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Parasitology

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https://www.readbyqxmd.com/read/28327800/trypanosoma-cruzi-i-genotype-among-isolates-from-patients-with-chronic-chagas-disease-followed-at-the-evandro-chagas-national-institute-of-infectious-diseases-fiocruz-brazil
#1
Tatiana da Silva Fonseca de Oliveira, Barbara Neves Dos Santos, Tainah Silva Galdino, Alejandro Marcel Hasslocher-Moreno, Otilio Machado Pereira Bastos, Maria Auxiliadora de Sousa
INTRODUCTION: Trypanosoma cruzi is the etiologic agent of Chagas disease in humans, mainly in Latin America. Trypanosome stocks were isolated by hemoculture from patients followed at Evandro Chagas National Institute of Infectious Diseases (FIOCRUZ) and studied using different approaches. METHODS: For species and genotype identification, the stocks were analyzed by parasitological techniques, polymerase chain reaction assays targeted to specific DNA sequences, isoenzyme patterns, besides sequencing of a polymorphic locus of TcSC5D gene (one stock)...
January 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28327145/diagnostic-challenges-and-case-management-of-the-first-imported-case-of-plasmodium-knowlesi-in-sri-lanka
#2
A Dewanee Ranaweera, Manjula N Danansuriya, Kusumawathie Pahalagedera, W M Kumudunayana T de A W Gunasekera, Priyani Dharmawardena, Keng Wai Mak, Pei-Sze Jeslyn Wong, Mei-Zhi Irene Li, Cheong Huat Tan, Hapuarachchige C Hapuarachchi, Hema D B Herath, Deepika Fernando
BACKGROUND: Sri Lanka has achieved 'malaria-free' status and is now in the phase of prevention of re-introduction of malaria. Imported malaria remains a challenge to resurgence of the disease. The diagnostic challenges encountered and the rapid response initiated to manage a Plasmodium infection, which was later confirmed as Plasmodium knowlesi, the first reported case from Sri Lanka, is discussed. CASE PRESENTATION: An army officer who returned from Malaysia in October 2016 was found to be positive for Plasmodium both by microscopy and rapid diagnostic test (RDT) by the Anti Malaria Campaign Sri Lanka (AMC) during his third visit to a health care provider...
March 21, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28325516/scabietic-vasculitis-report-of-2-cases
#3
C Clevy, D Brajon, E Combes, M Benzaquen, J-P Dales, M-C Koeppel, P Berbis
BACKGROUND: The infectious causes of cutaneous vasculitis are well known and include streptococcal infections among others. Cases resulting from parasitic infection are less frequent. Scabies, which is currently on the increase, has only been reported in a few isolated cases. Herein, we report two noteworthy cases of profuse scabies complicated by cutaneous vasculitis. PATIENTS AND METHODS: Case 1: a 90-year-old woman, residing in a nursing home, was admitted to our dermatology department complaining of pruritus, present for one month, predominantly on the inside of the thighs and on the buttocks, associated with purpuric lesions on the lower limbs...
March 18, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28325173/patterns-and-processes-influencing-helminth-parasites-of-arctic-coastal-communities-during-climate-change
#4
K V Galaktionov
This review analyses the scarce available data on biodiversity and transmission of helminths in Arctic coastal ecosystems and the potential impact of climate changes on them. The focus is on the helminths of seabirds, dominant parasites in coastal ecosystems. Their fauna in the Arctic is depauperate because of the lack of suitable intermediate hosts and unfavourable conditions for species with free-living larvae. An increasing proportion of crustaceans in the diet of Arctic seabirds would result in a higher infection intensity of cestodes and acanthocephalans, and may also promote the infection of seabirds with non-specific helminths...
