Description and prevalence of gregarines infecting the amphipod Gammarus pulex, in the Water of Leith, Scotland, UK
In this study, samples of G. pulex were collected in the Water of Leith river, Scotland, UK. Gregarines were identified using light and scanning electron microscopy as well as standard molecular techniques. We identified three septate eugregarine symbionts-Heliospora longissima, Cephaloidophora gammari, and the here newly characterized Cephaloidophora conus n. sp. (formerly Cephaloidophora sp.) associated with Gammarus pulex in the Water of Leith. Prevalences for identified gregarine species were calculated and seasonal dynamics of gregarine infections/colonization were analyzed. Prevalences were highest in autumn and spri...
Source: European Journal of Protistology - May 1, 2024 Category: Microbiology Authors: Kevin McKinley Anastasios D Tsaousis Sonja R ückert Source Type: research
Contractile vacuoles: a rapidly expanding (and occasionally diminishing?) understanding
Eur J Protistol. 2024 Mar 26;94:126078. doi: 10.1016/j.ejop.2024.126078. Online ahead of print.ABSTRACTOsmoregulation is the homeostatic mechanism essential for the survival of organisms in hypoosmotic and hyperosmotic conditions. In freshwater or soil dwelling protists this is frequently achieved through the action of an osmoregulatory organelle, the contractile vacuole. This endomembrane organelle responds to the osmotic challenges and compensates by collecting and expelling the excess water to maintain the cellular osmolarity. As compared with other endomembrane organelles, this organelle is underappreciated and under-s...
Source: European Journal of Protistology - April 30, 2024 Category: Microbiology Authors: Kiran J More Harpreet Kaur Alastair G B Simpson Frederick W Spiegel Joel B Dacks Source Type: research
The ecto-3'-nucleotidase activity of Acanthamoeba castellanii trophozoites increases their adhesion to host cells through the generation of extracellular adenosine
Eur J Protistol. 2024 Apr 26;94:126086. doi: 10.1016/j.ejop.2024.126086. Online ahead of print.ABSTRACTAcanthamoeba castellanii, a free-living amoeba, can be pathogenic to humans causing a corneal infection named Acanthamoeba keratitis (AK). The mannose-binding protein (MBP) is well established as the major factor related to Acanthamoeba pathogenesis. However, additional factors that participate in the adhesion process and protect trophozoites from cytolytic effects caused by host immune responses remain unknown. Ectonucleotidases, including 3'-nucleotidase/nuclease (3'-NT/NU), a bifunctional enzyme that was recently repor...
Source: European Journal of Protistology - April 30, 2024 Category: Microbiology Authors: Eduarda de Souza-Maciel Luiz Fernando Carvalho-Kelly Anita Leocadio Freitas-Mesquita Jos é Roberto Meyer-Fernandes Source Type: research
Contractile vacuoles: a rapidly expanding (and occasionally diminishing?) understanding
Eur J Protistol. 2024 Mar 26;94:126078. doi: 10.1016/j.ejop.2024.126078. Online ahead of print.ABSTRACTOsmoregulation is the homeostatic mechanism essential for the survival of organisms in hypoosmotic and hyperosmotic conditions. In freshwater or soil dwelling protists this is frequently achieved through the action of an osmoregulatory organelle, the contractile vacuole. This endomembrane organelle responds to the osmotic challenges and compensates by collecting and expelling the excess water to maintain the cellular osmolarity. As compared with other endomembrane organelles, this organelle is underappreciated and under-s...
Source: European Journal of Protistology - April 30, 2024 Category: Microbiology Authors: Kiran J More Harpreet Kaur Alastair G B Simpson Frederick W Spiegel Joel B Dacks Source Type: research
The ecto-3'-nucleotidase activity of Acanthamoeba castellanii trophozoites increases their adhesion to host cells through the generation of extracellular adenosine
Eur J Protistol. 2024 Apr 26;94:126086. doi: 10.1016/j.ejop.2024.126086. Online ahead of print.ABSTRACTAcanthamoeba castellanii, a free-living amoeba, can be pathogenic to humans causing a corneal infection named Acanthamoeba keratitis (AK). The mannose-binding protein (MBP) is well established as the major factor related to Acanthamoeba pathogenesis. However, additional factors that participate in the adhesion process and protect trophozoites from cytolytic effects caused by host immune responses remain unknown. Ectonucleotidases, including 3'-nucleotidase/nuclease (3'-NT/NU), a bifunctional enzyme that was recently repor...
