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Prevalence and Genetic Diversity of Giardia duodenalis and Cryptosporidium spp. among School Children in a Rural Area of the Amhara Region, North-West Ethiopia

Identifieur interne : 000E66 ( Main/Exploration ); précédent : 000E65; suivant : 000E67

Prevalence and Genetic Diversity of Giardia duodenalis and Cryptosporidium spp. among School Children in a Rural Area of the Amhara Region, North-West Ethiopia

Auteurs : Aida De Lucio [Espagne] ; Aranzazu Amor-Aramendía [Espagne] ; Bego A Bailo [Espagne] ; José M. Saugar [Espagne] ; Melaku Anegagrie [Espagne] ; Ana Arroyo [Espagne] ; Beatriz L Pez-Quintana [Espagne] ; Derjew Zewdie [Éthiopie] ; Zimmam Ayehubizu [Éthiopie] ; Endalew Yizengaw [Éthiopie] ; Bayeh Abera [Éthiopie] ; Mulat Yimer [Éthiopie] ; Wondemagen Mulu [Éthiopie] ; Tadesse Hailu [Éthiopie] ; Zaida Herrador [Espagne] ; Isabel Fuentes [Espagne] ; David Carmena [Espagne]

Source :

RBID : PMC:4965151

Abstract

Backgroud

Giardia duodenalis and Cryptosporidium spp. are enteric protozoan causing gastrointestinal illness in humans and animals. Giardiasis and cryptosporidiosis are not formally considered as neglected tropical diseases, but belong to the group of poverty-related infectious diseases that impair the development and socio-economic potential of infected individuals in developing countries.

Methods

We report here the prevalence and genetic diversity of G. duodenalis and Cryptosporidium spp. in children attending rural primary schools in the Bahir Dar district of the Amhara Region, Ethiopia. Stool samples were collected from 393 children and analysed by molecular methods. G. duodenalis was detected by real-time PCR, and the assemblages and sub-assemblages were determined by multilocus sequence-based genotyping of the glutamate dehydrogenase and β-giardin genes of the parasite. Detection and identification of Cryptosporidium species was carried out by sequencing of a partial fragment of the small-subunit ribosomal RNA gene.

Principal Findings

The PCR-based prevalences of G. duodenalis and Cryptosporidium spp. were 55.0% (216/393) and 4.6% (18/393), respectively. A total of 78 G. duodenalis isolates were successfully characterized, revealing the presence of sub-assemblages AII (10.3%), BIII (28.2%), and BIV (32.0%). Discordant typing results AII/AIII and BIII/BIV were identified in 7.7% and 15.4% of the isolates, respectively. An additional five (6.4%) isolates were assigned to assemblage B. No mixed infections of assemblages A+B were found. Extensive genetic variation at the nucleotide level was observed within assemblage B (but no within assemblage A), resulting in the identification of a large number of sub-types. Cryptosporidium diversity was demonstrated by the occurrence of C. hominis, C. parvum, and C. viatorum in the population under study.

Conclusions

Our data suggest an epidemiological scenario with an elevated transmission intensity of a wide range of G. duodenalis genetic variants. Importantly, the elevated degree of genetic diversity observed within assemblage B is consistent with the occurrence of intra-assemblage recombination in G. duodenalis.