March 22, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28321217/a-vaccine-therapy-for-canine-visceral-leishmaniasis-promoted-significant-improvement-of-clinical-and-immune-status-with-reduction-in-parasite-burden
#5
Bruno Mendes Roatt, Rodrigo Dian de Oliveira Aguiar-Soares, Levi Eduardo Soares Reis, Jamille Mirelle de Oliveira Cardoso, Fernando Augusto Siqueira Mathias, Rory Cristiane Fortes de Brito, Sydnei Magno da Silva, Nelder De Figueiredo Gontijo, Sidney de Almeida Ferreira, Jesus G Valenzuela, Rodrigo Corrêa-Oliveira, Rodolfo Cordeiro Giunchetti, Alexandre Barbosa Reis
Herein, we evaluated the treatment strategy employing a therapeutic heterologous vaccine composed of antigens of Leishmania braziliensis associated with MPL adjuvant (LBMPL vaccine) for visceral leishmaniasis (VL) in symptomatic dogs naturally infected by Leishmania infantum. Sixteen dogs received immunotherapy with MPL adjuvant (n = 6) or with a vaccine composed of antigens of L. braziliensis associated with MPL (LBMPL vaccine therapy, n = 10). Dogs were submitted to an immunotherapeutic scheme consisting of 3 series composed of 10 subcutaneous doses with 10-day interval between each series...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28314677/vulvovaginal-candidiasis-etiology-symptomatology-and-risk-factors
#6
L Mtibaa, N Fakhfakh, A Kallel, S Belhadj, N Belhaj Salah, N Bada, K Kallel
OBJECTIVE: To determine epidemiological, clinical and mycological characteristics of vulvovaginal candidiasis (VVC) in Tunisian population and to evaluate predisposing factors. PATIENTS AND METHODS: In this retrospective study, 2160 vaginal swabs were performed over 2 years (January 2014-December 2015). It was carried out at the laboratory of Parasitology and Mycology, Rabta Hospital in Tunisia. After swab collecting, direct examination and culture on Sabouraud Chloramphenicol and Sabouraud Chloramphenicol Actidione media were implemented to research yeasts...
March 14, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28303600/the-study-of-biochemical-profile-of-cyst-fluid-and-diffusion-weighted-magnetic-resonance-imaging-in-differentiating-hepatic-hydatid-cysts-from-liver-simple-cysts
#7
Wang Shanshan, Li Hui, Liu Yan, Wang Li, Ren Yongfang, Wang Yan, Muhetarjiang Kader, Jia Wenxiao
PURPOSE: The aim of this study was to investigate the value of biochemical profile of cyst fluid and diffusion-weighted imaging (DWI) in differentiating hepatic hydatid cysts (HCs) from liver simple cysts. MATERIALS AND METHODS: Forty-six patients underwent MR imaging. Twenty-nine patients had 29 hydatid cysts and 17 patients had liver simple cysts. Thirteen patients with hydatid cysts and seven patients with liver simple cysts were evaluated with cyst fluid biochemical analysis...
March 17, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28300558/therapeutic-efficacy-of-chloroquine-for-the-treatment-of-plasmodium-vivax-malaria-among-outpatients-at-shawa-robit-health-care-center-north-east-ethiopia
#8
Seble Seifu, Ahmed Zeynudin, Endalew Zemene, Sultan Suleman, Abdissa Biruksew
Nearly 40% of all malaria infection in Ethiopia is caused by Plasmodium vivax (P. vivax). Chloroquine (CQ) is the first line treatment for confirmed P. vivax malaria in the country. However, the efficacy of this drug has been compromised by CQ resistant P. vivax (CRPv) strains. Therefore, the present study was aimed at assessing the therapeutic efficacy of CQ for treatment of P. vivax malaria at Shawa Robit Health Care Centre, North-Ease Ethiopia. A one-arm, 28-day follow-up, in vivo therapeutic efficacy study was conducted from October 2013 to February 2014...
March 11, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28293445/microscopic-and-molecular-detection-of-camel-piroplasmosis-in-gadarif-state-sudan
#9
Abdalla Mohamed Ibrahim, Ahmed A H Kadle, Hamisi Said Nyingilili
The socioeconomic importance of camels (Camelus dromedarius) could not be neglected in the Sudan. The present study was planned to confirm the presence of piroplasmosis in camels from the Eastern region of the Sudan (Gedarif State) using microscopical (blood film) and molecular technique (PCR). A total of 55 camels of different sexes (34 females and 21 males) were sampled from four localities of the state between January 2011 and January 2012. The prevalence rates using parasitological and molecular examinations were 43...
