Parasitology Research (Parasitol Res)

Publisher: Springer Verlag

Journal description

Organ der Deutschen Gesellschaft für Parasitologie An international journal on parasitology that includes General Biological Medical and Veterinary Parasitology Protozoology Helminthology Entomology Morphology (incl. Pathomorphology Ultrastructure) Biochemistry Physiology (incl. Pathophysiology) Parasite-Host-Relationships (incl. Immunology Host Specificity) Life History Ecology Epidermiology Diagnosis Chemotherapy and Control of Parasitic Diseases

Current impact factor: 2.33

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 2.327
2012 Impact Factor 2.852
2011 Impact Factor 2.149
2010 Impact Factor 1.812
2009 Impact Factor 1.721
2008 Impact Factor 1.473
2007 Impact Factor 1.512
2006 Impact Factor 1.14
2005 Impact Factor 1.226
2004 Impact Factor 1.06
2003 Impact Factor 1
2002 Impact Factor 1.046
2001 Impact Factor 1.025
2000 Impact Factor 1.025

Impact factor over time

Impact factor

Additional details

5-year impact 2.51
Cited half-life 4.80
Immediacy index 0.53
Eigenfactor 0.02
Article influence 0.46
Website Parasitology Research website
Other titles Parasitology research (Online), Parasitol res
ISSN 1432-1955
OCLC 43498348
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Springer Verlag

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  • Classification
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Publications in this journal

