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https://www.readbyqxmd.com/read/28740461/down-for-the-count-cryptosporidium-infection-depletes-the-gut-microbiome-in-coquerel-s-sifakas
#1
Erin A McKenney, Lydia K Greene, Christine M Drea, Anne D Yoder
Background: The gut microbiome (GMB) is the first line of defense against enteric pathogens, which are a leading cause of disease and mortality worldwide. One such pathogen, the protozoan Cryptosporidium, causes a variety of digestive disorders that can be devastating and even lethal. The Coquerel's sifaka (Propithecus coquereli) - an endangered, folivorous primate endemic to Madagascar - is precariously susceptible to cryptosporidiosis under captive conditions. If left untreated, infection can rapidly advance to morbidity and death...
2017: Microbial Ecology in Health and Disease
https://www.readbyqxmd.com/read/28730516/cryptosporidium-infection-in-children-with-cancer-undergoing-chemotherapy-how-important-is-the-prevention-of-opportunistic-parasitic-infections-in-patients-with-malignancies
#2
Reza Berahmat, Mahmoud Mahami-Oskouei, Azim Rezamand, Adel Spotin, Nayyereh Aminisani, Roghayeh Ghoyounchi, Solmaz Madadi
Cryptosporidiosis is a relatively uncommon disease in healthy individuals but could be potentially worrisome in immunocompromised patients. This study aimed to evaluate Cryptosporidium infection in children with cancer undergoing chemotherapy. A case-control study was conducted in 132 children with cancer undergoing chemotherapy and 132 non-cancer controls. The modified Ziehl-Neelsen (MZN) staining and polymerase chain reaction methods were used for the detection of Cryptosporidium parasite. All positive isolates were sequenced for phylogenetic analysis...
July 20, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28722573/killing-of-cryptosporidium-sporozoites-by-lactoferrin
#3
Jose Luis Paredes, Hayley Sparks, A Clinton White, Griselle Martinez-Traverso, Theresa Ochoa, Alejandro Castellanos-González
Intestinal infection caused by Cryptosporidium is a major contributor to diarrhea morbidity and mortality in young children around the world. Current treatments for children suffering from cryptosporidiosis are suboptimal. Lactoferrin is a glycoprotein found in breast milk. It has showed bacteriostatic and antimicrobial activity in the intestine. However, the effects of lactoferrin on the intestinal parasite Cryptosporidium have not been reported. In this study, we investigated the anticryptosporidial activity of human lactoferrin on different stages of Cryptosporidium...
July 3, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719263/burden-of-disease-attributed-to-waterborne-transmission-of-selected-enteric-pathogens-australia-2010
#4
Katherine B Gibney, Joanne O'Toole, Martha Sinclair, Karin Leder
AbstractUniversal access to safe drinking water is a global priority. To estimate the annual disease burden of campylobacteriosis, nontyphoidal salmonellosis, cryptosporidiosis, giardiasis, and norovirus attributable to waterborne transmission in Australia, we multiplied regional World Health Organization (WHO) estimates of the proportion of cases attributable to waterborne transmission by estimates of all-source disease burden for each study pathogen. Norovirus was attributed as causing the most waterborne disease cases (479,632; 95% uncertainty interval [UI]: 0-1,111,874) followed by giardiasis and campylobacteriosis...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28704362/local-and-global-genetic-diversity-of-protozoan-parasites-spatial-distribution-of-cryptosporidium-and-giardia-genotypes
#5
Juan C Garcia-R, Nigel French, Anthony Pita, Niluka Velathanthiri, Rima Shrestha, David Hayman
Cryptosporidiosis and giardiasis are recognized as significant enteric diseases due to their long-term health effects in humans and their economic impact in agriculture and medical care. Molecular analysis is essential to identify species and genotypes causing these infectious diseases and provides a potential tool for monitoring. This study uses information on species and genetic variants to gain insights into the geographical distribution and spatial patterns of Cryptosporidium and Giardia parasites. Here, we describe the population heterogeneity of genotypic groups within Cryptosporidium and Giardia present in New Zealand using gp60 and gdh markers to compare the observed variation with other countries around the globe...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28702138/prevalence-and-clinical-features-of-cryptosporidium-infection-in-hemodialysis-patients
#6
Mohammad Ali Mohaghegh, Seyed Hossein Hejazi, Mohsen Ghomashlooyan, Hamed Kalani, Farzaneh Mirzaei, Mehdi Azami
AIM: This cross-sectional study aims to assess the prevalence of Cryptosporidium in hemodialysis patients compared with healthy individuals in central Iran from August 2014 to January 2015. BACKGROUND: Cryptosporidiosis is a major cause of acute and persistent diarrhea with significant morbidity and mortality in immunocompromised patients such as those undergoing renal dialysis. METHODS: Three stool samples were collected from 330 hemodialysis patients and 150 healthy individuals on 3 consecutive days...