2017: Veterinary Medicine International
https://www.readbyqxmd.com/read/28293411/a-strange-manifestation-of-malaria-in-a-native-nigerian-boy
#10
Paola Magro, Ilaria Izzo, Barbara Saccani, Salvatore Casari, Silvio Caligaris, Lina Rachele Tomasoni, Alberto Matteelli, Annamaria Lombardi, Antonella Meini, Francesco Castelli
The protective role of Sickle Cell Trait (SCT) in malaria endemic areas has been proved, and prevalence of HbS gene in malaria endemic areas is high. Splenic infarction is a well-known complication of SCT, while the association with malaria is considered rare. A Nigerian boy was admitted to our ward after returning from his country of origin, for P. falciparum malaria. He underwent abdominal ultrasound for upper right abdominal pain, showing cholecystitis and multiple splenic lesions suggestive of abscesses...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28292316/efficacy-safety-and-tolerance-of-imidocarb-dipropionate-versus-atovaquone-or-buparvaquone-plus-azithromycin-used-to-treat-sick-dogs-naturally-infected-with-the-babesia-microti-like-piroplasm
#11
Rocío Checa, Ana Montoya, Nieves Ortega, José Luis González-Fraga, Adrián Bartolomé, Rosa Gálvez, Valentina Marino, Guadalupe Miró
BACKGROUND: Piroplasmosis caused by the Babesia microti-like piroplasm (Bml) is increasingly being detected in dogs in Europe. Sick dogs show acute disease with severe anaemia associated with thrombocytopenia with a poor response to current available drugs. This study assesses the safety and tolerance of three treatments and compares their efficacy over a full year of follow up in dogs naturally infected with Bml. METHODS: Fifty-nine dogs naturally infected with Bml were randomly assigned to a treatment group: imidocarb dipropionate (5 mg/kg SC, 2 doses 14 d apart) (IMI); atovaquone (13...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28289262/uncertain-links-in-host-parasite-networks-lessons-for-parasite-transmission-in-a-multi-host-system
#12
Josephine G Walker, Michaela Plein, Eric R Morgan, Peter A Vesk
For many parasites, the full set of hosts that are susceptible to infection is not known, and this could lead to a bias in estimates of transmission. We used counts of individual adult parasites from historical parasitology studies in southern Africa to map a bipartite network of the nematode parasites of herbivore hosts that occur in Botswana. Bipartite networks are used in community ecology to represent interactions across trophic levels. We used a Bayesian hierarchical model to predict the full set of host-parasite interactions from existing data on parasitic gastrointestinal nematodes of wild and domestic ungulates given assumptions about the distribution of parasite counts within hosts, while accounting for the relative uncertainty of less sampled species...
May 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28288771/cattle-breeding-trypanosomosis-prevalence-and-drug-resistance-in-northern-togo
#13
E Tchamdja, A E Kulo, H S Vitouley, K Batawui, A A Bankolé, K Adomefa, G Cecchi, A Hoppenheit, P H Clausen, R De Deken, J Van Den Abbeele, T Marcotty, V Delespaux
African Animal Trypanosomosis (AAT) is a major disease of cattle in Togo and its control is essentially based on chemotherapy. However, because of excessive use of trypanocides during the past decades, chemo-resistance in the parasites has developed. In order to assess the current situation of AAT and resistance to trypanocidal drugs in Northern Togo, a study was conducted on cattle from December 2012 to August 2013 in the regions of Kara and Savanes. An initial cross-sectional survey was carried out in 40 villages using the Haematocrit Centrifugation Technique (HCT)...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28288767/the-route-of-administration-drastically-affects-ivermectin-activity-against-small-strongyles-in-horses
#14
Carlos Saumell, Adrián Lifschitz, Renato Baroni, Luis Fusé, Mariana Bistoletti, Federica Sagües, Santiago Bruno, Gustavo Alvarez, Carlos Lanusse, Luis Alvarez
The goal of the current study was to evaluate the comparative efficacy of ivermectin (IVM) against small strongyles (cyathostomins) following its oral and intramuscular (IM) administration, in naturally parasitized horses. The parasitological data were complemented with the assessment of the plasma disposition kinetics of IVM. The trial included two different experiments. In experiment I, 40 horses naturally infected with small strongyles were randomly allocated into four experimental groups (n=10) and treated with IVM (0...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28288752/encysted-cyathostomin-larvae-in-foals-progression-of-stages-and-the-effect-of-seasonality
#15
Martin K Nielsen, Eugene T Lyons
Cyathostomins (small strongyles) are ubiquitous in grazing horses and are known pathogens as cause of larval cyathostominosis. As part of their life cycle, cyathostomin larvae invade the mucosal walls of the large intestines and undergo encystment. Newly ingested third stage larvae are known to undergo arrested development and this can lead to an accumulation of encysted burdens over the course of a grazing season. It is believed that the host immune system plays a significant role in triggering this arrestment...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28288670/histological-and-parasitological-distinctive-findings-in-clinically-lesioned-and-normal-looking-skin-of-dogs-with-different-clinical-stages-of-leishmaniosis
