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Article ; Online: Cyclospora cayetanensis Infection in Developed Countries

Leonor Chacin-Bonilla / Monica Santin

Microorganisms, Vol 11, Iss 540, p

Potential Endemic Foci?

2023 Volume 540

Abstract: Cyclospora cayetanensis infection has emerged as a significant public health concern worldwide. Developed countries are generally considered non-endemic for infection. However, sporadic cases and non-travel-related outbreaks of C. cayetanensis infections ...

Abstract	Cyclospora cayetanensis infection has emerged as a significant public health concern worldwide. Developed countries are generally considered non-endemic for infection. However, sporadic cases and non-travel-related outbreaks of C. cayetanensis infections associated with domestically grown produce are becoming more common in developed countries. Cyclospora cayetanensis has been detected in fresh produce, surface water, wastewater, irrigation water, and soil in these countries, suggesting that the parasite may be more common in areas with advanced sanitation than previously thought and illustrating the potential risk for exposure and indigenous/autochthonous infections. The evidence suggests the possibility of foci of endemicity in developed countries, particularly in communities where sanitary conditions are compromised, and raises transmission issues that require further research to better define the risks for infection, how widespread C. cayetanensis may be in these areas, and to guide interventions against this infection. The main purpose of the present opinion was to evaluate the presence of cyclosporiasis in developed countries, which is a very important and ongoing issue in food safety.
Keywords	Cyclospora cayetanensis ; cyclosporiasis ; developed countries ; endemic foci ; Biology (General) ; QH301-705.5
Subject code	333
Language	English
Publishing date	2023-02-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Mind the Gap

Jenny G. Maloney / Monica Santin

Microorganisms, Vol 9, Iss 997, p

New Full-Length Sequences of Blastocystis Subtypes Generated via Oxford Nanopore Minion Sequencing Allow for Comparisons between Full-Length and Partial Sequences of the Small Subunit of the Ribosomal RNA Gene

2021 Volume 997

Abstract: Blastocystis is a common food- and water-borne intestinal protist parasite of humans and many other animals. Blastocystis comprises multiple subtypes (STs) based on variability within the small subunit ribosomal ( SSU rRNA) RNA gene. Though full-length ... ...

Abstract	Blastocystis is a common food- and water-borne intestinal protist parasite of humans and many other animals. Blastocystis comprises multiple subtypes (STs) based on variability within the small subunit ribosomal ( SSU rRNA) RNA gene. Though full-length reference sequences of the SSU rRNA gene are a current requirement to name a novel Blastocystis subtype, full-length reference sequences are not currently available for all subtypes. In the present study, Oxford Nanopore MinION long-read sequencing was employed to generate full-length SSU rRNA sequences for seven new Blastocystis subtypes for which no full-length references currently exist: ST21, ST23, ST24, ST25, ST26, ST27, and ST28. Phylogenetic analyses and pairwise distance matrixes were used to compare full-length and partial sequences of the two regions that are most commonly used for subtyping. Analyses included Blastocystis nucleotide sequences obtained in this study (ST21 and ST23–ST28) and existing subtypes for which full-length reference sequences were available (ST1–ST17 and ST29). The relationships and sequence variance between new and existing subtypes observed in analyses of different portions of the SSU rRNA gene are discussed. The full-length SSU rRNA reference sequences generated in this study provide essential new data to study and understand the relationships between the genetic complexity of Blastocystis and its host specificity, pathogenicity, and epidemiology.
Keywords	Blastocystis ; long-read sequencing ; MinION ; ribosomal RNA ; subtypes ; Biology (General) ; QH301-705.5
Subject code	612
Language	English
Publishing date	2021-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Prevalence and associated risk factors of intestinal parasites among schoolchildren in Ecuador, with emphasis on the molecular diversity of Giardia duodenalis, Blastocystis sp. and Enterocytozoon bieneusi.

