Khalid, Manuela Sales, Laís Sacramento, Diego L Costa, Djalma de Souza, Vanessa Carregaro, Joao Santana da Silva
T1/ST2 is a surface marker selectively expressed on type 2 helper (TH2) effector cells. As Leishmania infection in susceptible BALB/c mice have ascribed to a polarized TH2 response, this study aim to investigate the T1/ST2 (the receptor for IL-33), as a typical TH2 marker in the postulation that a shift towards a beneficial TH1 response would occur in the absence of ST2. For this, ST2 knockout (ST2(-/-)) and WT BALB/c mice were experimentally infected in the retro-orbital sinus with L. infantum. We showed that ST2(-/-) animals displayed better control of parasite burden in both spleen and liver tissues at different time points of chronic phases, and reduced spleenomegaly and hepatomegaly compared with the wild-type (WT) mice...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427964/scanning-electron-microscopic-studies-on-antenna-of-hemipyrellia-ligurriens-wiedemann-1830-diptera-calliphoridae-a-blow-fly-species-of-forensic-importance
#5
Garima Hore, Aniruddha Maity, Atanu Naskar, Waliza Ansar, Shyamasree Ghosh, Goutam Kumar Saha, Dhriti Banerjee
Blow flies (Diptera: Calliphoridae) are one of the foremost organisms amongst forensic insects to colonize corpses shortly after death, thus are of immense importance in the domain of forensic entomology. The blow fly Hemipyrellia ligurriens (Wiedemann, 1830) (Diptera: Calliphoridae) is considered as a forensically important fly species globally and is also known for its medical and veterinary importance. In the present study, we report for the first time scanning electron microscopic studies on the morphology of sensilla of antenna of adult male and female of H...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427963/molecular-investigation-of-piroplasma-infection-in-white-yaks-bos-grunniens-in-gansu-province-china
#6
Sitong Li, Junlong Liu, Aihong Liu, Youquan Li, Shuqing Wang, Shufang Wang, Hong Yin, Jianxun Luo, Guiquan Guan
Piroplasmosis, including theileriosis and babesiosis, is a tick-borne haemoprotozoan disease responsible for huge economic losses to livestock industry. In China, the biology of piroplasms infective to cattle was well understood on the basis of pathogen isolations and molecular epidemiological surveys in the past few decades. But very limited information about the infection status of piroplasms in white yak (Bos grunniens), a semi-wild and endemic breed, has been recorded, so far. A total of 350 blood samples was collected from white yaks in 11 towns of Tianzhu Tibetan Autonomous County of Gansu province, China, during April to July 2015...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427962/first-report-of-a-rickettsia-asembonensis-related-infecting-fleas-in-brazil
#7
Arannadia Barbosa Silva, Vinicius Figueiredo Vizzoni, Andréa Pereira Costa, Francisco Borges Costa, Jonas Moraes-Filho, Marcelo Bahia Labruna, Gilberto Salles Gazêta, Rita de Maria Seabra Nogueira
The present study was performed in a non-endemic area for spotted fever (SF) in Imperatriz microregion, state of Maranhão, Brazil. Blood samples and ectoparasites were collected from 300 dogs of the Imperatriz microregion. Canine serum samples were tested individually by indirect immunofluorescence assay (IFA), using five Rickettsia isolates from Brazil. Antibodies reactive to at least one of the five species of Rickettsia were detected in 1.6% of the dogs (5/300). These sera were considered reactive to Rickettsia rickettsii and Rickettsia amblyommatis or very closely related species...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427961/evidence-for-enzootic-circulation-of-rift-valley-fever-virus-among-livestock-in-cameroon
#8
M Rissmann, M Eiden, A Wade, R Poueme, S Abdoulkadiri, H Unger, U Ziegler, T Homeier, M H Groschup
Rift Valley fever virus (RVFV) is an arthropod-borne pathogen, causing serious epidemics in Africa and the Arabian Peninsula. In Cameroon serological data indicate the presence of RVFV, but active circulation of RVFV, causing clinical infections has not been proven yet. For this purpose we carried out a serological and molecular study on a total of 1,953 randomly selected serum samples of small ruminants and cattle, which were collected in years 2013 and 2014 in Cameroon. In a first step, sera were screened serologically using a variety of assay formats to reveal RVFV specific antibodies...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427960/construct-and-expression-of-recombinant-domains-i-ii-of-dengue-virus-2-and-its-efficacy-to-evaluate-immune-response-in-endemic-area-possible-use-in-prognosis
#9
Alfredo Eduardo Montes-Gómez, Hector Vivanco-Cid, José Bustos-Arriaga, Mussaret Bano Zaidi, Jazmin Garcia Machorro, Benito Gutierrez-Castañeda, Leticia Cedillo-Barron