2017: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/28682770/the-prevalence-of-cyclospora-cayetanensis-and-cryptosporidium-spp-in-turkish-patients-infected-with-hiv-1
#7
Hayriye Kirkoyun Uysal, Gokhan Tolga Adas, Kevser Atalik, Semih Altiparmak, Ozer Akgul, Suat Saribas, Mert Gurcan, Pelin Yuksel, Taner Yildirmak, Bekir Kocazeybek, Tevhide Ziver, Yasar Ali Oner
Opportunistic infections such as cryptosporidiosis and cyclosporiasis are commonly encountered in patients with acquired immunodeficiency syndrome (AIDS). We investigated the existence of opportunistic protozoans that significantly affect the quality of life in HIV-1 infected patients using conventional and molecular methods. The study group comprised 115 HIV-1 positive patients. In the identification of Cyclospora cayetanensis and Cryptosporidium, the formol-ether precipitation method was used and smears were evaluated in optical microscope by staining modified Ziehl-Neelsen (ZN)...
September 26, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28668658/evaluation-of-enzyme-linked-immunosorbent-assay-for-stool-antigen-detection-for-the-diagnosis-of-cryptosporidiosis-among-hiv-negative-immunocompromised-patients-in-a-tertiary-care-hospital-of-northern-india
#8
Ujjala Ghoshal, Vidhi Jain, Asmita Dey, Prabhat Ranjan
The diagnosis of cryptosporidiosis among HIV positive patients has been the focus of many studies worldwide. However, there is a paucity of data on HIV negative immunocompromised patients like post-renal transplant recipients and those with haematological malignancies. Stool microscopy, the conventional method of diagnosis, is fraught with difficulties like cumbersome sample processing and subjective interpretation. Enzyme linked immunosorbent assay (ELISA), on the other hand, is quicker and easier. The present study was conducted in a tertiary care and super speciality hospital of north India...
June 28, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28658417/evaluation-of-recombinant-cryptosporidium-hominis-gp60-protein-and-anti-gp60-chicken-polyclonal-igy-for-research-and-diagnostic-purposes
#9
Valéria Chamas Miura, Sérgio Moraes Aoki, Paulo Peitl, Lilian Campos Pires, Priscila Dalmagro, Alex Akira Nakamura, Marcelo Vasconcelos Meireles
In this study, a method for expressing Cryptosporidium hominis GP60 glycoprotein in Escherichia coli for production of polyclonal anti-GP60 IgY in chickens was developed aiming future studies concerning the diagnosis, prevention and treatment of cryptosporidiosis. The full-length nucleotide sequence of the C. hominis gp60 gene was codon-optimized for expression in E. coli and was synthesized in pET28-a vector. Subcloning was performed on several different strains of BL21 E. coli. Temperature, time and inducer IPTG concentration assays were also performed and analyzed using SDS-PAGE...
June 22, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28654242/global-cryptosporidium-loads-from-livestock-manure
#10
Lucie Vermeulen, Jorien Benders, GertJan Medema, Nynke Hofstra
Understanding the environmental pathways of Cryptosporidium is essential for effective management of human and animal cryptosporidiosis. In this paper we aim to quantify livestock Cryptosporidium spp. loads to land on a global scale using spatially explicit process-based modelling, and to explore the effect of manure storage and treatment on oocyst loads using scenario analysis. Our model GloWPa-Crypto L1 calculates a total global Cryptosporidium spp. load from livestock manure of 3.2x10(23) oocysts per year...