Estephany Tapia-Veloz / Mónica Gozalbo / Marisa Guillén / Alejandro Dashti / Begoña Bailo / Pamela C Köster / Mónica Santín / David Carmena / María Trelis

PLoS Neglected Tropical Diseases, Vol 17, Iss 5, p e

2023 Volume 0011339

Abstract: Background Intestinal helminths, including Soil-Transmitted Helminth (STH), and Gastrointestinal Protist (GP) infections are major contributors to the global burden of disease, particularly in low-income countries such Ecuador. Their epidemiology in ... ...

Abstract	Background Intestinal helminths, including Soil-Transmitted Helminth (STH), and Gastrointestinal Protist (GP) infections are major contributors to the global burden of disease, particularly in low-income countries such Ecuador. Their epidemiology in these settings is largely unknown. Methodology This prospective cross-sectional study investigates the carriage of intestinal helminths, including STH, and GP in asymptomatic schoolchildren (3-11 years) in the Chimborazo and Guayas provinces, Ecuador. Single stool samples (n = 372) and epidemiological questionnaires on demographics and potential risk factors were collected from participating schoolchildren. Conventional microscopy examination was used as screening method, and molecular (PCR and Sanger sequencing) assays were used to further investigate the epidemiology of some GP. A multivariate logistic regression analysis was used to evaluate the strength of the association of suspected risk factors with the presence of helminths and GP. Principal findings At least one intestinal parasite species was observed by microscopy in 63.2% (235/372) of the participating schoolchildren. Enterobius vermicularis (16.7%, 62/372; 95% CI: 13.0-20.9) and Blastocystis sp. (39.2%, 146/372; 95% CI: 34.2-44.2) were the most prevalent among helminths and GP, respectively. Assemblages A (50.0%), B (37.5%) and A+B (12.5%) were detected within Giardia duodenalis and ST3 (28.6%), ST1 and ST2 (26.2% each), and ST4 (14.3%) within Blastocystis sp. Three genotypes, two known (A: 66.7%; KB-1: 16.7%) and a novel (HhEcEb1, 16.7%) were identified within Enterocytozoon bieneusi. Municipality of origin, household overcrowding, and poor sanitation and personal hygiene habits were risk factors for childhood intestinal parasites colonization. Conclusions/significance Despite massive government drug administration programs, STH and GP infection remain a public health concern in paediatric populations living in poor-resource settings. Molecular analytical methods are required to better understand the ...
Keywords	Arctic medicine. Tropical medicine ; RC955-962 ; Public aspects of medicine ; RA1-1270
Subject code	610
Language	English
Publishing date	2023-05-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Wide Genetic Diversity of Blastocystis in White-Tailed Deer ( Odocoileus virginianus ) from Maryland, USA

Jenny G. Maloney / Yunah Jang / Aleksey Molokin / Nadja S. George / Monica Santin

Microorganisms, Vol 9, Iss 1343, p

2021 Volume 1343

Abstract: Blastocystis is a gastrointestinal protist frequently reported in humans and animals worldwide. Wildlife populations, including deer, may serve as reservoirs of parasitic diseases for both humans and domestic animals, either through direct contact or ... ...