Url:
DOI: 10.1371/journal.pone.0159992
PubMed: 27466809
PubMed Central: 4965151


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

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<name sortKey="Mulu, Wondemagen" sort="Mulu, Wondemagen" uniqKey="Mulu W" first="Wondemagen" last="Mulu">Wondemagen Mulu</name>
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<name sortKey="Hailu, Tadesse" sort="Hailu, Tadesse" uniqKey="Hailu T" first="Tadesse" last="Hailu">Tadesse Hailu</name>
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<name sortKey="Herrador, Zaida" sort="Herrador, Zaida" uniqKey="Herrador Z" first="Zaida" last="Herrador">Zaida Herrador</name>
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<title xml:lang="en" level="a" type="main">Prevalence and Genetic Diversity of
<italic>Giardia duodenalis</italic>
and
<italic>Cryptosporidium</italic>
spp. among School Children in a Rural Area of the Amhara Region, North-West Ethiopia</title>
<author>
<name sortKey="De Lucio, Aida" sort="De Lucio, Aida" uniqKey="De Lucio A" first="Aida" last="De Lucio">Aida De Lucio</name>
<affiliation wicri:level="3">
<nlm:aff id="aff001">
<addr-line>Parasitology Service, National Centre for Microbiology, Majadahonda, Madrid, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Parasitology Service, National Centre for Microbiology, Majadahonda, Madrid</wicri:regionArea>
<placeName>
<settlement type="city">Madrid</settlement>
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</placeName>
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<author>
<name sortKey="Amor Aramendia, Aranzazu" sort="Amor Aramendia, Aranzazu" uniqKey="Amor Aramendia A" first="Aranzazu" last="Amor-Aramendía">Aranzazu Amor-Aramendía</name>
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<addr-line>National Centre of Tropical Medicine, Madrid, Spain</addr-line>
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</nlm:aff>
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<name sortKey="Saugar, Jose M" sort="Saugar, Jose M" uniqKey="Saugar J" first="José M." last="Saugar">José M. Saugar</name>
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</nlm:aff>
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<settlement type="city">Madrid</settlement>
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<name sortKey="Anegagrie, Melaku" sort="Anegagrie, Melaku" uniqKey="Anegagrie M" first="Melaku" last="Anegagrie">Melaku Anegagrie</name>
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</nlm:aff>
<country xml:lang="fr">Espagne</country>
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<addr-line>Mundo Sano Foundation, Madrid, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
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<placeName>
<settlement type="city">Madrid</settlement>
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</placeName>
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<name sortKey="Arroyo, Ana" sort="Arroyo, Ana" uniqKey="Arroyo A" first="Ana" last="Arroyo">Ana Arroyo</name>
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<nlm:aff id="aff004">
<addr-line>Microbiology and Parasitology Service, La Paz-Carlos III Hospital, Madrid, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Microbiology and Parasitology Service, La Paz-Carlos III Hospital, Madrid</wicri:regionArea>
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<settlement type="city">Madrid</settlement>
<region nuts="2" type="region">Communauté de Madrid</region>
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<name sortKey="L Pez Quintana, Beatriz" sort="L Pez Quintana, Beatriz" uniqKey="L Pez Quintana B" first="Beatriz" last="L Pez-Quintana">Beatriz L Pez-Quintana</name>
<affiliation wicri:level="3">
<nlm:aff id="aff004">
<addr-line>Microbiology and Parasitology Service, La Paz-Carlos III Hospital, Madrid, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Microbiology and Parasitology Service, La Paz-Carlos III Hospital, Madrid</wicri:regionArea>
<placeName>
