نتایج جستجو برای: parasite numbers

تعداد نتایج: 234509  

2016
M. Garvey G. Coughlan N. Murphy N. Rowan

The presence of pathogenic organisms namely parasite species and bacteria in biofilms in veterinary settings, is a public health concern in relation to human and animal exposure. Veterinary clinics represent a significant risk factor for the transfer of pathogens from housed animals to humans, especially in cases of wound infection and the shedding of faecal matter. This study aims to provide a...

Journal: :Cell reports 2013
Joshua M Horne-Debets Rebecca Faleiro Deshapriya S Karunarathne Xue Q Liu Katie E Lineburg Chek Meng Poh Gijsbert M Grotenbreg Geoffrey R Hill Kelli P A MacDonald Michael F Good Laurent Renia Rafi Ahmed Arlene H Sharpe Michelle N Wykes

Malaria is a highly prevalent disease caused by infection by Plasmodium spp., which infect hepatocytes and erythrocytes. Blood-stage infections cause devastating symptoms and can persist for years. Antibodies and CD4(+) T cells are thought to protect against blood-stage infections. However, there has been considerable difficulty in developing an efficacious malaria vaccine, highlighting our inc...

Journal: :Journal of theoretical biology 2002
Mike B Gravenor Alun L Lloyd Peter G Kremsner Michel A Missinou Mike English Kevin Marsh Dominic Kwiatkowski

We describe an age-structured mathematical model of the malaria parasite life cycle that uses clinical observations of peripheral parasitaemia to estimate population dynamics of sequestered parasites, which are hidden from the clinical investigator. First, the model was tested on parasite populations cultured in vitro, and was found to account for approximately 72% of the variation in that sub-...

Journal: :Clinical microbiology reviews 2002
Michael J Arrowood

The in vitro cultivation of protozoan parasites of the genus Cryptosporidium has advanced significantly in recent years. These obligate, intracellular parasites colonize the epithelium of the digestive and respiratory tracts, are often difficult to obtain in significant numbers, produce durable oocysts that defy conventional chemical disinfection methods, and are persistently infectious when st...

Journal: :Molecular Microbiology 2008
Andrea Ecker Ellen S C Bushell Rita Tewari Robert E Sinden

Transmission from the vertebrate host to the mosquito vector represents a major population bottleneck in the malaria life cycle that can successfully be targeted by intervention strategies. However, to date only about 25 parasite proteins expressed during this critical phase have been functionally analysed by gene disruption. We describe the first systematic, larger scale generation and phenoty...

Journal: :Bulletin of the Ecological Society of America 2023

We curated a dataset containing 5999 records of 361 freshwater fish species (~70% known in the country) and 483 endo- ectoparasitic helminths registered throughout Mexico over an 85-year period (from 1936 to 2021). Taxonomically, highest numbers host corresponded family Cichlidae, parasites trematode Diplostomidae. hope this will encourage researchers worldwide explore different ecological coev...

2015
Sandra K. Nilsson Lauren M. Childs Caroline Buckee Matthias Marti Chetan E. Chitnis

Malaria remains one of the leading causes of death worldwide, despite decades of public health efforts. The recent commitment by many endemic countries to eliminate malaria marks a shift away from programs aimed at controlling disease burden towards one that emphasizes reducing transmission of the most virulent human malaria parasite, Plasmodium falciparum. Gametocytes, the only developmental s...

Journal: :Journal of invertebrate pathology 2011
Árni Kristmundsson Sigurður Helgason Slavko Helgi Bambir Matthías Eydal Mark A Freeman

Examination of three scallop species from three separate locations: Iceland scallop from Icelandic waters, king scallop from Scottish waters and queen scallop from Faroese and Scottish waters, revealed infections of a previously unknown apicomplexan parasite in all three scallop species. Developmental forms observed in the shells appeared to include both sexual and asexual stages of the parasit...

Journal: :Infection and immunity 1996
D F Hoft P L Farrar K Kratz-Owens D Shaffer

Trypanosoma cruzi is an intracellular parasite transmitted from a reduviid insect vector to humans by exposure of mucosal surfaces to infected insect excreta. We have used an oral challenge murine model that mimics vector-borne transmission to study T. cruzi mucosal infection. Although gastric secretions have microbicidal activity against most infectious pathogens, we demonstrate that T. cruzi ...

Journal: :Parasitology 2008
M S Rocchi K T Ballingall D Ngugi N D MacHugh D J McKeever

Theileria parva is an intracellular protozoan parasite transmitted by ticks that causes a fatal lymphoproliferative disease of cattle known as East Coast Fever. Vaccination against the disease currently relies on inoculation of the infective sporozoite stage of the parasite and simultaneous treatment with long-acting formulations of oxytetracycline. Sporozoites are maintained as frozen stabilat...

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