Advertisement

Topics

Host age, sex, and reproductive seasonality affect nematode parasitism in wild Japanese macaques.

Summary of "Host age, sex, and reproductive seasonality affect nematode parasitism in wild Japanese macaques."

Parasites are characteristically aggregated within hosts, but identifying the mechanisms underlying such aggregation can be difficult in wildlife populations. We examined the influence of host age and sex over an annual cycle on the eggs per gram of feces (EPG) of nematode parasites infecting wild Japanese macaques (Macaca fuscata yakui) on Yakushima Island. Five species of nematode were recorded from 434 fecal samples collected from an age-structured group of 50 individually recognizable macaques. All parasites exhibited aggregated EPG distributions. The age-infection profiles of all three directly transmitted species (Oesophagostomum aculeatum, Strongyloides fuelleborni, and Trichuris trichiura) exhibited convex curves, but concavity better characterized the age-infection curves of the two trophically transmitted species (Streptopharagus pigmentatus and Gongylonema pulchrum). There was a male bias in EPG and prevalence of infection with directly transmitted species, except in the prevalence of O. aculeatum, and no sex bias in the other parasites. Infection with O. aculeatum showed a female bias in prevalence among young adults, and additional interactions with sex and seasonality show higher EPG values in males during the mating season (fall) but in females during the birth season (spring). These patterns suggest that an immunosuppressive role by reproductive hormones may be regulating direct, but not indirect, life-cycle parasites. Exposure at an early age may trigger an immune response that affects all nematodes, but trophically transmitted species appear to accumulate thereafter. Although it is difficult to discern clear mechanistic explanations for parasite distributions in wildlife populations, it is critical to begin examining these patterns in host species that are increasingly endangered by anthropogenic threats.

Affiliation

Section of Social Systems Evolution, Department of Ecology and Social Behavior, Kyoto University Primate Research Institute, 41-2 Kanrin, Inuyama, Aichi, 484-8506, Japan, macintosh@pri.kyoto-u.ac.jp.

Journal Details

This article was published in the following journal.

Name: Primates; journal of primatology
ISSN: 1610-7365
Pages:

Links

DeepDyve research library

PubMed Articles [13037 Associated PubMed Articles listed on BioPortfolio]

The Gut Microbiota of Wild Mice.

The gut microbiota profoundly affects the biology of its host. The composition of the microbiota is dynamic and is affected by both host genetic and many environmental effects. The gut microbiota of l...

A generalist brood parasite modifies use of a host in response to reproductive success.

Avian obligate brood parasites, which rely solely on hosts to raise their young, should choose the highest quality hosts to maximize reproductive output. Brown-headed cowbirds (Molothrus ater) are ext...

Bacteria Endosymbiont, Wolbachia, Promotes Parasitism of Parasitoid Wasp Asobara japonica.

Wolbachia is the most widespread endosymbiotic bacterium that manipulates reproduction of its arthropod hosts to enhance its own spread throughout host populations. Infection with Wolbachia causes com...

RNA-Seq Based Identification of Candidate Parasitism Genes of Cereal Cyst Nematode (Heterodera avenae) during Incompatible Infection to Aegilops variabilis.

One of the reasons for the progressive yield decline observed in cereals production is the rapid build-up of populations of the cereal cyst nematode (CCN, Heterodera avenae). These nematodes secrete s...

Investigating the Role of the Host Multidrug Resistance Associated Protein Transporter Family in Burkholderia cepacia Complex Pathogenicity Using a Caenorhabditis elegans Infection Model.

This study investigated the relationship between host efflux system of the non-vertebrate nematode Caenorhabditis elegans and Burkholderia cepacia complex (Bcc) strain virulence. This is the first com...

Clinical Trials [2327 Associated Clinical Trials listed on BioPortfolio]

A Study Of PF-05212384 Plus Irinotecan Vs Cetuximab Plus Irinotecan In Patients With KRAS And NRAS Wild Type Metastatic Colorectal Cancer

This study will investigate whether the combination of PF-05212384 plus Irinotecan improves progression free survival in patients with KRAS and NRAS wild type metastatic colorectal cancer ...

Assisted Reproductive Technology Survey (ART Survey)

The purpose of the study is to collate local information to better understand the motivations, accessibility and frequency of assisted reproductive technology (ART) use in the community.

Wild-Type Reovirus, Bortezomib, and Dexamethasone in Treating Patients With Relapsed or Refractory Multiple Myeloma

This phase Ib trial studies the safety and best dose of wild-type reovirus in combination with bortezomib and dexamethasone and to see how well they work in treating patients with multiple...

Preconception Reproductive Knowledge Promotion (PREKNOP)

This study examines the efficacy of the "Preconception Reproductive Knowledge Promotion (PREKNOP)" intervention, designed to promote women's reproductive health and positive pregnancy outc...

Wild Type p53 Adenovirus for Oral Premalignancies

Primary Objectives: 1. To determine the maximum tolerated dose and transduction efficiency of adenoviral mediated wild type p53 gene transfer in premalignancies of the upper aerodi...

Medical and Biotech [MESH] Definitions

A species of FLAVIVIRUS, one of the Japanese encephalitis virus group (ENCEPHALITIS VIRUSES, JAPANESE), found in Australia and New Guinea. It causes a fulminating viremia resembling Japanese encephalitis (ENCEPHALITIS, JAPANESE).

A species of FLAVIVIRUS, one of the Japanese encephalitis virus group (ENCEPHALITIS VIRUSES, JAPANESE), which is the etiological agent of Japanese encephalitis found in Asia, southeast Asia, and the Indian subcontinent.

A genus of parasitic nematodes found in the peritoneal cavity of wild or domestic cattle or equines.

A genus of parasitic nematode worms which infest the duodenum and stomach of domestic and wild herbivores, which ingest it with the grasses (POACEAE) they eat. Infestation of man is accidental.

Vaccines or candidate vaccines used to prevent infection with Japanese B encephalitis virus (ENCEPHALITIS VIRUS, JAPANESE).

Quick Search
Advertisement
 


DeepDyve research library

Relevant Topic

Infectious-diseases
Antiretroviral Therapy Clostridium Difficile Ebola HIV & AIDS Infectious Diseases Influenza Malaria Measles Sepsis Swine Flu Tropical Medicine Tuberculosis Infectious diseases are caused by pathogenic...


Searches Linking to this Article