<settlement type="city">Madrid</settlement>
<region nuts="2" type="region">Communauté de Madrid</region>
</placeName>
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<author>
<name sortKey="Zewdie, Derjew" sort="Zewdie, Derjew" uniqKey="Zewdie D" first="Derjew" last="Zewdie">Derjew Zewdie</name>
<affiliation wicri:level="1">
<nlm:aff id="aff005">
<addr-line>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar, Ethiopia</addr-line>
</nlm:aff>
<country xml:lang="fr">Éthiopie</country>
<wicri:regionArea>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar</wicri:regionArea>
<wicri:noRegion>Bahir Dar</wicri:noRegion>
</affiliation>
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<author>
<name sortKey="Ayehubizu, Zimmam" sort="Ayehubizu, Zimmam" uniqKey="Ayehubizu Z" first="Zimmam" last="Ayehubizu">Zimmam Ayehubizu</name>
<affiliation wicri:level="1">
<nlm:aff id="aff005">
<addr-line>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar, Ethiopia</addr-line>
</nlm:aff>
<country xml:lang="fr">Éthiopie</country>
<wicri:regionArea>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar</wicri:regionArea>
<wicri:noRegion>Bahir Dar</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Yizengaw, Endalew" sort="Yizengaw, Endalew" uniqKey="Yizengaw E" first="Endalew" last="Yizengaw">Endalew Yizengaw</name>
<affiliation wicri:level="1">
<nlm:aff id="aff005">
<addr-line>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar, Ethiopia</addr-line>
</nlm:aff>
<country xml:lang="fr">Éthiopie</country>
<wicri:regionArea>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar</wicri:regionArea>
<wicri:noRegion>Bahir Dar</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Abera, Bayeh" sort="Abera, Bayeh" uniqKey="Abera B" first="Bayeh" last="Abera">Bayeh Abera</name>
<affiliation wicri:level="1">
<nlm:aff id="aff005">
<addr-line>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar, Ethiopia</addr-line>
</nlm:aff>
<country xml:lang="fr">Éthiopie</country>
<wicri:regionArea>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar</wicri:regionArea>
<wicri:noRegion>Bahir Dar</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Yimer, Mulat" sort="Yimer, Mulat" uniqKey="Yimer M" first="Mulat" last="Yimer">Mulat Yimer</name>
<affiliation wicri:level="1">
<nlm:aff id="aff005">
<addr-line>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar, Ethiopia</addr-line>
</nlm:aff>
<country xml:lang="fr">Éthiopie</country>
<wicri:regionArea>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar</wicri:regionArea>
<wicri:noRegion>Bahir Dar</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Mulu, Wondemagen" sort="Mulu, Wondemagen" uniqKey="Mulu W" first="Wondemagen" last="Mulu">Wondemagen Mulu</name>
<affiliation wicri:level="1">
<nlm:aff id="aff005">
<addr-line>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar, Ethiopia</addr-line>
</nlm:aff>
<country xml:lang="fr">Éthiopie</country>
<wicri:regionArea>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar</wicri:regionArea>
<wicri:noRegion>Bahir Dar</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Hailu, Tadesse" sort="Hailu, Tadesse" uniqKey="Hailu T" first="Tadesse" last="Hailu">Tadesse Hailu</name>
<affiliation wicri:level="1">
<nlm:aff id="aff005">
<addr-line>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar, Ethiopia</addr-line>
</nlm:aff>
<country xml:lang="fr">Éthiopie</country>
<wicri:regionArea>Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar</wicri:regionArea>
<wicri:noRegion>Bahir Dar</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Herrador, Zaida" sort="Herrador, Zaida" uniqKey="Herrador Z" first="Zaida" last="Herrador">Zaida Herrador</name>
<affiliation wicri:level="3">
<nlm:aff id="aff002">
<addr-line>National Centre of Tropical Medicine, Madrid, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>National Centre of Tropical Medicine, Madrid</wicri:regionArea>
<placeName>
<settlement type="city">Madrid</settlement>