Source: European Journal of Protistology - April 30, 2024 Category: Microbiology Authors: Eduarda de Souza-Maciel Luiz Fernando Carvalho-Kelly Anita Leocadio Freitas-Mesquita Jos é Roberto Meyer-Fernandes Source Type: research
Molecular phylogenetic analyses support the validity of Ceratiomyxa porioides (Amoebozoa, Eumycetozoa) at species level
Eur J Protistol. 2024 Apr 12;94:126083. doi: 10.1016/j.ejop.2024.126083. Online ahead of print.ABSTRACTThe frequently encountered macroscopic slime molds of the genus Ceratiomyxa have long been recognized by mycologists and protistologists for hundreds of years. These organisms are amoebozoan amoebae that live and grow inside and on the surface of decaying wood. When conditions are favorable, they form subaerial sporulating structures called fruiting bodies which take on a variety of forms. These forms are typically some arrangement of column and/or branches, but one is uniquely poroid, forming folds instead. Originally, t...
Source: European Journal of Protistology - April 19, 2024 Category: Microbiology Authors: Nicholas W Fry Robert E Jones Quentin Blandenier Alexander K Tice Alfredo L Porfirio-Sousa Felicity Kleitz-Singleton Tristan C Henderson Matthew W Brown Source Type: research
Molecular phylogenetic analyses support the validity of Ceratiomyxa porioides (Amoebozoa, Eumycetozoa) at species level
Eur J Protistol. 2024 Apr 12;94:126083. doi: 10.1016/j.ejop.2024.126083. Online ahead of print.ABSTRACTThe frequently encountered macroscopic slime molds of the genus Ceratiomyxa have long been recognized by mycologists and protistologists for hundreds of years. These organisms are amoebozoan amoebae that live and grow inside and on the surface of decaying wood. When conditions are favorable, they form subaerial sporulating structures called fruiting bodies which take on a variety of forms. These forms are typically some arrangement of column and/or branches, but one is uniquely poroid, forming folds instead. Originally, t...
Source: European Journal of Protistology - April 19, 2024 Category: Microbiology Authors: Nicholas W Fry Robert E Jones Quentin Blandenier Alexander K Tice Alfredo L Porfirio-Sousa Felicity Kleitz-Singleton Tristan C Henderson Matthew W Brown Source Type: research
Molecular phylogenetic analyses support the validity of Ceratiomyxa porioides (Amoebozoa, Eumycetozoa) at species level
Eur J Protistol. 2024 Apr 12;94:126083. doi: 10.1016/j.ejop.2024.126083. Online ahead of print.ABSTRACTThe frequently encountered macroscopic slime molds of the genus Ceratiomyxa have long been recognized by mycologists and protistologists for hundreds of years. These organisms are amoebozoan amoebae that live and grow inside and on the surface of decaying wood. When conditions are favorable, they form subaerial sporulating structures called fruiting bodies which take on a variety of forms. These forms are typically some arrangement of column and/or branches, but one is uniquely poroid, forming folds instead. Originally, t...
Source: European Journal of Protistology - April 19, 2024 Category: Microbiology Authors: Nicholas W Fry Robert E Jones Quentin Blandenier Alexander K Tice Alfredo L Porfirio-Sousa Felicity Kleitz-Singleton Tristan C Henderson Matthew W Brown Source Type: research
Molecular phylogenetic analyses support the validity of Ceratiomyxa porioides (Amoebozoa, Eumycetozoa) at species level
Eur J Protistol. 2024 Apr 12;94:126083. doi: 10.1016/j.ejop.2024.126083. Online ahead of print.ABSTRACTThe frequently encountered macroscopic slime molds of the genus Ceratiomyxa have long been recognized by mycologists and protistologists for hundreds of years. These organisms are amoebozoan amoebae that live and grow inside and on the surface of decaying wood. When conditions are favorable, they form subaerial sporulating structures called fruiting bodies which take on a variety of forms. These forms are typically some arrangement of column and/or branches, but one is uniquely poroid, forming folds instead. Originally, t...
Source: European Journal of Protistology - April 19, 2024 Category: Microbiology Authors: Nicholas W Fry Robert E Jones Quentin Blandenier Alexander K Tice Alfredo L Porfirio-Sousa Felicity Kleitz-Singleton Tristan C Henderson Matthew W Brown Source Type: research
Molecular phylogenetic analyses support the validity of Ceratiomyxa porioides (Amoebozoa, Eumycetozoa) at species level
Eur J Protistol. 2024 Apr 12;94:126083. doi: 10.1016/j.ejop.2024.126083. Online ahead of print.ABSTRACTThe frequently encountered macroscopic slime molds of the genus Ceratiomyxa have long been recognized by mycologists and protistologists for hundreds of years. These organisms are amoebozoan amoebae that live and grow inside and on the surface of decaying wood. When conditions are favorable, they form subaerial sporulating structures called fruiting bodies which take on a variety of forms. These forms are typically some arrangement of column and/or branches, but one is uniquely poroid, forming folds instead. Originally, t...