Abstract	Blastocystis is a gastrointestinal protist frequently reported in humans and animals worldwide. Wildlife populations, including deer, may serve as reservoirs of parasitic diseases for both humans and domestic animals, either through direct contact or through contamination of food or water resources. However, no studies of the occurrence and subtype distribution of Blastocystis in wildlife populations have been conducted in the United States. PCR and next generation amplicon sequencing were used to determine the occurrence and subtypes of Blastocystis in white-tailed deer ( Odocoileus virginianus ). Blastocystis was common, with 88.8% (71/80) of samples found to be positive. Twelve subtypes were identified, ten previously reported (ST1, ST3, ST4, ST10, ST14, ST21, and ST23–ST26) and two novel subtypes (ST30 and ST31). To confirm the validity of ST30 and ST31, MinION sequencing was used to obtain full-length SSU rRNA gene sequences, and phylogenetic and pairwise distance analyses were performed. ST10, ST14, and ST24 were the most commonly observed subtypes. Potentially zoonotic subtypes ST1, ST3, or ST4 were present in 8.5% of Blastocystis -positives. Mixed subtype infections were common (90.1% of Blastocystis -positives). This study is the first to subtype Blastocystis in white-tailed deer. White-tailed deer were found to be commonly infected/colonized with a wide diversity of subtypes, including two novel subtypes, zoonotic subtypes, and subtypes frequently reported in domestic animals. More studies in wildlife are needed to better understand their role in the transmission of Blastocystis .
Keywords	Blastocystis ; MinION ; NGS ; ribosomal RNA ; subtypes ; white-tailed deer ; Biology (General) ; QH301-705.5
Subject code	590
Language	English
Publishing date	2021-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Co-Infection with Cryptosporidium meleagridis and Enterocytozoon bieneusi in an HIV+ Colombian Patient

Carolina Hernández-Castro / Larry L. Martínez-Rosado / Alejandro Dashti / Pamela C. Köster / Begoña Bailo / María C. Orozco / Mónica Santín / David González-Barrio / David Carmena

Parasitologia, Vol 3, Iss 6, Pp 48-

2023 Volume 52

Abstract: A 44-year-old human immunodeficiency virus-infected (HIV+) female with severe immunodeficiency Category 3 (C3) diagnosed in 2010 was admitted to hospital with acute diarrhoea. She was non-adherent to antiretroviral therapy (ART) and had a previous ... ...

Abstract	A 44-year-old human immunodeficiency virus-infected (HIV+) female with severe immunodeficiency Category 3 (C3) diagnosed in 2010 was admitted to hospital with acute diarrhoea. She was non-adherent to antiretroviral therapy (ART) and had a previous suspicion of respiratory symptoms with a cough that had been persisting for 15 days. Clinical examination revealed severe immune deterioration (viral load: 109,655 copies/mL; CD4+ count: 14 cells/mm3), respiratory symptoms (negative sputum Gram stain and tuberculosis culture), and neurological deterioration (serological assays negative for Cryptococcus spp. and Toxoplasma gondii ). A coproculture was negative for Campylobacter spp., Salmonella spp., and Shigella spp. Ziehl–Neelsen staining of faecal smears revealed the presence of Cryptosporidium spp. oocysts. PCR testing and sequencing confirmed a concomitant infection with C. meleagridis and Enterocytozoon bieneusi . The patient was treated with metronidazole (500 mg every 8 h for 5 days) and nitazoxanide (500 mg every 12 h for 14 days). After requesting voluntary discharge and abandoning ART and parasiticidal treatments, she experienced a dramatic deterioration of her state of health and contact with her was lost. Our results have demonstrated that molecular-based testing improves the detection of opportunistic pathogens that are difficult to detect by routine microscopy, allows for transmission dynamics investigations, and assists in choosing the best chemotherapeutical option.
Keywords	AIDS ; diarrhoea ; enteric pathogens ; molecular diagnosis ; opportunistic infections ; Infectious and parasitic diseases ; RC109-216 ; Biology (General) ; QH301-705.5
Subject code	616
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Cryptosporidium mortiferum n. sp. (Apicomplexa

Lenka Tůmová / Jana Ježková / Jitka Prediger / Nikola Holubová / Bohumil Sak / Roman Konečný / Dana Květoňová / Lenka Hlásková / Michael Rost / John McEvoy / Lihua Xiao / Monica Santín / Martin Kváč

Parasites & Vectors, Vol 16, Iss 1, Pp 1-

Cryptosporidiidae), the species causing lethal cryptosporidiosis in Eurasian red squirrels (Sciurus vulgaris)

2023 Volume 21

Abstract: Abstract Background Cryptosporidium spp. are globally distributed parasites that infect epithelial cells in the microvillus border of the gastrointestinal tract of all classes of vertebrates. Cryptosporidium chipmunk genotype I is a common parasite in ... ...

