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Yasen Mutafchiev

Yasen Mutafchiev's picture

Personal information


Curriculum vitae

2009: PhD in Parasitology, Central Laboratory of General Ecology, Bulgarian Academy of Sciences; Thesis: Species diversity of the nematodes of the superfamily Acuarioidea (Spirurida) in Bulgaria. (supervisor Dr B.B. Georgiev, homepage)

2005: MSc in Zoology of Invertebrate Animals, Department of Zoology and Anthropology, Faculty of Biology, Sofia University "St. Kliment Ohridski"; Thesis: Investigation of the entomopathogenic nematodes (Rhabditida: Steinernematidae, Heterorhabditidae) in the vicinity of the village of Zheleznitsa

2003: BSc in Biology, Faculty of Biology, Sofia University "St. Kliment Ohridski"


2015-present: Associate Professor, Department of Animal Diversity and Resources, Institute of Biodiversity and Ecosystem Research, BAS

2015-2017: Associate Professor, Department of Animal Diversity and Resources, Institute of Biodiversity and Ecosystem Research, BAS

2010: Research Fellow, Department of Animal Diversity and Resources, Institute of Biodiversity and Ecosystem Research, BAS

2009: Biologist, Department of Biodiversity, Central Laboratory of General Ecology, BAS

2005: Biologist, Department of Biodiversity, Central Laboratory of General Ecology, BAS

Postdoctoral Fellowships:

- Département des invertébrés, Muséum d'Histoire Naturelle, Ville de Genève (1.10.2013-30.9.2014). Postdoctoral research visit granted by SCIEX programme. Project: Diversity and phylogenetic relationships within the parasitic nematode family Acuariidae. (Dr J. Mariaux)

- Muséum National d'Histoire Naturelle, Paris (10.05-8.07.2010). (Dr O. Bain)

Research Visits:

- Bari University, Italy (1.10-21.12.2015). (Prof. D. Otranto)

- Natural History Museum, London (19.04–16.05.2015), granted by Synthesys, EC; Morphological and molecular study of the zooparasitic nematodes of the family Acuariidae (Nematoda, Spirurida). (Ms Eileen Harris)

- Muséum National d'Histoire Naturelle, Paris (1.03-31.05.2013). (Dr C. Martin)

- Bari University, Italy (19.01-2.02.2013). (Prof. D. Otranto)

- Museum für Naturkunde, Berlin (28.05-18.06.2012), granted by Synthesys 2, EC; Project: DE-TAF-1825: Examination of type and voucher materials of the families Habronematidae and Tetrameridae (Nematoda, Spirurida, Habronematoidea) deposited in the Museum für Naturkunde Berlin. (Dr B. Neuhaus)

- Muséum National d'Histoire Naturelle, Paris (1.10-31.10.2011). (Dr O. Bain)

- Muséum National d'Histoire Naturelle, Paris (1.07-31.07.2011). (Dr O. Bain)

- Muséum National d'Histoire Naturelle, Paris (9.06-30.06.2011), granted by Synthesys 2, EC; Project: Morphological examination of acuariid nematodes (Nematoda, Spirurida) deposited in the Muséum National d'Histoire Naturelle, Paris. (Dr O. Bain)

- Naturhistorisches Museum Wien (11.04-2.05.2010), granted by Synthesys 2, EC; Project: Morphology examination of specimens of the family Acuariidae (Nematoda: Spirurida) deposited in the Natural History Museum of Vienna. (Dr H. Sattmann)

- Département des invertébrés, Muséum d'Histoire Naturelle, Ville de Genève (2.11-14.11.2009). (Dr J. Mariaux)

- Museum für Naturkunde der Humboldt Univesität zu Berlin (18.11-14.12.2007), granted by Synthesys, EC; Project: Examination of the type specimens of the Acuarioidea (Nematoda) deposited in the Museum für Naturkunde, Berlin and morphological study on other acuarioideans. (Dr B. Neuhaus)

Research interests

Morphology, taxonomy and evolution of zooparasitic nematodes


at Google Scholar

Stoyanov B, Mutafchiev Y, Georgiev BB (2023) Helminth parasites of the three-spined stickleback Gasterosteus aculeatus L., 1758 (Actinopterygii: Gasterosteidae) from a Black Sea Coastal Wetland, Bulgaria. Acta Zoologica Bulgarica, Open access

Mutafchiev Y, Vergilov V (2023) Redescription of Thubunaea schukurovi Annaev, 1973 from Ablepharus chernovi, with notes on the members of Thubunaea (Spirurida: Physalopteridae) from the Palaearctic and Indomalayan realms. Journal of Helminthology. 97, e39, 1–7.

