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Veterinary Parasitology

Pedro Mendoza-de-Gives, María Eugenia López-Arellano, Liliana Aguilar-Marcelino, Sara Olazarán-Jenkins, David Reyes-Guerrero, Gabriel Ramírez-Várgas, Vicente E Vega-Murillo
This research was performed to assess the Duddingtonia flagrans chlamydospore dose/response administered in gastrointestinal parasitic nematode (GIN) naturally infected calves and its effect in reducing the GIN infective larvae (L3 ) population in faeces in a cattle farm in the Mexican tropics. This study was carried out at the experimental research station "Las Margaritas" in Hueytamalco Municipality, Puebla State, Mexico. Forty zebu calves, between 6 to 12 months of age were randomly distributed into four groups of ten calves each...
January 31, 2018: Veterinary Parasitology
Dwight D Bowman
Parasitology is a relevant and integral part of veterinary medicine, and the WAAVP membership has skills ranging from morphological diagnostics and routine parasite control recommendations through the cutting edges of many disciplines, e.g., pharmacology, immunology, molecular biology and genomics. We regularly face a majority of students who want only the practical information useful the moment they enter the clinics. However, we are preparing them for careers lasting 30-50 years. Thus, we also must help them prepare for their futures...
March 15, 2018: Veterinary Parasitology
Josiel Borges Ferreira, Renato Diógenes Macedo Paiva, Ana Carla Diógenes Suassuna Bezerra, José Ernandes Rufino de Sousa, Débora Andréa Evangelista Façanha
Diagnosing the effects of helminth infections is an efficient way to manage the problem in ruminant production systems. Selection of animals in a flock that are infected with Haemonchus has traditionally involved differential packed cell volume measurements (PCV), and in recent years, the FAMACHA© system has been used. However, few small analytical changes have been made. The objective of this study was to examine the influence of different diagnoses linked to packed cell volume (PCV) and FAMACHA© system scores in native ewes, using a multivariate approach...
March 15, 2018: Veterinary Parasitology
Francisco Javier Navas González, Jordi Jordana Vidal, María Esperanza Camacho Vallejo, Jose Manuel León Jurado, Manuel Rafael de la Haba Giraldo, Cecilio Barba Capote, Juan Vicente Delgado Bermejo
Cutaneous habronematidosis (CH) is a highly prevalent seasonally recurrent skin disease that affects donkeys as a result from the action of spirurid stomach worm larvae. Carrier flies mistakenly deposit these larvae on previous skin lesions or on the moisture of natural orifices, causing distress and inflicting relapsing wounds to the animals. First, we carried out a meta-analysis of the predisposing factors that could condition the development of CH in Andalusian donkeys. Second, basing on the empirical existence of an inter and intrafamilial variation previously addressed by owners, we isolated the genetic background behind the hypersensibility to this parasitological disease...
March 15, 2018: Veterinary Parasitology
Weilin Zeng, Ling Sun, Zheng Xiang, Na Li, Jie Zhang, Yongshu He, Qing Li, Fang Yang, Jingling Song, James Morris, Benjamin M Rosenthal, Le Sun, Huaie Liu, Zhaoqing Yang
While Sarcocystis parasites from the muscles of donkey and horse have been characterized as different species, similarities between the parasites in these host raises questions about this assignment (Levine and Tadros, 1980; Matuschka, 1983; Odening et al., 1995b). To resolve this, we examined the tissue cysts of Sarcocystis collected from donkeys and horses were studied by morphological and molecular methods. Morphological studies performed by light microscopy (LM) revealed that each of two types of cysts were present in samples from each host type...
March 15, 2018: Veterinary Parasitology
D C K van Doorn, E R Nijsse, H W Ploeger
The Faculty of Veterinary Medicine at Utrecht University has seen three major curriculum changes, in 1995, 2001 and 2007. The last change was made because of the European change to a Bachelor-Master system. Almost each time teaching hours tagged for veterinary parasitology have been reduced to currently a minimum of between 46 and 51.5 h, which is much less than the WAAVP-recommended minimum of 70-90 h. This results in a challenge to maintain a qualitatively adequate veterinary parasitology program in a curriculum...
March 15, 2018: Veterinary Parasitology
Alexander G Maier
One of the allures of parasitology is its breadth of aspects spanning everything from molecules to ecosystems. Very few institutions have the capability to cover this breadth in educating parasitologists. As the national professional body, the Australian Society for Parasitology has developed a training course that aims to fill this gap. The course offers a comprehensive overview over the field, highlights the current research foci and introduces key methods. The program equips participants with an appreciation of parasites and with strategies to deal with the complexity of parasitological systems...