The envelope (E) protein from DENV, contain three functional and structural domains (DI, DII and DIII). Some studies suggest that neutralizing antibodies during natural DENV infection are predominantly against DI and DII, in contrast, low proportion of the antibodies were against DIII. Thus it is necessary to establish the proportion of human antibodies against DENV E protein that bind to DI and DII during the normal course of infection; as an indicator of the quality of the antibody response and to further design new vaccine candidates for DENV...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427959/beneficial-effects-of-heparin-and-l-arginine-on-dermonecrosis-effect-induced-by-vipera-lebetina-venom-involvement-of-no-in-skin-regeneration
#10
Nouara Bennacef-Heffar, Fatima Laraba-Djebari
It is well known that snake venoms such as Viperidae caused severe local effects such as hemorrhage, myonecrosis and dermonecrosis which can lead to permanent tissue loss or the disability. The aim of this study is to evaluate the skin regeneration using heparin and l-arginine as well as the dermonecrotic effects induced by Vipera lebetina venom (VLV). To better understand the toxic effects induced by VLV and to prevent or treat these effects, we evaluate the local effects and the skin regeneration with or without drugs...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427958/micro-anatomical-changes-in-major-blood-vessel-caused-by-dengue-virus-serotype-2-infection
#11
Sivan Padma Priya, S Sakinah, Mok Pooi Ling, Hui-Yee Chee, Akon Higuchi, Rukman Awang Hamat, Vasantha Kumari Neela, Abdullah A Alarfaj, Murugan A Munusamy, Ashraf A Hatamleh, Ahmed E Al-Sabri, Ibrahim Ahmad Abdulaziz Al-Suwailem, Mariappan Rajan, Giovanni Benelli, Marlina, S Suresh Kumar
Dengue virus (DENV) has emerged as a major economic concern in developing countries, with 2.5 billion people believed to be at risk. Vascular endothelial cells (ECs) lining the circulatory system from heart to end vessels perform crucial functions in the human body, by aiding gas exchange in lungs, gaseous, nutritional and its waste exchange in all tissues, including the blood brain barrier, filtration of fluid in the glomeruli, neutrophil recruitment, hormone trafficking, as well as maintenance of blood vessel tone and hemostasis...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427957/pcr-based-identification-of-trypanosoma-lewisi-and-trypanosoma-musculi-using-maxicircle-kinetoplast-dna
#12
Xiao-Kun Hong, Xuan Zhang, Octavio Alejandro Fusco, You-Gen Lan, Zhao-Rong Lun, De-Hua Lai
Trypanosoma lewisi, transmitted by rat fleas, is a widespread pathogen specific to rats with records of human infection cases. Its closely related species with global distribution, Trypanosoma musculi, is transmitted between mice by ingestion of infected fleas. These trypanosomes are of similar morphology, making it difficult to distinguish them by microscopy. In this study, we have developed a rapid, sensitive and reliable PCR method for the diagnosis of T. lewisi and T. musculi. The T. lewisi-specific amplicons were not produced by other Trypanosoma, such as T...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28414028/culex-culiciomyia-sasai-diptera-culicidae-senior-synonym-of-cx-spiculothorax-and-a-new-country-record-for-bhutan
#13
Thanari Phanitchakun, Parinya Wilai, Jassada Saingamsook, Rinzin Namgay, Tobgyel Drukpa, Yoshio Tsuda, Catherine Walton, Ralph E Harbach, Pradya Somboon
Culex (Culiciomyia) spiculothorax was described from Thailand based on the presence of spiculation on the thorax of larvae. Adult females are characterized but are indistinguishable from those of related species, such as Cx. pallidothorax. Phylogenetic analysis of mitochondrial oxidase subunit I (COI) sequences revealed that specimens identified as Cx. spiculothorax from Thailand, Japan and Bhutan form a single clade with Cx. sasai from Japan (Kimura 2-parameter genetic distances 0-0.9%) that is clearly distinct from clades comprised of other species of subgenus Culiciomyia...
April 13, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28412048/comparative-proteome-profiling-of-hydatid-fluid-from-algerian-patients-reveals-cyst-location-related-variation-in-echinococcus-granulosus
#14
Razika Zeghir-Bouteldja, Andy Polomé, Sabrina Bousbata, Chafia Touil-Boukoffa
Human cystic echinococcosis, an endemic zoonosis in Algeria, is caused by larvae of the cestode Echinococcus granulosus. Parasitic modulation of the immune response allows E. granulosus to persist in intermediate hosts. Previous in vitro and in vivo immunological studies have shown differences in host immune responses according to the status and location of the hydatid cysts in the body. In this study, a proteomic analysis of human hydatid fluids was performed to identify the proteins in hydatid cyst fluids...