Kachamakova M, Mutafchiev Y, Nikolov PN, Koshev Y (2023) Conservation of host, translocation of parasites—monitoring of helminths during population reinforcement of the European ground squirrel (Spermophilus citellus). Diversity, 155(2), 266.

Mutafchiev Y, Georgiev BB (2023) Morphology of Streptocara crassicauda and S. recta, with a review of the genus Streptocara (Nematoda: Acuariidae) and an identification key to its species. Diversity, 15(1), 266.


Mutafchiev Y, Georgiev BB, Mariaux J (2020) A 28S rDNA‐based phylogeny of the nematode family Acuariidae (Spirurida) parasitic in vertebrates. Zoologica Scripta, 49: 641–657.


Junker K, Boomker J, Govender D, Mutafchiev Y (2019) Nematodes found in Nile crocodiles in the Kruger National Park, South Africa, with redescriptions of Multicaecum agile (Wedl, 1861) (Heterocheilidae) and Camallanus kaapstaadi Southwell & Kirshner, 1937 (Camallanidae). Systematic Parasitology, 96: 381–398.


Stoyanov B, Mutafchiev Y, Pankov P, Georgiev BB (2018) Helminths and helminth communities of the Caucasian dwarf goby Knipowitschia caucasica (Berg) (Actinopterygii: Gobionellidae) from lake Atanasovsko, Bulgaria. Acta Zoologica Bulgarica, 70: 225-240. Open access


Stoyanov B, Mutafchiev Y, Pankov P, Georgiev BB (2017) Helminth parasites in the alien Lepomis gibbosus (L.) (Centrarchidae) from the Lake Atanasovsko Wetlands, Bulgaria: survey of species and structure of helminth communities. Acta Zoologica Bulgarica, 69: 555–574. Open access

Junker K, Mutafchiev Y (2017) Typhlophoros kwenae n. sp. (Nematoda: Ascaridida: Heterocheilidae), a gastric parasite from the Nile crocodile Crocodylus niloticus Laurenti (Reptilia: Crocodylidae) in South Africa. Systematic Parasitology, 4: 971–978.

Junker K, Mutafchiev Y (2017) Ingwenascaris n. g. (Nematoda: Ascaridida: Heterocheilidae) established for I. sprenti n. sp. and I. assymmetrica (Ortlepp, 1932) n. comb., parasites of African crocodiles and an identification key to the genera of Heterocheilidae. Systematic Parasitology, 94: 849–859.

Junker K, Mutafchiev Y (2017) Micropleura huchzermeyeri n. sp. (Camallanida: Dracunculoidea: Micropleuridae) from the Nile crocodile, Crocodylus niloticus Laurenti (Reptilia: Crocodylidae), in South Africa. Systematic Parasitology, 94: 785–795.

Lefoulon E, Giannelli A, Makepeace BL, Mutafchiev Y, Townson S, Uni S, Verocai GG, Otranto D, Martin C (2017) Whence river blindness? The domestication of mammals and host-parasite co-evolution in the nematode genus Onchocerca. International Journal for Parasitology, 47: 457–470.

Junker K, Lutermann J, Mutafchiev Y (2017) A new ascaridid nematode, Mammalakis zambiensis n. sp. (Heterakoidea: Kiwinematidae), from the mole rat Fukomys anselli (Burda, Zima, Scharff, Macholán & Kawalika) (Rodentia: Bathyergidae) in Zambia. Systematic Parasitology, 94: 557–566.