June 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28651534/a-survey-for-potentially-zoonotic-gastrointestinal-parasites-in-domestic-cavies-in-cameroon-central-africa
#11
Felix Meutchieye, Marc K Kouam, Emile Miegoué, Terence T Nguafack, Joseph Tchoumboué, Alexis Téguia, Georgios Théodoropoulos
BACKGROUND: Farm animals are usually suspected to transmit infections to humans. Domestic cavies (Cavia porcellus) are hosts to a variety of pathogens, some of which are zoonotic. Several parasites including the protozoa Giardia spp. and Cryptosporidium spp. may be causative agents of gastrointestinal disorders in domestic cavies and humans. The aim of the study was to investigate the occurrence of potentially zoonotic protozoa as well as any potential zoonotic gastrointestinal parasite in domestic cavies raised under a semi extensive system in the rural areas of Cameroon...
June 26, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28650734/clostridium-difficile-associated-colitis-post-transplant-is-not-associated-with-elevation-of-tacrolimus-concentrations
#12
Hugo J R Bonatti, Karim W Sadik, Elizabeth Krebs, Costi D Sifri, Timothy L Pruett, Robert G Sawyer
BACKGROUND: Diarrhea is a common condition after solid organ transplant (SOT); Clostridium difficile-associated colitis (CDAC) is one of the most common infections after SOT. We documented previously that some types of enteritis are associated with an elevation of tacrolimus (TAC) trough concentrations by interfering with the drug's complex metabolism. PATIENTS AND METHODS: Tacrolimus concentrations of 25 SOT recipients including 12 renal and 13 liver recipients before, during, and after CDAC were analyzed retrospectively...
June 26, 2017: Surgical Infections
https://www.readbyqxmd.com/read/28650648/indian-ocean-dipole-and-cryptosporidiosis-in-australia-short-term-and-nonlinear-associations
#13
Aparna Lal, Masahiro Hashizume, Simon Hales
The Indian Ocean Dipole (IOD) is a global climate phenomenon that influences the spread of human infectious diseases through climate extremes including droughts and floods. The Dipole Mode Index (DMI), which measures the strength of the IOD, is one of the main indicators of rainfall variability across Australia. Using an ecological, time-series approach we examined the short-term and nonlinear relationship between the DMI and weekly cryptosporidiosis reported from 2001 to 2012 across the temperate, subtropical, and tropical climate zones in Australia, controlling for season, long-term trends, and cryptosporidiosis counts from the past week...
June 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28634204/papers-of-note-in-nature546-7658
#14
Annalisa M VanHook
This week's articles highlight a compound that may be useful for treating cryptosporidiosis and a kinase complex that links cell division to cellular metabolism.
June 20, 2017: Science Signaling
https://www.readbyqxmd.com/read/28634143/pcr-based-verification-of-positive-rapid-diagnostic-tests-for-intestinal-protozoa-infections-with-variable-test-band-intensity
#15
Sören L Becker, Ivan Müller, Pascal Mertens, Mathias Herrmann, Leyli Zondie, Lindsey Beyleveld, Markus Gerber, Rosa du Randt, Uwe Pühse, Cheryl Walter, Jürg Utzinger
Stool-based rapid diagnostic tests (RDTs) for pathogenic intestinal protozoa (e.g. Cryptosporidium spp. and Giardia intestinalis) allow for prompt diagnosis and treatment in resource-constrained settings. Such RDTs can improve individual patient management and facilitate population-based screening programmes in areas without microbiological laboratories for confirmatory testing. However, RDTs are difficult to interpret in case of 'trace' results with faint test band intensities and little is known about whether such ambiguous results might indicate 'true' infections...
June 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28625824/polymorphism-study-of-cryptosporidium-hominis-gp60-subtypes-circulating-in-tunisia
#16
Rym Essid, Hanen Chelbi, Emna Siala, Ines Bensghair, Jean Menotti, Aïda Bouratbine
Cryptosporidium spp. are a major cause of gastrointestinal diseases in humans worldwide. While a single subtype of Cryptosporidium hominis has been shown to be responsible for several large outbreaks related to water contamination in developed countries, little is known about the epidemiology of C. hominis in developing countries. This study reports the first genetic characterization of C. hominis at the subtype level in several human populations in Tunisia using the gp60 gene. Eighteen isolates were identified as C...