April 13, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28408098/population-genetics-of-the-schistosoma-snail-host-bulinus-truncatus-in-egypt
#15
Rima Zein-Eddine, Félicité F Djuikwo-Teukeng, Yasser Dar, Gilles Dreyfuss, Frederik Van den Broeck
The tropical freshwater snail Bulinus truncatus serves as an important intermediate host of several human and cattle Schistosoma species in many African regions. Despite some ecological and malacological studies, there is no information on the genetic diversity of B. truncatus in Egypt. Here, we sampled 70-100 snails in ten localities in Upper Egypt and the Nile Delta. Per locality, we sequenced 10 snails at a partial fragment of the cytochrome c oxidase subunit 1 gene (cox1) and we genotyped 25-30 snails at six microsatellite markers...
April 10, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28399990/corrigendum-to-proteome-profiling-of-the-growth-phases-of-leishmania-pifanoi-promastigotes-in-axenic-culture-reveals-differential-abundance-of-immunostimulatory-proteins-acta-trop-158-2016-240-247
#16
Pedro J Alcolea, Ana Alonso, Francisco García-Tabares, María Carmen Mena, Sergio Ciordia, Vicente Larraga
No abstract text is available yet for this article.
April 8, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28377222/characterization-of-the-zoonotic-potential-of-toxoplasma-gondii-in-horses-from-rio-de-janeiro-state
#17
Sabrina S Venturi, Andressa F da Silva, Edwards Frazão-Teixeira, Francisco C R de Oliveira, Angélica Consalter, Felipe G F Padilha, Ana Beatriz M Fonseca, Ana M Reis Ferreira
The aim of this study was to perform a survey on the prevalence of anti-Toxoplasma gondii antibodies in horses from Rio de Janeiro State, Brazil. From 2012 to 2013, a total of 624 blood samples were collected from horses from the eight regions comprising Rio de Janeiro State (Baixadas Litorâneas, Serrana, Norte Fluminense, Noroeste Fluminense, Centro-Sul, Metropolitana, Médio Paraíba, and Costa Verde). All sera samples were tested for anti-T. gondii antibodies by performing the modified agglutination test with a cut-off of 1:25...
April 2, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28377221/risk-factors-for-schistosomiasis-transmission-among-school-children-in-gwanda-district-zimbabwe
#18
Zibusiso Nyati-Jokomo, Moses J Chimbari
INTRODUCTION: A nationwide cross sectional Schistosomiasis survey conducted in 2011 in 280 primary schools found a prevalence rate of 22.7%. This warranted an intervention with mass drug administration at all schools in line with WHO guidelines. This study aimed to identify risk factors for Schistosomiasis transmission among Grade 3 children at two primary schools in Gwanda district. METHODS: A descriptive cross sectional survey which was part of a larger study on Malaria and Bilharzia in Southern Africa (MABISA) was conducted...
April 1, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28377220/estimating-occurrence-of-strongyloides-stercoralis-in-the-caribbean-island-countries-implications-for-monitoring-and-control
#19
Jennifer K Ketzis, Anne Conan
BACKGROUND: Few data are available for the prevalence of Strongyloides stercoralis in the Caribbean region. This frequently under diagnosed soil-transmitted helminth (STH) can result in long-term low intensity chronic infections that are asymptomatic or can cause varied intestinal disturbances. With autoinfections, infections lasting over 60 years can occur and hyperinfections lead to high morbidity and mortality. METHODOLOGY/PRINCIPAL FINDINGS: Historical literature was searched to determine the prevalence of S...
April 1, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28377219/first-record-of-aedes-albopictus-skuse-1894-on-s%C3%A3-o-tom%C3%A3-island
#20
Sandra Reis, Anthony J Cornel, Martim Melo, Hugo Pereira, Claire Loiseau
Biological invasions have critical impacts on native biodiversity and human societies and especially on oceanic islands that are fragile and threatened ecosystems. The invasive tiger mosquito Aedes (Stegomyia) albopictus (Skuse, 1894) native to Southeast Asia has been introduced during the past 30 years almost everywhere in the world, including the Americas, the Pacific, Europe and Africa. It has been reported for the first time in the Gulf of Guinea in 2000, first in Cameroon, then in Bioko Island in 2003 and more recently in Gabon in 2007...
April 1, 2017: Acta Tropica
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