Mutafchiev Y, Mariaux J, Georgiev BB (2017) Description of Acuaria europaea n. sp. (Spirurida: Acuariidae) from Dendrocopos syriacus (Hemprich & Ehrenberg) and Oriolus oriolus (L.) (Aves) in Europe, with results of re-examination of related European species of Acuaria Bremser, 1811. Systematic Parasitology, 94: 201–214.

Lia RP, Mutafchiev Y, Veneziano V, Giannelli A, Abramo F, Santoro M, Latrofa MS, Cantacessi C, Martin C, Otranto D, Bertuglia A, Riccio B (2016) Filarial infection caused by Onchocerca boehmi (Supperer, 1953) in a horse from Italy. Parasitology Research, 116: 191–198.


Mutafchiev Y (2016) Descriptions of two new species of Quasithelazia Maplestone, 1932 (Spirurida: Acuariidae) and a redescription of Alinema sturni Jögis, 1968 from birds in Australia. Systematic Parasitology, 93 (6): 539-550. DOI:10.1007/s11230-016-9650-z

Colella V, Mutafchiev Y, Cavalera MA, Giannelli A, Lia RP, Dantas-Torres F, Otranto D (2016) Development of Crenosoma vulpis in the common garden snail Cornu aspersum: implications for epidemiological studies. Parasites & Vectors, 9:208. DOI:10.1186/s13071-016-1483-8 Open access


Lefoulon E, Bain O, Bourret J, Junker K, Guerrero R, Cañizales I, Kuzmin Y, Satoto TBT, Cardenas JM, de Souza Lima S, Raccurt C, Mutafchiev Y, Gavotte L, Martin C (2015) Shaking the tree: Multi-locus sequence typing usurps current onchocercid (filarial nematode) phylogeny. PLOS Neglected Tropical Diseases, DOI:10.1371/journal.pntd.0004233 Open access

Junker K, Mariaux J, Measey GJ, Mutafchiev Y (2015) Meteterakis saotomensis n. sp. (Nematoda: Heterakidae) from Schistometopum thomense (Bocage) (Gymnophiona: Dermophiidae) on São Tomé Island. Systematic Parasitology, 92: 131-139. DOI:10.1007/s11230-015-9588-6

Latrofa MS, Lia RP, Giannelli A, Colella V, Santoro M, D’Alessio N, Gentilini F, Campbell BE, Parisi A, Dantas-Torres F, Mutafchiev Y, Veneziano V, Otranto D (2015) Crenosoma vulpis in wild and domestic carnivores from Italy: a morphological and molecular study. Parasitology Research, 114: 3611-3617. DOI:10.1007/s00436-015-4583-z

Redón S, Berthelemy NJ, Mutafchiev Y, Amat F, Georgiev BB, Vasileva GP (2015) Helminth parasites of Artemia franciscana (Crustacea, Branchiopoda) in the Great Salt Lake, Utah: first data from the native range of this invader in European wetlands. Folia Parasitologica, 62:030. DOI: 10.14411/fp.2015.030 Open access

Bain O, Mutafchiev Y, Junker K, Guerrero R, Martin C, Lefoulon E, Uni S (2015) Review of the genus Mansonella Faust, 1929 sensu lato (Nematoda: Onchocercidae), with descriptions of a new subgenus and a new subspecies. Zootaxa, 3918 (2): 151–193. DOI:10.11646/zootaxa.3918.2.1 Open access

Mutafchiev Y, Mariaux J, Georgiev BB (2015) Stammerinema hyalinum n. comb. for Filaria hyalina von Linstow, 1890 and its recognition as a senior synonym of Stammerinema rhopalocephalum (Sołtys, 1952) (Spirurida: Acuariidae), a parasite of shrews. Systematic Parasitology, 90 (1): 105-111. DOI:10.1007/s11230-014-9540-1

Lefoulon E, Kuzmin Y, Plantard O, Mutafchiev Y, Otranto D, Martin C, Bain О (2014) Redescription of Cercopithifilaria rugosicauda (Böhm & Supperer, 1953) (Spirurida: Onchocercidae) of roe deer, with an emended diagnosis of the genus Cercopithifilaria and a genetic characterisation. Parasitology International, 63 (6): 808–816. DOI:10.1016/j.parint.2014.07.011