June 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28617836/molecular-diversity-and-frequency-of-the-diarrheagenic-enteric-protozoan-giardia-duodenalis-and-cryptosporidium-spp-in-a-hospital-setting-in-northern-spain
#17
José Manuel Azcona-Gutiérrez, Aida de Lucio, Marta Hernández-de-Mingo, Concepción García-García, Luis Miguel Soria-Blanco, Lucía Morales, María Aguilera, Isabel Fuentes, David Carmena
BACKGROUND: Human giardiosis and cryptosporidiosis are caused by the enteric protozoan parasites Giardia duodenalis and Cryptosporidium spp. Both pathogens are major contributors to the global burden of diarrhoeal disease, affecting primarily children and immunodebilitated individuals in resource-poor settings. Giardiosis and cryptosporidiosis also represent an important, often underestimate, public health threat in developed countries. In Spain only limited information is currently available on the epidemiology of these infections...
2017: PloS One
https://www.readbyqxmd.com/read/28599077/protective-efficacy-of-recombinant-cryptosporidium-parvum-cpprp1-sushi-domain-against-c-tyzzeri-infection-in-mice
#18
Y Huang, W Cao, K Shi, R Mi, K Lu, X Han, Z Chen
Until now there are no completely effective parasite-specific pharmaceuticals or immunotherapies for treatment against the zoonotic cryptosporidiosis. Sushi domain (CpSushi) is an important functional domain in Cryptosporidium parvum putative rhoptry protein-1 (CpPRP1) which is the only reported C. parvum rhoptry protein and may play key role in the course of invasion. Here, a 708 bp fragment encoding the CpSushi domain was amplified and expressed in E. coli. Immunofluorescence detection showed that CpSushi was located on the surface of C...
June 9, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28574022/multilocus-sequence-typing-of-cryptosporidium-hominis-from-northern-india
#19
Pooja Yadav, Bijay Ranjan Mirdha, Govind K Makharia, Rama Chaudhry
BACKGROUND & OBJECTIVES: Human cryptosporidiosis is endemic worldwide, and at least eight species have been reported in humans; the most common being Cryptosporidium hominis and C. parvum. Detailed understanding of the epidemiology of Cryptosporidium is increasingly facilitated using standardized universal technique for species differentiation and subtyping. In this study micro- and minisatellite targets in chromosome 6 were used to assess genetic diversity of C. hominis by sequence length polymorphisms along with single nucleotide polymorphisms (SNPs)...
January 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28562588/a-cryptosporidium-pi-4-k-inhibitor-is-a-drug-candidate-for-cryptosporidiosis
#20
Ujjini H Manjunatha, Sumiti Vinayak, Jennifer A Zambriski, Alexander T Chao, Tracy Sy, Christian G Noble, Ghislain M C Bonamy, Ravinder R Kondreddi, Bin Zou, Peter Gedeck, Carrie F Brooks, Gillian T Herbert, Adam Sateriale, Jayesh Tandel, Susan Noh, Suresh B Lakshminarayana, Siau H Lim, Laura B Goodman, Christophe Bodenreider, Gu Feng, Lijun Zhang, Francesca Blasco, Juergen Wagner, F Joel Leong, Boris Striepen, Thierry T Diagana
Diarrhoeal disease is responsible for 8.6% of global child mortality. Recent epidemiological studies found the protozoan parasite Cryptosporidium to be a leading cause of paediatric diarrhoea, with particularly grave impact on infants and immunocompromised individuals. There is neither a vaccine nor an effective treatment. Here we establish a drug discovery process built on scalable phenotypic assays and mouse models that take advantage of transgenic parasites. Screening a library of compounds with anti-parasitic activity, we identify pyrazolopyridines as inhibitors of Cryptosporidium parvum and Cryptosporidium hominis...
June 15, 2017: Nature
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