March 15, 2018: Veterinary Parasitology
Christina Strube, Katharina Raue, Elisabeth Janecek
One of the main goals in academia is, and has been, high quality education of students to provide theoretical and practical knowledge essential for professional life. Achieving this goal is highly dependent on teaching procedures and, consequently, on a constant adaptation of teaching styles to align to technical advances and cutting-edge topics. Technical advances can strongly influence teaching and learning in the complex subject area of veterinary parasitology. Today's students are provided with extensive, digital lecture notes, and e-learning offers including virtual microscope technology to independently obtain intensified theoretical knowledge and understanding...
March 15, 2018: Veterinary Parasitology
Guo-Hua Liu, Long-Xian Zhang, Feng-Cai Zou, Zi-Guo Yuan, Guang-Hui Zhao, Min Hu, Xun Suo, Xing-Quan Zhu
China has made significant achievements in social-economic development in the last three decades, and the numbers of livestock and companion animals are rapidly increasing. Some advances have been made in the control and prevention of animal parasitic diseases, but there are still some significant challenges, particularly in relation to foodborne parasitic zoonoses and vector-borne diseases. In addition, new molecular (e.g., genomic and transcriptomic) technologies have been developed and are gradually being introduced into the veterinary parasitology field...
March 15, 2018: Veterinary Parasitology
Elliott A Zieman, Clayton K Nielsen, F Agustín Jiménez
Cytauxzoon felis, and the resulting disease, cytauxzoonosis, is an emerging threat to domestic cats in the Midwest and Southeastern United States. Domestic cats that survive cytauxzoonosis (or are subclinically infected) are chronically infected with C. felis, yet to date, there is no information relative to chronic infections in bobcats, the natural reservoir. Over a period of 3.5 years (2014-2017), we captured and re-captured 5 bobcats in southern Illinois. One bobcat was captured each year of trapping, 1 was caught in the first and third year and 3 were recaptured approximately 1 year apart...
March 15, 2018: Veterinary Parasitology
Barend L Penzhorn
Finding a healthy balance between classical parasitology and clinical veterinary medicine remains a challenge. Veterinary parasitology, of vital interest in sub-Saharan Africa, has always featured prominently at the Faculty of Veterinary Science, University of Pretoria (founded in 1920). The faculty was initially an integral part of the Onderstepoort Veterinary Institute (OVI), and parasitology was taught by specialist researchers from OVI - a cult of total coverage prevailed. Presenting three separate courses - ectoparasitology, helminthology and protozoology - continued for many decades...
March 15, 2018: Veterinary Parasitology
Peter-Henning Clausen, Sandra Stelzer, Ard Nijhof, Jürgen Krücken, Georg von Samson-Himmelstjerna
The teaching of veterinary parasitology to the large number of students at the Freie Universität Berlin is mainly limited to conventional face-to-face lectures, supplemented by practical classes. Extensive parasite descriptions and diagnostic techniques are at the core of the practical classes, which are also intended to emphasise key biological and veterinary aspects covered in lectures. Further in-depth and specific learning is achieved within a detailed framework of elective courses, with defined learning outcomes for small groups of students, focusing on themes such as 'diagnosis and treatment of ectoparasites in companion animals' or 'zoonotic parasites'...
March 15, 2018: Veterinary Parasitology
Jiaqing Luo, Hongchao Sun, Xianfeng Zhao, Suhua Wang, Xunhui Zhuo, Yi Yang, Xueqiu Chen, Chaoqun Yao, Aifang Du
The immunochromatographic test (ICT) is a convenient and low-cost method that can rapidly obtain results (10 min) under normal conditions. In this study, we established an ICT assay with two monoclonal antibodies: TgSAG3-3A7 and TgSAG3-4D5 based on the conserved protein of TgSAG3 that can be expressed in all the infective stages of T. gondii. 20 nm gold particles were prepared and conjugated with TgSAG3-3A7 MAb at the concentration of 12.5 μg/mL. TgSAG3-4D5 MAb were used as the capture antibody because of its higher affinity tested by ELISA...
March 15, 2018: Veterinary Parasitology
D R B Brito, L M Costa-Júnior, J L Garcia, J F J Torres-Acosta, H Louvandini, J A A Cutrim-Júnior, J F M Araújo, E D S Soares
Gastrointestinal nematodes (GINs) cause considerable economic losses in grazing goat herds. At present, GIN control cannot rely on conventional anthelmintic (AH) drugs because parasites have developed resistance against such drugs. Thus, alternative control methods are being sought to reduce the dependence on AH. Many tannin-rich plants exhibit AH activity and may be used as alternatives for GIN control. Mimosa caesalpiniifolia is a tannin-rich shrub consumed by small ruminants in Brazil. This study evaluated the in vivo AH effect of M...