  • Daniela Antolová, Martina Miterpáková, Zuzana Paraličová
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    ABSTRACT: Dirofilaria repens, parasite of subcutaneous tissues of dogs and other carnivores, represents high infection risk for animals and humans in Europe. In men, infection usually presents as nodule in subcutaneous tissues or, less often, the lesions are localised around the eyes. The work presents first confirmed clinical case of human D. repens infection connected with cutaneous larva migrans syndrome. In patient, the migration of the worm caused true signs of creeping eruption, elevated sinuous track under the skin. It was connected with severe pain, burning and erythema of adjacent skin. Symptoms appeared at least three times, approximately once a month, always in the evening or night and lasted from several minutes to several days. In December 2014, during the scratching of residual pruritic lesion, patient removed 6-cm long, whitish worm from the wound. Morphological features (longitudinal ridges) and PCR amplification of cytochrome oxidase subunit 1 (CO1) confirmed Dirofilaria repens as etiological agent of infection. Herein, presented case confirmed that D. repens infection in humans can be associated with real creeping eruption, clinical sign of cutaneous larva migrans and should be included in its differential diagnosis.
    Parasitology Research 05/2015; DOI:10.1007/s00436-015-4499-7
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    ABSTRACT: This paper studied the species diversity and fauna distribution of chigger mites on small mammals in Yunnan province, southwest Yunnan. In total, 120,138 individuals of chigger mites were collected from 13,760 individual small mammals, and these mites were identified as comprising two families, 26 genera, and 274 species. Of the five zoogeographical subregions, the mite species diversity in subregions I and II was higher than that in subregions III, IV, and V. Four mite species (Leptotrombidium scutellare, Leptotrombidium sinicum, Leptotrombidium deliense, and Helenicula simena) were the most dominant species in the whole province. Several vector species of chigger mites co-existed in Yunnan, and L. deliense (a main vector of scrub typhus in China) was mainly distributed in subregions IV and V with lower latitude and average altitude whereas L. scutellare (also a main vector in China) was mainly distributed in subregions I, II, and III with higher latitude and average altitude. Some geographically widely distributed mite species were also the mites with wide host ranges and low host specificity. The dominant mite species and their clustering tendency in the dendrogram of hierarchical clustering analysis were highly in accordance with the zoogeographical divisions. The species diversity of chigger mites showed a parabolic tendency from the low altitude (<500 m) to the high altitude (>3,500 m) along the vertical gradients and reached the highest value in the middle altitude regions in 2,000-2,500 m. The highest species diversity of the mites and their small mammal hosts happened in the regions around the Hengduan Mountains, which is a hotspot of biodiversity in Asia continent. The host and its sample size, geographical scope, landscape, topography, and some other factors comprehensively influence the species diversity and faunal distribution of chigger mites. A systematic field investigation with a wide geographical scope and large host sample is strongly recommended in the fauna study of chigger mites and other ectoparasites.
    Parasitology Research 05/2015; DOI:10.1007/s00436-015-4483-2
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    ABSTRACT: The ubiquitination and deubiquitination of proteins can alter diverse cellular processes, such as proteolysis, trafficking, subcellular localisation, DNA repair, apoptosis and signal transduction. Deubiquitinating enzymes (DUBs) are responsible for removing ubiquitin from their target proteins. Previous reports have shown the presence of two subfamilies of DUBs in Schistosoma mansoni: Ub carboxyl-terminal hydrolase (UCH) and Ub-specific protease (USP). In this study, we analysed the ovarian tumour (OTU) and Machado-Joseph disease protein domain (MJD) proteases found in the Schistosoma mansoni genome database. An in silico analysis identified two different MJD subfamily members, SmAtaxin-3 and SmJosephin, and five distinct OTU proteases, SmOTU1, SmOTU3, SmOTU5a, SmOTU6b and SmOtubain. The phylogenetic analysis showed the evolutionary conservation of these proteins. Furthermore, the 3D structures confirmed the similarity of these proteins with human proteins. In addition, we performed quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and observed distinct expression profiles for all of the investigated transcripts between the cercariae, schistosomula and adult worm stages. Taken together, our data suggest that MJD and OTU subfamily members contribute to regulating the activity of the Ub-proteasome system during the life cycle of this parasite.
    Parasitology Research 05/2015; DOI:10.1007/s00436-015-4484-1