Source: European Journal of Protistology - April 19, 2024 Category: Microbiology Authors: Nicholas W Fry Robert E Jones Quentin Blandenier Alexander K Tice Alfredo L Porfirio-Sousa Felicity Kleitz-Singleton Tristan C Henderson Matthew W Brown Source Type: research
Molecular phylogenetic analyses support the validity of Ceratiomyxa porioides (Amoebozoa, Eumycetozoa) at species level
Eur J Protistol. 2024 Apr 12;94:126083. doi: 10.1016/j.ejop.2024.126083. Online ahead of print.ABSTRACTThe frequently encountered macroscopic slime molds of the genus Ceratiomyxa have long been recognized by mycologists and protistologists for hundreds of years. These organisms are amoebozoan amoebae that live and grow inside and on the surface of decaying wood. When conditions are favorable, they form subaerial sporulating structures called fruiting bodies which take on a variety of forms. These forms are typically some arrangement of column and/or branches, but one is uniquely poroid, forming folds instead. Originally, t...
Source: European Journal of Protistology - April 19, 2024 Category: Microbiology Authors: Nicholas W Fry Robert E Jones Quentin Blandenier Alexander K Tice Alfredo L Porfirio-Sousa Felicity Kleitz-Singleton Tristan C Henderson Matthew W Brown Source Type: research
Pacific marine gregarines (Apicomplexa) shed light on biogeographic speciation patterns and novel diversity among early apicomplexans
This study introduces Undularius glycerae n. gen., n. sp. and Lecudina kitase n. sp. (Hokkaido, Japan), as well as Difficilina fasoliformis n. sp. (California, USA). Occurrences of Lecudina cf. longissima and Lecudina cf. tuzetae (California, USA) are also reported. Phylogenetic analysis revealed a close relationship between L. pellucida, L. tuzetae, and L. kitase n. sp. Additionally, clustering among North Atlantic and Pacific L. tuzetae formed a species complex, likely influenced by biogeography.PMID:38636336 | DOI:10.1016/j.ejop.2024.126080 (Source: European Journal of Protistology)
Source: European Journal of Protistology - April 18, 2024 Category: Microbiology Authors: Eric Odle Siratee Riewluang Kentaro Ageishi Hiroshi Kajihara Kevin C Wakeman Source Type: research
Pacific marine gregarines (Apicomplexa) shed light on biogeographic speciation patterns and novel diversity among early apicomplexans
This study introduces Undularius glycerae n. gen., n. sp. and Lecudina kitase n. sp. (Hokkaido, Japan), as well as Difficilina fasoliformis n. sp. (California, USA). Occurrences of Lecudina cf. longissima and Lecudina cf. tuzetae (California, USA) are also reported. Phylogenetic analysis revealed a close relationship between L. pellucida, L. tuzetae, and L. kitase n. sp. Additionally, clustering among North Atlantic and Pacific L. tuzetae formed a species complex, likely influenced by biogeography.PMID:38636336 | DOI:10.1016/j.ejop.2024.126080 (Source: European Journal of Protistology)
Source: European Journal of Protistology - April 18, 2024 Category: Microbiology Authors: Eric Odle Siratee Riewluang Kentaro Ageishi Hiroshi Kajihara Kevin C Wakeman Source Type: research
An approach to evaluating seasonal responses to acute toxicity of antibiotic nitrofurazone on periphytic ciliated protist communities in marine environments
Eur J Protistol. 2024 Apr 8;94:126081. doi: 10.1016/j.ejop.2024.126081. Online ahead of print.ABSTRACTPeriphytic protists including ciliates are the primary components of microbial communities in which they play a vital role in the progression of food webs by moving resources from lower to higher trophic levels. However, the toxic effects of veterinary antibiotics on periphytic protists across four seasons are minimally understood. Therefore, in this study, a 1-year survey was conducted with the antibiotic nitrofurazone (NFZ) applied at concentrations of 0.0, 1.5, 3.0, 6.0, and 12.0 mg/L. Samples of protist communities wer...
Source: European Journal of Protistology - April 16, 2024 Category: Microbiology Authors: Awais Ali Ning Wang Qiaoling Wang Guangjian Xu Henglong Xu Source Type: research
An approach to evaluating seasonal responses to acute toxicity of antibiotic nitrofurazone on periphytic ciliated protist communities in marine environments
Eur J Protistol. 2024 Apr 8;94:126081. doi: 10.1016/j.ejop.2024.126081. Online ahead of print.ABSTRACTPeriphytic protists including ciliates are the primary components of microbial communities in which they play a vital role in the progression of food webs by moving resources from lower to higher trophic levels. However, the toxic effects of veterinary antibiotics on periphytic protists across four seasons are minimally understood. Therefore, in this study, a 1-year survey was conducted with the antibiotic nitrofurazone (NFZ) applied at concentrations of 0.0, 1.5, 3.0, 6.0, and 12.0 mg/L. Samples of protist communities wer...
Source: European Journal of Protistology - April 16, 2024 Category: Microbiology Authors: Awais Ali Ning Wang Qiaoling Wang Guangjian Xu Henglong Xu Source Type: research