March 15, 2018: Veterinary Parasitology
Shijie Su, Zhaofeng Hou, Dandan Liu, Chuanli Jia, Lele Wang, Jinjun Xu, Jianping Tao
Eimeria necatrix is one of the most pathogenic parasites causing high mortality in chicken older than 8 weeks. Eimeria spp. possess a coccidian lifecycle including both sexual and asexual stages. Sexual differentiation and development occupies a central place in the life cycle of the Eimeria parasite. However, our knowledge of the sexual differentiation and gametocyte development of Eimeria is very limited. Here using RNA sequencing, we conducted a comparative transcriptome analysis between third-generation merozoites (MZ-3) and gametocytes (GAM) of E...
March 15, 2018: Veterinary Parasitology
Ajayta Rialch, O K Raina, Mary Nisha Tigga, Arun Anandanarayanan, Zamir Ali Ganaie, Andleeb Aftab, H Lalrinkima, M Norjit Singh, A Varghese, S Samanta, P S Banerjee, Praveen Singh, M R Verma
Three recombinant proteins of Echinococcus granulosus including two antigen B sub-units EgAgB8/1 and EgAgB8/2 and Echinococcus protoscolex calcium binding protein 1 (EPC1) were expressed in prokaryotic expression vectors. The diagnostic potential of these three recombinant proteins was evaluated in the detection of cystic echinococcosis in buffaloes in IgG-ELISA. The EgAgB8/1 and EgAgB8/2 recombinant proteins reacted fairly with the hydatid infected buffaloes with sensitivity of 75.0% and 78.6%, respectively and specificity of 75...
March 15, 2018: Veterinary Parasitology
Rocío Checa, Ana María López-Beceiro, Ana Montoya, Juan Pedro Barrera, Nieves Ortega, Rosa Gálvez, Valentina Marino, Julia González, Ángeles Sonia Olmeda, Luis Eusebio Fidalgo, Guadalupe Miró
Piroplasmosis is caused by several species of protozoa such as the Babesia microti-like piroplasm (Bml), an emerging blood protozoan also known as Theileria annae or Babesia vulpes. Infection by Bml was first reported in dogs in Spain where it is endemic today. Recently, a high prevalence of Bml has been increasingly detected in red foxes (Vulpes vulpes) in European countries. The objective of this study was to determine infection levels of this parasite in foxes from Galicia, NW Spain, and ticks species infestation in these carnivores, where they are so far unknown...
March 15, 2018: Veterinary Parasitology
Grace VanHoy, Michelle Carman, Greg Habing, Jeffrey Lakritz, C Austin Hinds, Andrew Niehaus, Ray M Kaplan, Antoinette E Marsh
Haemonchosis in camelids remains a challenging disease to treat, and prevention has become increasingly problematic due to widespread anthelmintic resistance. Barbervax® is an adjuvanted vaccine containing natural H-11, H-gal-GP antigens obtained from Haemonchus contortus adults via a proprietary process and solubilized in Quil A. This vaccine is approved for use in Australia, after demonstrating its safety and efficacy in sheep and goats. There are no published studies evaluating Barbervax in other ruminants/pseudoruminants such as camelids which can be parasitized with H...
March 15, 2018: Veterinary Parasitology
Víctor Hugo Del Río-Araiza, Karen Elizabeth Nava-Castro, Fernando Alba-Hurtado, Andrés Quintanar-Stephano, Marco Antonio Muñoz-Guzmán, Olga CUenca-Micò, Jorge Morales-Montor
Toxocara canis is the helminth causing Toxocariasis, a parasitic disease with medical and veterinary implications. Their final host are members of the family Canidae and as paratenic hosts, most of the mammals are sensitive (man, rat, mouse, among others). It has been reported that a pituitary hormone, prolactin, it is responsible for reactivation and migration of larvae to the uterus and mammary gland during the last third of gestation in bitches. In addition, this hormone has been shown to play an important role in the regulation of the immune response...
March 15, 2018: Veterinary Parasitology
Remigiusz Gałęcki, Rajmund Sokół
There are no standard guidelines for the treatment of cryptosporidiosis in reptiles. The aim of this study was to evaluate the efficacy of two cryptosporidiosis therapies in captive green iguanas. Eight green iguanas aged 2-6 years, including 6 (1 ♂ and 5 ♀) animals with chronic diarrhea, received treatment for cryptosporidiosis. The presence of Cryptosporidium sp. oocysts was determined in 8 iguanas (100%), Isospora sp. oocysts were detected in 3 animals (37.5%), and Oxyuridae eggs were observed in 5 iguanas (62...
March 15, 2018: Veterinary Parasitology
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