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    ABSTRACT: 1,8-Cineole found in many essential oils is a monoterpene and acts as a repellent against Sarcoptes scabiei var. cuniculi. In the present study, the acaricidal activity of 1,8-cineole against S. scabiei var. cuniculi was evaluated and the acaricidal mechanism was also investigated by assaying enzyme activities. The results showed that the lethal concentration of 50 % (LC50) value (95 % confidence limit (CL)) and the lethal time of 50 % (LT50) value (95 % CL) of 1,8-cineole were 2.77 mg/mL and 3.606 h, respectively. The pathological changes under transmission electron microscopy showed that the morphology of the mitochondria was abnormal, the cell nuclear membrane was damaged, and the nuclear chromatin was dissoluted. The activities of superoxide dismutase (SOD), glutathione-s-transferases (GSTs), monoamine oxidase (MAO), nitric oxide synthase (NOS), and acetylcholinesterase (AChE) were significantly changed after treatment with 1,8-cineole for 4, 8, 12, and 24 h. SOD and GSTs are associated with the protection mechanism of scabies mites. And, the activities of SOD and GSTs were increased as compared with the control group. MAO, AChE, and NOS are associated with the nervous system of scabies mites. The activity of MAO was increased whereas the AChE was suppressed. The activity of NOS was suppressed in the high-dose group whereas increased in the middle-dose group and low-dose group. These results indicated that the mechanism of 1,8-cineole mainly attributed to the changes of these enzyme activities related to the nervous system of scabies mites.
    Parasitology Research 05/2015; DOI:10.1007/s00436-015-4498-8
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    ABSTRACT: This study was designed to evaluate ImmunoCard STAT Cryptosporidium/Giardia rapid assay and ELISA copro-antigen assays in detecting Giardia lamblia and Cryptosporidium species in fecal samples in comparison to microscopy. Both ImmunoCard STAT and ELISA assays were evaluated with 90 stool specimens that were tested by the standard ova and parasite examination including staining with both iron hematoxylin stain and modified Ziehl Neelson stains. Counting the number of Giardia cysts and Cryptosporidia oocysts in the positive stool samples was done in order to quantify the lower limit of parasite number that was able to be detected by all included assays. Both ImmunoCard STAT and ELISA assays were compared on the basis of the attributes which are number of detected cases, sensitivity, specificity, time required for the procedure and screening, ease of performance and interpretation, and cost. Microscopic examination revealed that 13.3 % of the samples were positive for Giardia and 2.2 % for Cryptosporidium. By ELISA, 16.7 % of the samples were infected with Giardia and 3.3 % with Cryptosporidium, while by ImmunoCard STAT, 17.8 and 4.45 % of the samples were positive for Giardia and Cryptosporidium, respectively. There is no statistically significant difference between the results of ELISA and ImmunoCard STAT assays. The lowest concentration detected in the stool samples was 10.50 ± 1.05 Giardia cysts and 2.83 ± 1.72 Cryptosporidium oocysts. The ImmunoCard STAT was extremely easy to read, thus requiring much less time, but its cost was much higher than ELISA. We concluded that although the overall ranking of both assays was high, the ImmunoCard STAT rapid assay was a more desirable test despite its higher cost.
    Parasitology Research 05/2015; DOI:10.1007/s00436-015-4486-z
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    ABSTRACT: Juvenile Pseudosuccinea columella, measuring 1 or 2 mm in height, were subjected to single-miracidium infections with Fasciola hepatica to determine the developmental pattern of redial generations and count free and live rediae according to their generation. Controls were constituted of juvenile Galba truncatula infected according to the same protocol. In the four groups, redial counts were performed in snails dissected every week from day 7 to day 49 post-exposure at 20 °C. Most infected snails showed a normal development of redial generations, whatever the lymnaeid species. In P. columella, the total number of live rediae on day 49 was 24.6 and 34.6 per infected snail in the 1 and 2-mm groups, respectively (instead of 11.5 and 18.8 rediae in the corresponding groups of G. truncatula). A single mother redia (R1a) producing only daughter rediae of the second generation was noted in each snail of three groups, while the 2-mm P. columella showed the presence of a single (43 snails/71) or two (28/71) R1a redia(e) within their bodies. The mean number of other mother rediae and that of daughter rediae of the second generation were low in the 1 and 2-mm groups of both lymnaeids. Besides, there was a delay in redial development. The development of two live R1a rediae in several P. columella from the 2-mm group needs to verify if this process would be specific to P. columella or would occur in other lymnaeid species known for their good susceptibility to the digenean and their larger size to allow harbouring rediae.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4485-0
