scholarly journals Bacterial microbiota composition of a common ectoparasite of cavity‐breeding birds, the Hen Flea Ceratophyllus gallinae

Ibis ◽  
2020 ◽  
Vol 162 (3) ◽  
pp. 1088-1092 ◽  
Author(s):  
Tuomas Aivelo ◽  
Barbara Tschirren
Keyword(s):  
Breeding Birds ◽  
Microbiota Composition ◽  
Bacterial Microbiota ◽  
Ceratophyllus Gallinae

scholarly journals Synchronized shift of oral, faecal and urinary microbiotas in bats and natural infection dynamics during seasonal reproduction

2018 ◽  
Vol 5 (5) ◽  
pp. 180041 ◽  
Author(s):  
Muriel Dietrich ◽  
Teresa Kearney ◽  
Ernest C. J. Seamark ◽  
Janusz T. Paweska ◽  
Wanda Markotter
Keyword(s):  
Disease Ecology ◽  
High Throughput Sequencing ◽  
Natural Infection ◽  
Pathogen Transmission ◽  
Comparative Approach ◽  
Seasonal Reproduction ◽  
Rrna Gene ◽  
Microbiota Composition ◽  
Infection Dynamics ◽  
Bacterial Microbiota

Seasonal reproduction is a period of extreme physiological and behavioural changes, yet we know little about how it may affect host microbial communities (i.e. microbiota) and pathogen transmission. Here, we investigated shifts of the bacterial microbiota in saliva, urine and faeces during the seasonal reproduction of bats in South Africa, and test for an interaction in shedding patterns of both bacterial ( Leptospira ) and viral (adeno- and herpesviruses) agents. Based on a comparative approach in two cave-dwelling bat species and high-throughput sequencing of the 16S rRNA gene, we demonstrated a clear signature in microbiota changes over the reproduction season, consistent across the multiple body habitats investigated, and associated with the sex, age and reproductive condition of bats. We observed in parallel highly dynamic shedding patterns for both bacteria and viruses, but did not find a significant association between viral shedding and bacterial microbiota composition. Indeed, only Leptospira shedding was associated with alterations in both the diversity and composition of the urinary microbiota. These results illustrate how seasonal reproduction in bats substantially affects microbiota composition and infection dynamics, and have broad implications for the understanding of disease ecology in important reservoir hosts, such as bats.

scholarly journals HPV infection and bacterial microbiota in the semen from healthy men

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Heidi Tuominen ◽  
Jaana Rautava ◽  
Katja Kero ◽  
Stina Syrjänen ◽  
Maria Carmen Collado ◽  
...  
Keyword(s):  
Semen Quality ◽  
Hpv Infection ◽  
Female Reproductive Tract ◽  
Microbiota Composition ◽  
Healthy Men ◽  
Hpv Dna ◽  
Male Health ◽  
Bacterial Microbiota ◽  
Hpv Status ◽  
Α Diversity

Abstract Background Aberrant microbiota composition has been linked to disease development at numerous anatomical sites. Microbiota changes in reaction to viral infections, such as human papillomavirus (HPV), have been investigated almost exclusively in the female reproductive tract. However, HPV infection may also affect male health by reducing semen quality and fertility. The aim of this study was to investigate whether present HPV DNA is associated with detectable changes in semen bacterial microbiota composition and diversity. Methods This study relied on stored semen samples from 31 fertile healthy men who participated in the Finnish family HPV Study during the years 1998–2001. DNA was extracted from semen with PCR template preparation kit. HPV was genotyped using Luminex-based Multimetrix® assay. Microbiota was analyzed from the V3-V4 region of 16S rDNA gene following sequencing on an Illumina MiSeq platform. All statistical analyses were performed with Calypso software version 8.84. Results HPV DNA was detected in 19.4% (6/31) of the semen samples. HPV status in the semen did not impact the α-diversity estimations, as measured by Chao1 and Shannon indices, nor ß-diversity. Nevertheless, HPV-positive semen samples exhibited differences in the taxonomic composition of the bacterial microbiota including higher abundances of Moraxellaceae (p = 0.028), Streptococcus (p = 0.0058) and Peptostreptococcus (p = 0.012) compared to HPV-negative semen samples. Conclusion HPV infection is associated with altered bacterial microbiota composition in semen, and this might have in impact to male health in general. As of present, it is unclear whether these changes result from HPV infection or whether altered bacterial microbiota increases susceptibility to HPV infection. More research is needed on viral-bacterial interactions in the male reproductive system.

