Patterns of host and flea communities along an elevational gradient in Colorado

Canadian Journal of Zoology, Volume 0, Issue 0, Page 433-442, e-First articles. Patterns in community composition across a landscape are the result of mechanistic responses and species interactions. Interactions between hosts and parasites have additional complexity because of the contingency of host presence and interactions among parasites. To assess the role of environmental changes within host and parasite communities, we surveyed small mammals and their fleas over a dynamic elevational gradient in the Front Range in Colorado, USA. Communities were characterized using several richness and diversity metrics and these were compared using a suite of frequentist and randomization approaches. We found that flea species richness was related to the number of host species based upon rarefaction, but no patterns in richness with elevation were evident. Values of diversity measures increased with elevation, representing that small-mammal and flea communities were more even upslope, yet turnover in composition was not related to examined variables. The results suggest there are strong local effects that drive these small-mammal and flea communities, although the breadth of flea species is tied to host availability.
Source: Canadian Journal of Zoology - Category: Zoology Tags: article Source Type: research

Related Links:

CONCLUSION: Our results confirmed the frequent association of depression with psoriasis and atopic dermatitis, indicating the need for the early detection and treatment of such comorbid patients. In contrast, psychiatric inpatients do not appear to suffer from predominantly infectious-parasitic dermatoses. PMID: 32093459 [PubMed]
Source: Psychiatry Investigation - Category: Psychiatry Tags: Psychiatry Investig Source Type: research
Mizoram, a northeastern state in India, shares international borders with Myanmar and Bangladesh and is considered to be one of the key routes through which drug-resistant parasites of Southeast Asia enter mai...
Source: Malaria Journal - Category: Infectious Diseases Authors: Tags: Research Source Type: research
Human blood cells (erythrocytes) serve as hosts for the malaria parasite Plasmodium falciparum during its 48-h intraerythrocytic developmental cycle (IDC). Established in vitro protocols allow for the study of ho...
Source: Malaria Journal - Category: Infectious Diseases Authors: Tags: Research Source Type: research
by Paul Kelly, Fatemeh Hadi-Nezhad, Dennis Y. Liu, Travis J. Lawrence, Roger G. Linington, Michael Ibba, David H. Ardell The development of chemotherapies against eukaryotic pathogens is especially challenging because of both the evolutionary conservation of drug targets between host and parasite, and the evolution of strain-dependent drug resistance. There is a strong need for new nontoxic drugs with broad-spectrum activity against trypanosome parasites such asLeishmania andTrypanosoma. A relatively untested approach is to target macromolecular interactions in parasites rather than small molecular interactions, under the...
Source: PLoS Neglected Tropical Diseases - Category: Tropical Medicine Authors: Source Type: research
The infection dynamics between different species of Plasmodium that infect the same human host can both suppress and exacerbate disease. This could arise from inter-parasite interactions, such as competition, from immune regulation, or both. The occurrence of protective, cross-species (heterologous) immunity is an unlikely event, especially considering that strain-transcending immunity within a species is only partial despite lifelong exposure to that species. Here we review the literature in humans and animal models to identify the contexts where heterologous immunity can arise, and which antigens may be involved. From th...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
This study supports the idea that aporphine alkaloids from A. purpurea, mainly (+)-(R)-glaziovine (4), could contribute to the development of new formulations for the treatment of amoebiasis. In addition, X-ray diffraction structural analysis and complete 1H and 13C NMR assignments of (+)-(R)-glaziovine (4) were performed and reported for the first time. [...] Georg Thieme Verlag KG Stuttgart · New YorkArticle in Thieme eJournals: Table of contents  |  Abstract  |  Full text
Source: Planta Medica - Category: Drugs & Pharmacology Authors: Tags: Original Papers Source Type: research
Trypanosoma cruzi is a protozoan parasite that infects at least 7 million persons in the world (OMS, 2019). In endemic areas, infection normally occurs by vectorial transmission; however, outside, it normally happens by blood and includes congenital transmission. The persistence of T. cruzi during infection suggests the presence of immune evasion mechanisms and the modulation of the anti-parasite response to a profile incapable of eradicating the parasite. Dendritic cells (DCs) are a heterogeneous population of antigen-presenting cells (APCs) that patrol tissues with a key role in mediating the interface between the innate...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
Few genetic tools were available to work with Trypanosoma cruzi until the recent introduction of the CRISPR/Cas9 technique for gene knockout, gene knock-in, gene complementation, and endogenous gene tagging. Riboswitches are naturally occurring self-cleaving RNAs (ribozymes) that can be ligand-activated. Results from our laboratory recently demonstrated the usefulness of the glmS ribozyme from Bacillus subtilis, which has been shown to control reporter gene expression in response to exogenous glucosamine, for gene silencing in Trypanosoma brucei. In this work we used the CRISPR/Cas9 system for endogenously tagging T. cruzi...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
ConclusionsAlthough uncommon, these urological infections are associated with significant morbidity and mortality and awareness in all healthcare settings is now an essential requirement.
Source: World Journal of Urology - Category: Urology & Nephrology Source Type: research
This study evaluated the haematological profile of adult individuals infected with the malaria parasite. Methods: A retrospective study was conducted using archived data of malaria positive cases from January 2017 to March 15, 2019. Data retrieved included subjects' demographics, malaria parasite count, malaria parasite species, and full blood count parameters. A total of 236 malaria positive subjects were included in the study. Results: The study showed that more females were infected with the malaria parasite than males (69.07% and 30.93%, respectively). A total of 87.3% of the study population were infected with...
Source: Advances in Hematology - Category: Hematology Tags: Adv Hematol Source Type: research
More News: Environmental Health | Parasitic Diseases | Parasitology | Zoology