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    ABSTRACT: Captive management practices have the potential to drastically alter pre-existing host-parasite relationships. This can have profound implications for the health and productivity of threatened species in captivity, even in the absence of clinical symptoms of disease. Maximising the success of captive breeding programmes requires a detailed knowledge of anthropogenic influences on the structure of parasite assemblages in captive systems. In this study, we employed two high-throughput molecular techniques to characterise the parasitic nematode (suborder Strongylida) communities of the red kangaroo, Macropus rufus, across seven captive sites. The first was terminal restriction fragment length polymorphism (T-RFLP) analysis of a region of rDNA encompassing the internal transcribed spacers 1 (ITS1), the 5.8S rRNA gene and the internal transcribed spacer 2 (ITS2). The second was Illumina MiSeq next-generation sequencing of the ITS2 region. The prevalence, intensity of infection, taxonomic composition and comparative structure of strongylid nematode assemblages was assessed at each location. Prevalence (P = <0.001) and mean infection intensity (df = 6, F = 17.494, P = <0.001) differed significantly between the seven captive sites. Significant levels of parasite community structure were observed (ANOSIM, P = 0.01), with most of the variation being distributed within, rather than between, captive sites. The range of nematode taxa that occurred in captive red kangaroos appeared to differ from that of wild conspecifics, with representatives of the genus Cloacina, a dominant nematode parasite of the macropodid forestomach, being detected at only two of the seven study sites. This study also provides the first evidence for the presence of the genus Trichostrongylus in a macropodid marsupial. Our results demonstrate that contemporary species management practices may exert a profound influence on the structure of parasite communities in captive systems.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4494-z
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    ABSTRACT: Between March 2012 and April 2014, we performed post-mortem parasitological examinations of 11 Eurasian beavers (Castor fiber Linnaeus, 1758) from the basins of four main rivers (Dyje, Labe, Morava, Vltava) in the Czech Republic. The cause of death of five adult animals was unknown, three adult animals died after being hit by cars, while one young and one adult as a result of serious injuries and one juvenile male drowned. The trematode Stichorchis subtriquetrus (Rudolphi, 1814) Lühe, 1909 was only found in the caecum body and caecum apex of nine beavers (82 %), with no significant differences in parasite intensity among beavers. The highest number of trematodes (271) occurred in an adult female in July 2013; while a range of 1-57 individuals were found in other positive beavers. S. subtriquetrus size in both parts of the caecum was 11.0-17.0 × 5.5-8.0 mm (mean 14.3 × 6.9 mm). Results demonstrated that for the optimal detection of eggs, it was necessary to examine at least 10 g of faeces with a new modified method of sedimentation. The size range of 30 eggs was 157.1-182.5 × 99.3-109.8 μm (mean 168.0 × 104.4 μm). There were no differences in prevalence and seasonal occurrence of S. subtriquetrus between male and female beavers. We did not find any other intestinal endoparasites or tissue parasites (Sarcocystis spp., Trichinella spp.).
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4495-y
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    ABSTRACT: This study used a murine model of Chagas disease to investigate the isolated and combined impact of Trypanosoma cruzi infection and benznidazole (BZ) therapy on liver structure and function. Male C57BL/6 mice were challenged with T. cruzi and BZ for 15 days. Serum levels of cytokines and hepatic enzymes, liver oxidative stress, morphology, collagen, and glycogen content were monitored. Separately, T. cruzi infection and BZ treatment resulted in a pro-oxidant status and hepatic reactive damage. Concurrently, both T. cruzi infection and BZ treatment induced upregulation of antioxidant enzymes and pathological reorganization of the liver parenchyma and stroma. T. cruzi infection increased serum levels of Th1 cytokines, which were reduced by BZ in both infected and non-infected animals. BZ also induced functional organ damage, increasing serum levels of liver enzymes. When combined, T. cruzi infection and BZ therapy elicited intense hepatic reactive damage that was not compensated by antioxidant enzymatic reaction, subsequently culminating in more severe morphofunctional hepatic injury. Taken together, these findings indicate that during specific treatment of Chagas disease, hepatic pathology may be a result of an interaction between BZ metabolism and specific mechanisms activated during the natural course of T. cruzi infection, rather than an isolated toxic effect of BZ on liver structure and function.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4488-x