scholarly journals Oral Bacterial Microbiota in Digestive Cancer Patients: A Systematic Review

2021 ◽  
Vol 9 (12) ◽  
pp. 2585
Author(s):  
Elisa Reitano ◽  
Nicola de’Angelis ◽  
Paschalis Gavriilidis ◽  
Federica Gaiani ◽  
Riccardo Memeo ◽  
...  
Keyword(s):  
Systematic Review ◽  
Cancer Patients ◽  
Fusobacterium Nucleatum ◽  
Current Evidence ◽  
Liver Carcinoma ◽  
Oral Microbiota ◽  
Microbiota Composition ◽  
Digestive Cancer ◽  
Bacterial Microbiota ◽  
Digestive Cancers

The relation between the gut microbiota and human health is increasingly recognized. Recently, some evidence suggested that dysbiosis of the oral microbiota may be involved in the development of digestive cancers. A systematic review was conducted according to the PRISMA guidelines to investigate the association between the oral microbiota and digestive cancers. Several databases including Medline, Scopus, and Embase were searched by three independent reviewers, without date restriction. Over a total of 1654 records initially identified, 28 studies (2 prospective cohort studies and 26 case-controls) were selected. They investigated oral microbiota composition in patients with esophageal squamous cell carcinoma (n = 5), gastric cancer (n = 5), colorectal cancer (n = 9), liver carcinoma (n = 2), and pancreatic cancer (n = 7). In most of the studies, oral microbiota composition was found to be different between digestive cancer patients and controls. Particularly, oral microbiota dysbiosis and specific bacteria, such as Fusobacterium nucleatum and Porphyromonas gingivalis, appeared to be associated with colorectal cancers. Current evidence suggests that differences exist in oral microbiota composition between patients with and without digestive cancers. Further studies are required to investigate and validate oral–gut microbial transmission patterns and their role in digestive cancer carcinogenesis.

scholarly journals Bacterial microbiota similarity between predators and prey in a blue tit trophic network

2021 ◽  
Author(s):  
Hélène Dion-Phénix ◽  
Anne Charmantier ◽  
Christophe de Franceschi ◽  
Geneviève Bourret ◽  
Steven W. Kembel ◽  
...  
Keyword(s):  
Spatial Scales ◽  
Trophic Levels ◽  
Rrna Gene ◽  
Microbiota Composition ◽  
16S Rrna Gene Sequences ◽  
Blue Tit ◽  
Trophic Networks ◽  
Bacterial Microbiota ◽  
Trophic Network ◽  
Blue Tits

AbstractTrophic networks are composed of many organisms hosting microbiota that interact with their hosts and with each other. Yet, our knowledge of the factors driving variation in microbiota and their interactions in wild communities is limited. To investigate the relation among host microbiota across a trophic network, we studied the bacterial microbiota of two species of primary producers (downy and holm oaks), a primary consumer (caterpillars), and a secondary consumer (blue tits) at nine sites in Corsica. To quantify bacterial microbiota, we amplified 16S rRNA gene sequences in blue tit feces, caterpillars, and leaf samples. Our results showed that hosts from adjacent trophic levels had a more similar bacterial microbiota than hosts separated by two trophic levels. Our results also revealed a difference between bacterial microbiota present on the two oak species, and among leaves from different sites. The main drivers of bacterial microbiota variation within each trophic level differed across spatial scales, and sharing the same tree or nest box increased similarity in bacterial microbiota for caterpillars and blue tits. This study quantifies host microbiota interactions across a three-level trophic network and illustrates how the factors shaping bacterial microbiota composition vary among different hosts.

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