Mutafchiev Y, Mariaux J, Georgiev BB (2014) Description of Proyseria petterae n. sp., with an amended generic diagnosis and a review of the species of Proyseria Petter, 1959 and Stegophorus Wehr, 1934 (Nematoda: Acuariidae). Systematic Parasitology, 89 (1): 3–14. DOI:10.1007/s11230-014-9507-2

Georgiev BB, Angelov A, Vasileva GP, Sánchez MI, Hortas F, Mutafchiev Y, Pankov P, Green AJ (2014) Larval helminths in the invasive American brine shrimp Artemia franciscana throughout its annual cycle. Acta Parasitologica, 59 (3): 380–389.

Mutafchiev Y, Mariaux J, Georgiev BB (2014) Two new species of Quasithelazia Maplestone, 1932 (Nematoda: Acuariidae) from Malaysia, with an amended diagnosis and review of the genus. Systematic Parasitology, 88 (2): 103–117. DOI:10.1007/s11230-014-9483-6

Mutafchiev Y, Bain O, Williams Z, McCall JW, Michalski ML (2014) Intraperitoneal development of filarial nematode Brugia malayi in the Mongolian jird (Meriones unguiculatus). Parasitology Research, 113 (5): 1827–1835. DOI:10.1007/s00436-014-3829-5 Open access

Bain O, Mutafchiev Y, Junker K (2014) Order Spirurida. In: Schmidt-Rhaesa A (Ed.) Handbook of Zoology: Gastrotricha, Cycloneuralia and Gnathifera. Volume 2. Nematoda. De Gruyter: Berlin-Boston, pp. 661–732. DOI:10.1515/9783110274257.661

Otranto D, Dantas-Torres F, Giannelli A, Abramo F, Ignjatović Ćupina A, Petrić D, Cardoso L, Mutafchiev Y, Cortes H (2013) Cutaneous distribution and circadian rhythm of Onchocerca lupi microfilariae in dogs. PLoS Neglected Tropical Diseases, 7(12): e2585. DOI:10.1371/journal.pntd.0002585

Giannelli A, Ramos RAN, Annoscia G, Di Cesare A, Colella V, Brianti E, Dantas-Torres F, Mutafchiev Y, Otranto D (2013) Development of the feline lungworms Aelurostrongylus abstrusus and Troglostrongylus brevior in Helix aspersa snails. Parasitology, 141: 563–569. DOI:10.1017/S003118201300187X

Mutafchiev Y, Dantas-Torres F, Giannelli A, Abramo F, Papadopoulos E, Cardoso L, Cortes H, Otranto D (2013) Redescription of Onchocerca lupi (Spirurida: Onchocercidae), with histopathological observations. Parasites & Vectors, 6:309. DOI:10.1186/1756-3305-6-309 Open access

Ramos RAN, Giannelli G, Dantas-Torres F, Mallia E, Passantino G, Lia RP, Latrofa MS, Mutafchiev Y, Otranto D (2013) Cercopithifilaria rugosicauda (Spirurida, Onchocercidae) in a roe deer and ticks from southern Italy. International Journal for Parasitology: Parasites and Wildlife, 2: 292–296. DOI:10.1016/j.ijppaw.2013.09.009 Open access

Junker K, Lane EP, McRee AE, Foggin C, van Dyk DS, Mutafchiev Y (2013) Two new species of Cylicospirura Vevers, 1922 (Nematoda: Spirocercidae) from carnivores in southern Africa, with validation of the related genera Gastronodus Singh, 1934 and Skrjabinocercina Matschulsky, 1952. Folia Parasitologica, 60 (4): 339–352. Open access

Mutafchiev Y, Kontrimavichus VL, Georgiev BB (2013) Redescriptions and comments on the validity of Acuaria subula and A. skrjabini (Nematoda, Spirurida, Acuariidae), parasites of passerine birds. Acta Parasitologica, 53 (3): 284–296. DOI:10.2478/s11686-013-0141-y

