Results 11 to 20 of about 3,782 (173)

Complex effects of climatic variation on bumblebee queen fitness. [PDF]

J Anim Ecol
A dearth of data on the health of wild‐insect populations hinders efforts to fully grasp the extent of historical population declines or unravel the mechanisms driving these effects. We help fill this data deficit by testing how climatic variation affects health, reproduction, size and survival in bumblebees—important insect pollinators.
Archer CR, Schmid-Hempel P, Schmid-Hempel R, Wilfert L.   +3 more
europepmc   +2 more sources

Sunflower Pollen and Bumble Bee Health: Mechanisms, Modifiers and Trade-Offs. [PDF]

Ecol Evol
This review integrates mechanistic evidence and field foraging data to examine how Asteraceae pollen affects Crithidia bombi infection in bumble bees. While laboratory studies show strong antiparasitic effects, field exposure is often limited, revealing a mismatch between efficacy and ecological relevance.
Odemer R.
europepmc   +2 more sources

Pollen from multiple sunflower cultivars and species reduces a common bumblebee gut pathogen [PDF]

Royal Society Open Science, 2019
Pathogens are one of the factors driving pollinator declines. Diet can play an important role in mediating pollinator health and resistance to pathogens. Sunflower pollen (Helianthus annuus) dramatically reduced a gut pathogen (Crithidia bombi) of Bombus
George M. LoCascio, Luis Aguirre, Rebecca E. Irwin, Lynn S. Adler   +3 more
doaj   +1 more source

Trypanothione Synthesis in Crithidia Revisited [PDF]

Journal of Biological Chemistry, 2005
In Crithidia fasciculata the biosynthesis of trypanothione (N(1),N(8)-bis(glutathionyl)spermidine; reduced trypanothione), a redox mediator unique to and essential for pathogenic trypanosomatids, was assumed to be achieved by two distinct enzymes, glutathionylspermidine synthetase and trypanothione synthetase (TryS), and only the first one was ...
Marcelo, Comini, Ulrich, Menge, Josef, Wissing, Leopold, Flohé   +3 more
openaire   +2 more sources

No evidence of effects or interaction between the widely used herbicide, glyphosate, and a common parasite in bumble bees [PDF]

PeerJ, 2021
Background Glyphosate is the world’s most used pesticide and it is used without the mitigation measures that could reduce the exposure of pollinators to it. However, studies are starting to suggest negative impacts of this pesticide on bees, an essential
Edward A. Straw, Mark J.F. Brown
doaj   +2 more sources

Molecular Identification of Species Caused Cutaneous Leishmaniasis in South-ern Zone of Iran

Journal of Arthropod-Borne Diseases, 2018
Background: Leishmania major and Leishmania tropica are two main species causing cutaneous leishmaniasis (CL) in Iran. Recently, Crithidia spp. has also been reported in the wound of patients with CL.
Afshin Barazesh, Mohammad Hossein Motazedian, Moradali Fouladvand, Gholamreza Hatam, Saeed Tajbakhsh, Sepideh Ebrahimi, Danial Purkamal   +6 more
doaj   +1 more source

Co-detection and isolation of Leishmania and Crithidia among naturally infected Tatera indica (Rodentia: Muridae) in Fars province, southern Iran

Asian Pacific Journal of Tropical Biomedicine, 2018
Objective: To explore the co-detection of natural infection of Trypanosomatidae parasites such as Leishmania and Crithidia in reservoir hosts of leishmaniasis.
Mohsen Kalantari, Mohammad Hossein Motazedian, Qasem Asgari, Iraj Mohammadpour, Aboozar Soltani, Kourosh Azizi   +5 more
doaj   +1 more source

Crithidia mellificae infection in different mammalian species in Brazil

International Journal for Parasitology: Parasites and Wildlife, 2021
Crithidia mellificae, a monoxenous trypanosomatid considered restricted to insects, was recently reported to infect a bat. Herein, C. mellificae has been demonstrated to have a wider range of vertebrate hosts and distribution in Brazilian biomes than ...
Maria Augusta Dario, Cristiane Varella Lisboa, Marlon Vicente Silva, Heitor Miraglia Herrera, Fabiana Lopes Rocha, Marina Carvalho Furtado, Ricardo Moratelli, André Luiz Rodrigues Roque, Ana Maria Jansen   +8 more
doaj   +1 more source

New Epidemiological Feature of Cutaneous Leishmaniasis in an Endemic Focus in Golestan Province

مجله علمی دانشگاه علوم پزشکی کردستان, 2022
Background and Aim: Cutaneous leishmaniasis (CL) is an important health problem in Iran and one of the world ̛s neglected diseases which is caused by Leishmania spp. The aim of this study was to investigate the epidemiology of cutaneous leishmaniasis and
Yousef Moghaddam, Hajar Ziaei Hezarjaribi, Mahdi Fakhar, Abdol Sattar Pagheh, Reza Saberi, Eisa Nazar, Mitra Sharbatkhori, Hossein ghalehnoei   +7 more
doaj  

Três novas espécies de tripanosomatídeos de insetos isolados em Alfenas, Minas Gerais, Brasil Three new species of trypanosomatidae isolated in Alfenas, Minas Gerais, Brazil

Memorias do Instituto Oswaldo Cruz, 1989
Três novas espécies de tripanosomatídeos foram isoladas em Alfenas, MG, Brasil: Herpetomonas anglusteri sp. n., do intestino posterior de Liopygia ruficorins (Diptera: Sarcophagidae); Crithidia roitmani sp. e.e Crithidia de souzai sp.
João Evangelista Fiorini, Paulo Márcio de Faria e Silva, Maurílio José Soares, Reginaldo Peçanha Brazil   +3 more
doaj   +1 more source