#16
Laura Ordeix, Annabel Dalmau, Montsant Osso, Joan Llull, Sara Montserrat-Sangrà, Laia Solano-Gallego
BACKGROUND: Normal-looking skin of dogs with leishmaniosis frequently shows microscopic lesions along with the presence of Leishmania amastigotes. However, histological lesions with or without detection of amastigotes might not occur in less severe clinical cases. In addition, comparative studies between paired clinically-lesioned and normal-looking skin samples from dogs with different disease severity are lacking. The objective of this study was to compare histological and parasitological findings by Leishmania immunohistochemistry (IHC) and quantitative PCR (qPCR) on paired clinically-lesioned and normal-looking skin biopsies from 25 dogs with different clinical stages of leishmaniosis, 11 with stage I-mild disease (papular dermatitis) and 14 with stage II-III (ulcerative or exfoliative dermatitis)...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28286526/parasitological-indices-of-malaria-transmission-in-children-under-fifteen-years-in-two-ecoepidemiological-zones-in-southwestern-burkina-faso
#17
Aristide S Hien, Ibrahim Sangaré, Sanata Coulibaly, Moussa Namountougou, Léa Paré-Toé, Anicet Georges Ouédraogo, Abdoulaye Diabaté, Brian D Foy, Roch K Dabiré
Twenty years after the latest publications performed on the parasitological indices of malaria transmission in northwest of the second city of Burkina Faso, it was important to update the epidemiological profile of malaria in children under the age of 15 years. The objective of this study was to determine and compare the parasitological parameters of malaria transmission by season, area, and age in the two zones (rice and savanna) in the northwest of Bobo-Dioulasso, Burkina Faso. Overall, the results showed that there was no significant difference in the parasitological indices of malaria transmission within children under fifteen years between the rice site and the savannah site and whatever the season (P > 0...
2017: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28282407/potential-disease-agents-in-domestic-goats-and-relevance-to-bighorn-sheep-ovis-canadensis-management
#18
Mark L Drew, Glen C Weiser
Domestic goats are raised for meat, milk and hair production, in herds for rangeland weed control, and as pack animals. Domestic sheep, goats and wild bighorn sheep are all susceptible to a multifactorial pneumonia. We sampled 43 herd goats from 7 herds and 48 pack goats from 11 herds for viral and bacterial serology, parasitology, and Pasteurellaceae microbiology. The goats in this study were in generally good health, although most goats did harbor various pathogens and parasites including several bacteria, specifically Pasteurellaceae, which have been associated with pneumonia in free-ranging bighorn sheep...
2017: PloS One
https://www.readbyqxmd.com/read/28279779/effects-of-mate-separation-in-female-and-social-isolation-in-male-free-living-greylag-geese-on-behavioural-and-physiological-measures
#19
Sonja C Ludwig, Katharina Kapetanopoulos, Kurt Kotrschal, Claudia A F Wascher
The presence of a social partner may significantly contribute to coping with stressful events, whereas dyadic separation generally increases glucocorticoid levels and, thereby, might also affect immune function and health. To study the covariation between social factors, immuno-reactive corticosterone metabolites, haematology and parasite product excretion patterns in a free-living, long-term monogamous bird, we separated pair mates in Greylag geese (Anser anser). We isolated the males of eight pairs for 48h to examine behavioural, adrenocortical, haematological and parasitological responses to mate removal in the female partners, and to social isolation in the males...
March 6, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28279455/modelling-the-elimination-of-river-blindness-using-long-term-epidemiological-and-programmatic-data-from-mali-and-senegal
#20
Martin Walker, Wilma A Stolk, Matthew A Dixon, Christian Bottomley, Lamine Diawara, Mamadou O Traoré, Sake J de Vlas, María-Gloria Basáñez
The onchocerciasis transmission models EPIONCHO and ONCHOSIM have been independently developed and used to explore the feasibility of eliminating onchocerciasis from Africa with mass (annual or biannual) distribution of ivermectin within the timeframes proposed by the World Health Organization (WHO) and endorsed by the 2012 London Declaration on Neglected Tropical Diseases (i.e. by 2020/2025). Based on the findings of our previous model comparison, we implemented technical refinements and tested the projections of EPIONCHO and ONCHOSIM against long-term epidemiological data from two West African transmission foci in Mali and Senegal where the observed prevalence of infection was brought to zero circa 2007-2009 after 15-17 years of mass ivermectin treatment...
March 2017: Epidemics
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