Otranto D, Varcasia A, Solinas C, Scala A, Brianti E, Dantas-Torres F, Annoscia G, Martin C, Mutafchiev Y, Bain O (2013) Redescription of Cercopithifilaria bainae Almeida et Vicente, 1984 (Spirurida, Onchocercidae) from a dog in Sardinia, Italy. Parasites & Vectors, 16:132. DOI:10.1186/1756-3305-6-132 Open access

Otranto D, Brianti E, Dantas-Torres F, Mirό G, Latrofa MS, Mutafchiev Y, Bain O (2013) Species diversity of dermal microfilariae of the genus Cercopithifilaria infesting dogs in the Mediterranean region. Parasitology, 140 (1): 99–108. DOI:10.1017/S0031182012001357


Gradinarov D, Petrova E, Mutafchiev Y, Karadjova O (2012) Distribution of entomopathogenic nematodes of the genus Heterorhabditis (Rhabditida: Heterorhabditidae) in Bulgaria. Nematologia Mediterranea, 40 (2): 173–180. Open access

Fall EH, Diagne M, Martin C, Mutafchiev Y, Granjon L, Ba K, Junker K, Bain O (2012) Trichosomoides nasalis (Nematoda: Trichinelloidea) in the murid host Arvicanthis niloticus: migration to the epithelium of the nasal mucosa after intramuscular development. Parasite, 19 (4): 359–365. DOI:10.1051/parasite/ Open access

Mutafchiev Y, Kinsella JM (2012) Redescription of Chabaudacuaria multispinosa (Pérez Vigueras, 1938) n. g., n. comb. (Nematoda: Spirurida: Acuariidae) based on specimens from Ardea herodias L. and Nyctanassa violacea (L.) (Ardeidae) in Florida. Systematic Parasitology, 83 (2): 85–93. DOI:10.1007/s11230-012-9372-9

Otranto D, Dantas-Torres F, Cebeci Z, Yeniad B, Buyukbabani N, Buyukbaba Boral O, Gustinelli A, Mounir T, Mutafchiev Y, Bain O (2012) Human ocular filariasis: further evidence on the zoonotic role of Onchocerca lupi. Parasites & Vectors, 5:84. DOI:10.1186/1756-3305-5-84. Open access

Mutafchiev Y, Mariaux J, Georgiev BB (2012) Acuaria paraguayensis n. sp. from Sirystes sibilator (Aves: Tyrannidae) in Paraguay and а redescription of A. mamillaris (Molin, 1860) from Cyanocorax cayanus (Corvidae) in Brazil, with a key to the species of Acuaria Bremser, 1811 (Nematoda: Acuariidae) in the New World. Systematic Parasitology, 81: 51–64. DOI:10.1007/s11230-011-9322-y


Mutafchiev Y, Georgiev BB (2011) Redescription, generic allocation and synonymy of Decorataria magnilabiata (Molin, 1860) n. comb. (Nematoda: Spirurida: Acuariidae), a parasite of the roseate spoonbill Platalea ajaja L. (Aves: Threskiornithidae) in South America. Systematic Parasitology, 80 (1): 17–22. DOI:10.1007/s11230-011-9302-2


Mutafchiev Y, Georgiev BB (2010) The erection of Pelecanema n. g. (Nematoda: Spirurida: Acuariidae), with redescriptions of Pelecanema sirry (Khalil, 1931) n. comb. and P. pelecani (Johnston & Mawson, 1942) n. comb. Systematic Parasitology, 77 (1): 45–54. DOI:10.1007/s11230-010-9259-6

Mutafchiev Y, Santoro M, Georgiev BB (2010) Parachordatortilis n. g. (Nematoda: Spirurida: Acuariidae), with a redescription of P. mathevossianae (Petrov & Chertkova, 1950) n. comb., a parasite of Falco tinnunculus L. (Aves: Falconiformes). Systematic Parasitology, 76 (3): 191–197. DOI:10.1007/s11230-010-9243-1

Mutafchiev Y, Halajian A, Georgiev BB (2010) Two new nematode species of the genus Cosmocephalus Molin, 1858 (Spirurida: Acuariidae), with an amended generic diagnosis and an identification key to Cosmocephalus spp. Zootaxa, 2349: 1–20. DOI: 10.11646/zootaxa.2349.1.1 Open access