Abstract	Abstract Background Cryptosporidium spp. are globally distributed parasites that infect epithelial cells in the microvillus border of the gastrointestinal tract of all classes of vertebrates. Cryptosporidium chipmunk genotype I is a common parasite in North American tree squirrels. It was introduced into Europe with eastern gray squirrels and poses an infection risk to native European squirrel species, for which infection is fatal. In this study, the biology and genetic variability of different isolates of chipmunk genotype I were investigated. Methods The genetic diversity of Cryptosporidium chipmunk genotype I was analyzed by PCR/sequencing of the SSU rRNA, actin, HSP70, COWP, TRAP-C1 and gp60 genes. The biology of chipmunk genotype I, including oocyst size, localization of the life cycle stages and pathology, was examined by light and electron microscopy and histology. Infectivity to Eurasian red squirrels and eastern gray squirrels was verified experimentally. Results Phylogenic analyses at studied genes revealed that chipmunk genotype I is genetically distinct from other Cryptosporidium spp. No detectable infection occurred in chickens and guinea pigs experimentally inoculated with chipmunk genotype I, while in laboratory mice, ferrets, gerbils, Eurasian red squirrels and eastern gray squirrels, oocyst shedding began between 4 and 11 days post infection. While infection in mice, gerbils, ferrets and eastern gray squirrels was asymptomatic or had mild clinical signs, Eurasian red squirrels developed severe cryptosporidiosis that resulted in host death. The rapid onset of clinical signs characterized by severe diarrhea, apathy, loss of appetite and subsequent death of the individual may explain the sporadic occurrence of this Cryptosporidium in field studies and its concurrent spread in the population of native European squirrels. Oocysts obtained from a naturally infected human, the original inoculum, were 5.64 × 5.37 μm and did not differ in size from oocysts obtained from experimentally infected hosts. ...
Keywords	Mortality ; Biology ; Course of infection ; Cryptosporidiosis ; Oocyst size ; Phylogeny ; Infectious and parasitic diseases ; RC109-216
Subject code	572
Language	English
Publishing date	2023-07-01T00:00:00Z
Publisher	BMC
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Gut microbiota profiles in diarrheic patients with co-occurrence of Clostridioides difficile and Blastocystis.

Laura Vega / Giovanny Herrera / Marina Muñoz / Manuel A Patarroyo / Jenny G Maloney / Monica Santín / Juan David Ramírez

PLoS ONE, Vol 16, Iss 3, p e

2021 Volume 0248185

Abstract: Blastocystis and Clostridioides difficile co-occurrence is considered a rare event since the colonization by Blastocystis is prevented under a decrease in beneficial bacteria in the microbiota when there is C. difficile infection (CDI). This scenario has ...

Abstract	Blastocystis and Clostridioides difficile co-occurrence is considered a rare event since the colonization by Blastocystis is prevented under a decrease in beneficial bacteria in the microbiota when there is C. difficile infection (CDI). This scenario has been reported once, but no information on the gut microbiota profiling is available. The present study is motivated by knowing which members of the microbiota can be found in this rare scenario and how this co-occurrence may impact the abundance of other bacteria, eukaryotes or archaea present in the gut microbiota. This study aimed to describe the bacterial and eukaryotic communities using amplicon-based sequencing of the 16S- and 18S-rRNA regions of three patient groups: (1) Blastocystis and C. difficile infection (B+/C+, n = 31), (2) C. difficile infection only (B-/C+, n = 44), and (3) without Blastocystis or C. difficile (B-/C-, n = 40). Blastocystis was subtyped using amplicon-based sequencing of the 18S-rRNA gene, revealing circulation of subtypes ST1 (43.4%), ST3 (35.85%) and ST5 (20.75%) among the study population. We found that B+/C+ patients had a higher abundance of some beneficial bacteria (such as butyrate producers or bacteria with anti-inflammatory properties) compared with non-Blastocystis-colonized patients, which may suggest a shift towards an increase in beneficial bacteria when Blastocystis colonizes patients with CDI. Regarding eukaryotic communities, statistical differences in the abundance of some eukaryotic genera between the study groups were not observed. Thus, this study provides preliminary descriptive information of a potential microbiota profiling of differential presence by Blastocystis and C. difficile.
Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Investigation of neglected protists Blastocystis sp. and Dientamoeba fragilis in immunocompetent and immunodeficient diarrheal patients using both conventional and molecular methods.