<region nuts="2" type="region">Communauté de Madrid</region>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Fuentes, Isabel" sort="Fuentes, Isabel" uniqKey="Fuentes I" first="Isabel" last="Fuentes">Isabel Fuentes</name>
<affiliation wicri:level="3">
<nlm:aff id="aff001">
<addr-line>Parasitology Service, National Centre for Microbiology, Majadahonda, Madrid, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Parasitology Service, National Centre for Microbiology, Majadahonda, Madrid</wicri:regionArea>
<placeName>
<settlement type="city">Madrid</settlement>
<region nuts="2" type="region">Communauté de Madrid</region>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Carmena, David" sort="Carmena, David" uniqKey="Carmena D" first="David" last="Carmena">David Carmena</name>
<affiliation wicri:level="3">
<nlm:aff id="aff001">
<addr-line>Parasitology Service, National Centre for Microbiology, Majadahonda, Madrid, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Parasitology Service, National Centre for Microbiology, Majadahonda, Madrid</wicri:regionArea>
<placeName>
<settlement type="city">Madrid</settlement>
<region nuts="2" type="region">Communauté de Madrid</region>
</placeName>
</affiliation>
</author>
</analytic>
<series>
<title level="j">PLoS ONE</title>
<idno type="eISSN">1932-6203</idno>
<imprint>
<date when="2016">2016</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc>
<textClass></textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">
<sec id="sec001">
<title>Backgroud</title>
<p>
<italic>Giardia duodenalis</italic>
and
<italic>Cryptosporidium</italic>
spp. are enteric protozoan causing gastrointestinal illness in humans and animals. Giardiasis and cryptosporidiosis are not formally considered as neglected tropical diseases, but belong to the group of poverty-related infectious diseases that impair the development and socio-economic potential of infected individuals in developing countries.</p>
</sec>
<sec id="sec002">
<title>Methods</title>
<p>We report here the prevalence and genetic diversity of
<italic>G</italic>
.
<italic>duodenalis</italic>
and
<italic>Cryptosporidium</italic>
spp. in children attending rural primary schools in the Bahir Dar district of the Amhara Region, Ethiopia. Stool samples were collected from 393 children and analysed by molecular methods.
<italic>G</italic>
.
<italic>duodenalis</italic>
was detected by real-time PCR, and the assemblages and sub-assemblages were determined by multilocus sequence-based genotyping of the glutamate dehydrogenase and β-giardin genes of the parasite. Detection and identification of
<italic>Cryptosporidium</italic>
species was carried out by sequencing of a partial fragment of the small-subunit ribosomal RNA gene.</p>
</sec>
<sec id="sec003">
<title>Principal Findings</title>
<p>The PCR-based prevalences of
<italic>G</italic>
.
<italic>duodenalis</italic>
and
<italic>Cryptosporidium</italic>
spp. were 55.0% (216/393) and 4.6% (18/393), respectively. A total of 78
<italic>G</italic>
.
<italic>duodenalis</italic>
isolates were successfully characterized, revealing the presence of sub-assemblages AII (10.3%), BIII (28.2%), and BIV (32.0%). Discordant typing results AII/AIII and BIII/BIV were identified in 7.7% and 15.4% of the isolates, respectively. An additional five (6.4%) isolates were assigned to assemblage B. No mixed infections of assemblages A+B were found. Extensive genetic variation at the nucleotide level was observed within assemblage B (but no within assemblage A), resulting in the identification of a large number of sub-types.
<italic>Cryptosporidium</italic>
diversity was demonstrated by the occurrence of
<italic>C</italic>
.
<italic>hominis</italic>
,
<italic>C</italic>
.
<italic>parvum</italic>
, and
<italic>C</italic>
.
<italic>viatorum</italic>
in the population under study.</p>
</sec>
<sec id="sec004">
<title>Conclusions</title>
<p>Our data suggest an epidemiological scenario with an elevated transmission intensity of a wide range of
<italic>G</italic>
.
<italic>duodenalis</italic>