Mutafchiev Y, Zehtindjiev P, Georgiev BB (2009) First record of the nematode Aviculariella alcedonis (Yamaguti & Mitunaga, 1943) (Spirurida, Acuariidae) in Europe, with SEM observations and comments on its taxonomic position. Acta Parasitologica, 54 (4): 374–379. DOI:10.2478/s11686-009-0057-8

Mutafchiev Y, Georgiev BB (2009) Redescription of Desportesius brevicaudatus (Spirurida, Acuariidae) based on nematodes from Ixobrychus minutus (Aves, Ciconiiformes) from Bulgaria. Helminthologia, 46 (2): 90–96. DOI:10.2478/s11687-009-0018-7


Mutafchiev Y, Georgiev BB (2008) Redescription of Decorataria decorata (Spirurida, Acuariidae) based on nematodes from Podiceps cristatus and P. grisegena (Aves, Podicipediformes) from Bulgaria. Acta Parasitologica, 53 (2): 158–164. DOI:10.2478/s11686-008-0016-9

Mutafchiev Y, Georgiev BB (2008) A new acuariid nematode, Syncuaria mackoi n. sp. (Spirurida), from Ciconia nigra (L.) (Ciconiiformes: Ciconiidae) in Europe. Systematic Parasitology, 70 (1): 71–79. DOI:10.1007/s11230-008-9138-6


Mutafchiev Y, Gradinarov D (2003) Entomopathogenic nematodes of the families Steinernematidae and Heterorhabditidae (Rhabditida) in the vicinity of the Zheleznitsa village, Vitosha Mts., Bulgaria. Acta Zoologica Bulgarica, 55 (2): 67–74.

New Genera
Ingwenascaris Junker et Mutafchiev, 2017 (Heterocheilidae)
Chabaudacuaria Mutafchiev et Kinsella, 2012 (Acuariidae)
Pelecanema Mutafchiev et Georgiev, 2010 (Acuariidae)
Parachordatortilis Mutafchiev, Santoro et Georgiev, 2010 (Acuariidae)

New Species
Typhlophoros kwenae Junker et Mutafchiev, 2017 (Heterocheilidae)
Ingwenascaris sprenti Junker et Mutafchiev, 2017 (Heterocheilidae)
Micropleura huchzermeyeri Junker et Mutafchiev, 2017 (Micropleuridae)
Mammalakis zambiensis Junker, Lutermann et Mutafchiev, 2017 (Kiwinematidae)
Acuaria europaea Mutafchiev, Mariaux et Georgiev, 2017 (Acuariidae)
Quasithelazia minuta Mutafchiev, 2016 (Acuariidae)
Quasithelazia pearsoni Mutafchiev, 2016 (Acuariidae)
Meteterakis saotomensis Junker, Mariaux, Measey, Mutafchiev, 2015 (Heterakidae)
Proyseria petterae Mutafchiev, Mariaux et Georgiev, 2014 (Acuariidae)
Quasithelazia rostrata Mutafchiev, Mariaux et Georgiev, 2014 (Acuariidae)
Quasithelazia alata Mutafchiev, Mariaux et Georgiev, 2014 (Acuariidae)
Cylicospirura crocutae Junker et Mutafchiev, 2013 (Spirocercidae)
Cylicospirura pardalis Junker et Mutafchiev, 2013 (Spirocercidae)
Acuaria paraguayensis Mutafchiev, Mariaux et Georgiev, 2012 (Acuariidae)
Cosmocephalus podicipis Mutafchiev, Halajian et Georgiev, 2010 (Acuariidae)
Cosmocephalus pelecani Mutafchiev, Halajian et Georgiev, 2010 (Acuariidae)
Syncularia mackoi Mutafchiev et Georgiev, 2008 (Acuariidae)


Department of Animal Diversity and Resources
Division of Parasite Diversity and Ecology
Research group
Research Group of Helminth Taxonomy, evolution and Ecology


Member for
12 years 37 weeks