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    ABSTRACT: A placebo-controlled study was used to investigate the effectiveness of ivermectin to treat hookworm (Uncinaria sanguinis) and lice (Antarctophthirus microchir) infections in free-ranging Australian sea lion (Neophoca cinerea) pups and to test the hypotheses that these parasitic infections cause anaemia, systemic inflammatory responses, and reduced growth, and contribute towards decreased pup survival. Ivermectin was identified as an effective and safe anthelmintic in this species. Pups administered ivermectin had significantly higher erythrocyte counts and significantly lower eosinophil counts compared to controls at 1-2 months post-treatment, confirming that U. sanguinis and/or A. microchir are causatively associated with disease and demonstrating the positive effect of ivermectin treatment on clinical health parameters. Higher growth rates were not seen in ivermectin-treated pups and, unexpectedly, relatively older pups treated with ivermectin demonstrated significantly reduced growth rates when compared to matched saline-control pups. Differences in survival were not identified between treatment groups; however, this was attributed to the unexpectedly low mortality rate of recruited pups, likely due to the unintended recruitment bias towards pups >1-2 months of age for which mortality due to hookworm infection is less likely. This finding highlights the logistical and practical challenges associated with treating pups of this species shortly after birth at a remote colony. This study informs the assessment of the use of anthelmintics as a tool for the conservation management of free-ranging wildlife and outlines essential steps to further the development of strategies to ensure the effective conservation of the Australian sea lion and its parasitic fauna.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4481-4
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    ABSTRACT: The healing process occurs due to the interaction of cellular, molecular, and biochemical events. Regarding lesions difficult to heal, especially in immunocompromised patients, monitoring and intervention to promote healing is a constant focus of research. Another aggravating factor is the increase in the number of reported cases of microbial resistance, indicating that various dressings and drugs have been increasingly inefficient. Larval therapy (LT) involves the application of sterile fly larvae on chronic and/or infected wounds, and it is an area emerging as an alternative therapy. Before the 1940s, the LT was widely used, but fell into disuse after the appearance of antibiotics. High cost and the development of resistance by certain groups of pathogenic bacteria to these drugs encouraged the resurgence of LT, currently used in approximately 20 countries and more recently in Brazil. However, many mechanisms of action of the larvae in this system remain poorly understood. Thus, the aim of the study was to investigate histopathological findings and to evaluate possible mechanisms of action of dipteran larvae during tissue repair. Lesions were induced in 24 male Wistar rats, to evaluate the effect of the type of treatment applied. The animals were divided into four groups: larval therapy (LT), LT associated with foam dressing with silver release (LTSIL), mechanical debridement and silver foam dressing (DEBSIL), and no treatment (CONT). Skin samples were collected for histopathological analysis. In LT, inflammatory response and angiogenesis were abundant; in LTSIL, inflammatory response with neutrophil infiltration was observed; in DEBSIL, scarce inflammatory response, small numbers of macrophages and lymphocytes, and bacterial colonization in depth; and in CONT, there was bacterial colonization in deeper tissues. The observed histological events show that the larvae had an important role in promoting the inflammatory response in the wound bed, drawing the essential immune cells for tissue reconstruction, and contributing to the inhibition of bacterial growth. However, more studies on the larval-host interactions are required for increasing the application of LT in the hospital routine.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4487-y
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    ABSTRACT: Dactylogyrus formosus Kulwiec, 1927 (Monogenea: Dactylogyridae), widely distributed across Eurasia, is considered as one of the most frequently encountered ectoparasites of goldfish (Carassius auratus). In the present study, D. formosus on gills of cultured goldfish was reported in central China for the first time, using the methods of morphological characters and molecular markers. It was characterized by "Anchoratoid-Wegeneri" type anchor with elongate inner and unobvious outer root. The morphology of the opisthaptoral hard parts of D. formosus superficially resembles species of D. arcuatus Yamaguti, 1942 parasitized crucian carp, using light and scanning electron microscopy. However, the anchor total length of D. arcuatus (range 90-102) is almost double the size of D. formosus (range 43.7-57.1) which allows for their rapid discrimination from each other; on the other hand, the two species also can be easily separated by the shape of the male copulatory organ. The morphological description of D. formosus is supplemented with phylogenetic analysis of a reference DNA sequence spanning 18S rDNA and ITS1. What is more, this study also redescribes comprehensively D. formosus, providing for the first time a full ten point-to-point morphometric measurements of the hard parts, and importantly, a photographic record of the armature of the haptor and the male copulatory organ.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4474-3