genetic variants. Importantly, the elevated degree of genetic diversity observed within assemblage B is consistent with the occurrence of intra-assemblage recombination in
<italic>G</italic>
.
<italic>duodenalis</italic>
.</p>
</sec>
</div>
</front>
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<analytic>
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<biblStruct>
<analytic>
<author>
<name sortKey="Cooper, Ma" uniqKey="Cooper M">MA Cooper</name>
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<name sortKey="Adam, Rd" uniqKey="Adam R">RD Adam</name>
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<analytic>
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<biblStruct>
<analytic>
<author>
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<name sortKey="Jerlstrom Hultqvist, J" uniqKey="Jerlstrom Hultqvist J">J Jerlström-Hultqvist</name>
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<name sortKey="Ankarklev, J" uniqKey="Ankarklev J">J Ankarklev</name>
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</div1>
</back>
</TEI>
<affiliations>
<list>
<country>
<li>Espagne</li>
<li>Éthiopie</li>
</country>
<region>
<li>Communauté de Madrid</li>
</region>
<settlement>
<li>Madrid</li>
</settlement>
</list>
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<region name="Communauté de Madrid">
<name sortKey="De Lucio, Aida" sort="De Lucio, Aida" uniqKey="De Lucio A" first="Aida" last="De Lucio">Aida De Lucio</name>
</region>
<name sortKey="Amor Aramendia, Aranzazu" sort="Amor Aramendia, Aranzazu" uniqKey="Amor Aramendia A" first="Aranzazu" last="Amor-Aramendía">Aranzazu Amor-Aramendía</name>
<name sortKey="Amor Aramendia, Aranzazu" sort="Amor Aramendia, Aranzazu" uniqKey="Amor Aramendia A" first="Aranzazu" last="Amor-Aramendía">Aranzazu Amor-Aramendía</name>
<name sortKey="Anegagrie, Melaku" sort="Anegagrie, Melaku" uniqKey="Anegagrie M" first="Melaku" last="Anegagrie">Melaku Anegagrie</name>
<name sortKey="Anegagrie, Melaku" sort="Anegagrie, Melaku" uniqKey="Anegagrie M" first="Melaku" last="Anegagrie">Melaku Anegagrie</name>
<name sortKey="Arroyo, Ana" sort="Arroyo, Ana" uniqKey="Arroyo A" first="Ana" last="Arroyo">Ana Arroyo</name>
<name sortKey="Bailo, Bego A" sort="Bailo, Bego A" uniqKey="Bailo B" first="Bego A" last="Bailo">Bego A Bailo</name>
<name sortKey="Carmena, David" sort="Carmena, David" uniqKey="Carmena D" first="David" last="Carmena">David Carmena</name>
<name sortKey="Fuentes, Isabel" sort="Fuentes, Isabel" uniqKey="Fuentes I" first="Isabel" last="Fuentes">Isabel Fuentes</name>
<name sortKey="Herrador, Zaida" sort="Herrador, Zaida" uniqKey="Herrador Z" first="Zaida" last="Herrador">Zaida Herrador</name>
<name sortKey="L Pez Quintana, Beatriz" sort="L Pez Quintana, Beatriz" uniqKey="L Pez Quintana B" first="Beatriz" last="L Pez-Quintana">Beatriz L Pez-Quintana</name>
<name sortKey="Saugar, Jose M" sort="Saugar, Jose M" uniqKey="Saugar J" first="José M." last="Saugar">José M. Saugar</name>
</country>
<country name="Éthiopie">
<noRegion>
<name sortKey="Zewdie, Derjew" sort="Zewdie, Derjew" uniqKey="Zewdie D" first="Derjew" last="Zewdie">Derjew Zewdie</name>
</noRegion>
<name sortKey="Abera, Bayeh" sort="Abera, Bayeh" uniqKey="Abera B" first="Bayeh" last="Abera">Bayeh Abera</name>
<name sortKey="Ayehubizu, Zimmam" sort="Ayehubizu, Zimmam" uniqKey="Ayehubizu Z" first="Zimmam" last="Ayehubizu">Zimmam Ayehubizu</name>
<name sortKey="Hailu, Tadesse" sort="Hailu, Tadesse" uniqKey="Hailu T" first="Tadesse" last="Hailu">Tadesse Hailu</name>
<name sortKey="Mulu, Wondemagen" sort="Mulu, Wondemagen" uniqKey="Mulu W" first="Wondemagen" last="Mulu">Wondemagen Mulu</name>
<name sortKey="Yimer, Mulat" sort="Yimer, Mulat" uniqKey="Yimer M" first="Mulat" last="Yimer">Mulat Yimer</name>
<name sortKey="Yizengaw, Endalew" sort="Yizengaw, Endalew" uniqKey="Yizengaw E" first="Endalew" last="Yizengaw">Endalew Yizengaw</name>
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</tree>
</affiliations>
</record>

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