Fakhriddin Sarzhanov / Funda Dogruman-Al / Monica Santin / Jenny G Maloney / Ayse Semra Gureser / Djursun Karasartova / Aysegul Taylan-Ozkan

PLoS Neglected Tropical Diseases, Vol 15, Iss 10, p e

2021 Volume 0009779

Abstract: Introduction The clinical significance of Blastocystis sp. and Dientamoeba fragilis in patients with gastrointestinal symptoms is a controversial issue. Since the pathogenicity of these protists has not been fully elucidated, testing for these organisms ... ...

Abstract	Introduction The clinical significance of Blastocystis sp. and Dientamoeba fragilis in patients with gastrointestinal symptoms is a controversial issue. Since the pathogenicity of these protists has not been fully elucidated, testing for these organisms is not routinely pursued by most laboratories and clinicians. Thus, the prevalence of these organisms and the subtypes of Blastocystis sp. in human patients in Turkey are not well characterized. This study aimed to determine the prevalence of Blastocystis sp. and D. fragilis in the diarrheic stool samples of immunodeficient and immunocompetent patients using conventional and molecular methods and to identify Blastocystis sp. subtypes using next generation sequencing. Material and methods Individual stool specimens were collected from 245 immunodeficient and 193 immunocompetent diarrheic patients between March 2017 and December 2019 at the Gazi University Training and Research Hospital in Ankara, Turkey. Samples were screened for Blastocystis sp. and D. fragilis by conventional and molecular methods. Molecular detection of both protists was achieved by separate qPCRs targeting a partial fragment of the SSU rRNA gene. Next generation sequencing was used to identify Blastocystis sp. subtypes. Results The prevalence of Blastocystis sp. and D. fragilis was 16.7% and 11.9%, respectively as measured by qPCR. The prevalence of Blastocystis sp. and D. fragilis was lower in immunodeficient patients (12.7% and 10.6%, respectively) compared to immunocompetent patients (21.8% and 13.5%, respectively). Five Blastocystis sp. subtypes were identified and the following subtype distribution was observed: ST3 54.4% (n = 37), ST2 16.2% (n = 11), ST1 4.4% (n = 3), ST6 2.9% (n = 2), ST4 1.5% (n = 1), ST2/ST3 11.8% (n = 8) and ST1/ST3 8.8% (n = 6). There was no statistically significant difference in the distribution of Blastocystis sp. subtypes between immunocompetent and immunodeficient patients. Conclusion and recommendation Our findings demonstrated that Blastocystis sp. and D. ...
Keywords	Arctic medicine. Tropical medicine ; RC955-962 ; Public aspects of medicine ; RA1-1270
Subject code	616
Language	English
Publishing date	2021-10-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Zoonotic and genetically diverse subtypes of Blastocystis in US pre-weaned dairy heifer calves

Maloney, Jenny G / Jason E. Lombard / Natalie J. Urie / Chelsey B. Shivley / Monica Santin

Parasitology research. 2019 Feb., v. 118, no. 2

2019

Abstract: Blastocystis is an emerging zoonotic pathogen with global distribution. However, limited data exist on the prevalence and genetic diversity of Blastocystis in the USA and in food animals. We conducted the first large-scale molecular investigation of ... ...