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    ABSTRACT: The Vasa gene is a vital germline marker to study the origin and development of germ cells and gonads in many organisms. Until now, little information was available about the characteristics of the Vasa gene in Schistosoma japonicum (S. japonicum). In this study, we cloned the open reading frame (ORF) of the S. japonicum Vasa-like gene (Sj-Vasa). The expression pattern and tissue localization of Sj-Vasa were also analyzed. Our results showed that Sj-Vasa shared the general feature of DEAD-box family member proteins. Sj-Vasa was transcribed and expressed throughout the S. japonicum life cycle with transcription exhibiting high levels at day 24 in both male and female worms, and the expression level in the female was always higher than that in the male. Sj-Vasa protein was localized in a variety of tissues of adult schistosomes, including the gonads (ovary, vitellarium, and testes), the subtegument, and some cells of the parenchyma. To our knowledge, this is the first report of preliminary characterization and expression of the Vasa-like gene that may play an important role in the development of the worm, especially in reproductive organs of S. japonicum.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4473-4
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    ABSTRACT: In the present study, near-complete mitochondrial (mt) genome sequences for Schistosoma japonicum from different regions in the Philippines and Japan were amplified and sequenced. Comparisons among S. japonicum from the Philippines, Japan, and China revealed a geographically based length difference in mt genomes, but the mt genomic organization and gene arrangement were the same. Sequence differences among samples from the Philippines and all samples from the three endemic areas were 0.57-2.12 and 0.76-3.85 %, respectively. The most variable part of the mt genome was the non-coding region. In the coding portion of the genome, protein-coding genes varied more than rRNA genes and tRNAs. The near-complete mt genome sequences for Philippine specimens were identical in length (14,091 bp) which was 4 bp longer than those of S. japonicum samples from Japan and China. This indel provides a unique genetic marker for S. japonicum samples from the Philippines. Phylogenetic analyses based on the concatenated amino acids of 12 protein-coding genes showed that samples of S. japonicum clustered according to their geographical origins. The identified mitochondrial indel marker will be useful for tracing the source of S. japonicum infection in humans and animals in Southeast Asia.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4475-2
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    ABSTRACT: More than 40 kinds of mammals in China are known to be naturally infected with Schistosoma japonicum (S. japonicum) (Peng et al. Parasitol Res 106:967-76, 2010). Compared with permissive BALB/c mice, rats are less susceptible to S. japonicum infection and are considered to provide an unsuitable microenvironment for parasite growth and development. MicroRNAs (miRNAs), via the regulation of gene expression at the transcriptional and post-transcriptional levels, may be responsible for developmental differences between schistosomula in these two rodent hosts. Solexa deep-sequencing technology was used to identify differentially expressed miRNAs from schistosomula isolated from Wistar rats and BALB/c mice 10 days post-infection. The deep-sequencing analysis revealed that nearly 40 % of raw reads (10.37 and 10.84 million reads in schistosomula isolated from Wistar rats and BALB/c mice, respectively) can be mapped to selected mirs in miRBase or in species-specific genomes. Further analysis revealed that several miRNAs were differentially expressed in schistosomula isolated from these two rodents; 18 were downregulated (by <2-fold) and 23 were up-regulated (>2-fold) (expression levels in rats compare with those in mice). Additionally, three novel miRNAs were primarily predicted and identified. Among the 41 differentially expressed miRNAs, 4 miRNAs had been identified with specific functions in schistosome development or host-parasite interaction, such as sexual maturation (sja-miR-1, sja-miR-7-5p), embryo development (sja-miR-36-3p) in schistosome, and pathogenesis of schistosomiasis (sja-bantam). Then, the target genes were mapped, filtered, and correlated with a set of genes that were differentially expressed genes in schistosomula isolated from mice and rats, which we identified in a S. japonicum oligonucleotide microarray analysis in a previous study. Gene Ontology (GO) analysis of the predicted target genes of 13 differentially expressed miRNAs revealed that they were involved in some important biological pathways, such as metabolic processes, the regulation of protein catabolic processes, catalytic activity, oxidoreductase activity, and hydrolase activity. The study presented here includes the first identification of differentially expressed miRNAs between schistosomula in mice or rats. Therefore, we hypothesized that the differentially expressed miRNAs may affect the development, growth, and maturation of the schistosome in its life cycle. Our analysis suggested that some differentially expressed miRNAs may impact the survival and development of the parasite within a host. This study increases our understanding of schistosome development and host-parasite interactions.
    Parasitology Research 04/2015; DOI:10.1007/s00436-015-4468-1