Abstract	Blastocystis is an emerging zoonotic pathogen with global distribution. However, limited data exist on the prevalence and genetic diversity of Blastocystis in the USA and in food animals. We conducted the first large-scale molecular investigation of Blastocystis in the USA by testing 2539 fecal samples from dairy heifer calves from 13 states. Blastocystis was detected in 73 (2.9%) fecal samples and in 10 of the 13 tested states. Molecular characterization showed a wide diversity of subtypes. Eleven subtypes were identified, seven previously reported (ST-3, ST-4, ST-5, ST-10, ST-14, ST-17, and ST-21) and four potentially novel subtypes (named ST-23 to ST-26). Zoonotic subtypes 3, 4, and 5 were found in 67% (49) of the positive specimens in this population. Our results suggest that cattle could serve as reservoirs of infection for humans and other domestic animals highlighting the potential risk of zoonotic transmission for Blastocystis.
Keywords	Blastocystis ; calves ; feces ; food animals ; genetic variation ; geographical distribution ; humans ; pathogens ; risk ; United States
Language	English
Dates of publication	2019-02
Size	p. 575-582.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	284966-5
ISSN	1432-1955 ; 0932-0113 ; 0044-3255
ISSN (online)	1432-1955
ISSN	0932-0113 ; 0044-3255
DOI	10.1007/s00436-018-6149-3
Database	NAL-Catalogue (AGRICOLA)

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Article: Oxidative state of the frugivorous bat Sturnira lilium (Chiroptera: Phyllostomidae) in agricultural and urban areas of southern Brazil

Oliveira, Fernanda Weinmann / Schindler, Monica Santin Zanatta / Corá, Denyelle Hennayra / Thiel, Nathana / Siebel, Anna Maria / Galiano, Daniel

Environmental science and pollution research international. 2020 Aug., v. 27, no. 24

2020

Abstract: Exposure to contaminants is one of the main threats to all living organisms. In this context, bats have been used to indicate environmental contaminants in urban and agricultural environments, since they are extremely sensitive to changes in the ... ...

Abstract	Exposure to contaminants is one of the main threats to all living organisms. In this context, bats have been used to indicate environmental contaminants in urban and agricultural environments, since they are extremely sensitive to changes in the ecosystem and easily accumulate waste in their body tissues. Among bats, Sturnira lilium, is a frugivorous species widely distributed and abundant in Brazil that uses an extensive variety of habitats and shelters. In this study, we aimed to evaluate the oxidative state of S. lilium individuals in agricultural and urban areas in southern Brazil. Individuals were sampled in agricultural and urban areas from November 2017 to March 2018 through the mist-net method. Parameters of the superoxide dismutase (SOD) and catalase (CAT) enzyme activity, non-protein thiols (NPSH), and lipid peroxidation (TBARS) were determined based on liver tissue. A total of 46 individuals were captured, 29 of them in urban areas and 17 in agricultural areas. We found that S. lilium individuals from agricultural areas showed a significant increase in TBARS, NPSH, and SOD activity, compared to individuals from urban areas. The activity of the antioxidant enzyme CAT did not differ. The present findings suggest that the species S. lilium, which are widely distributed and abundant in Brazil in urban and agricultural areas, can usefully be employed in biomonitoring programs. Further studies are to be encouraged to refine our knowledge on the potential DNA damage caused by environmental contamination, as well as identify potential contaminants to bats.
Keywords	DNA damage ; Phyllostomidae ; antioxidant enzymes ; catalase ; ecosystems ; environmental monitoring ; enzyme activity ; frugivores ; lipid peroxidation ; liver ; pollution ; research ; superoxide dismutase ; thiols ; wastes ; Brazil
Language	English
Dates of publication	2020-08
Size	p. 30868-30874.
Publishing place	Springer Berlin Heidelberg
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-020-09552-z
Database	NAL-Catalogue (AGRICOLA)

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