Daniel Młocicki | Medical University of Warsaw (original) (raw)

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Papers by Daniel Młocicki

Research paper thumbnail of Ultrastructural reconstruction of Taenia ovis oncospheres from serial sections

International journal for parasitology, 2010

Research paper thumbnail of Cellular organization of the oncosphere of Mosgovoyia ctenoides (Cestoda: Anoplocephalidae)

The Journal of parasitology, 2006

The ultrastructure of the infective oncosphere of the cestode Mosgovoyia ctenoides (Anoplocephali... more The ultrastructure of the infective oncosphere of the cestode Mosgovoyia ctenoides (Anoplocephalidae) is described. The surface of the infective oncosphere is covered by a thin cytoplasmic layer of tegument connected by a narrow cytoplasmic process with the binucleate subtegumental cell, situated deeper in the body. Below the basal matrix of the cytoplasmic layer of the tegument are situated wide bands of the peripheral, somatic musculature responsible for body movements. The 3 pairs of hooks and their muscles form a complex hook muscle system, responsible for coordinated hook action. Five major types of cells have been distinguished: (1) a binucleate subtegumental cell, (2) a binucleate penetration gland, (3) 2 nerve cells, (4) numerous somatic cells, and (5) about 6 germinative cells. The approximate number of cells is 24 (26 nuclei, including 2 syncytial structures). The results of this study, when compared with other published reports from other cestode taxa, support previous hy...

Research paper thumbnail of Ultrastructure of the tegument of the anoplocephalid cestode Mosgovoyia ctenoides (Railliet, 1890) Beveridge, 1978

Wiadomości parazytologiczne, 2004

The tegument of the mature proglottids of M. ctenoides was examined by means of TEM. The tegument... more The tegument of the mature proglottids of M. ctenoides was examined by means of TEM. The tegument of this species consists of two layers: (1) the external cytoplasm, and (2) the tegumental perikarya situated in the cortical parenchyma. The tegument surface is covered by typical microtriches. The anucleated external layer of cytoplasm is rich in vesicles of different shape and electron-density, but it lacks mitochondria. Large pore canals penetrate the external cytoplasmic layer. This layer is separated from the perikarya by a basal lamina, being connected with the tegument cell bodies by cytoplasmic bridges. The granular cytoplasm of perikarya contains typical cell organelles such as mitochondria, GER, Golgi complexes, free rybosomes, numerous vesicles and lipid droplets inclusions. The large nuclei of the perikarya with prominent nucleoli frequently contain large intranuclear, highly osmiophilic lipid droplets.

Research paper thumbnail of Ultrastructural and cytochemical studies on vitellogenesis in trypanorhynch cestode Dollfusiella spinulifera Beveridge, Neifar et Euzet, 2004 (Eutetrarhynchidae)

Research paper thumbnail of A Review and Synthesis of Ultrastructure and Development of Embryonic Structures in Parasitic Neodermatan Flatworms

Research paper thumbnail of Postembryonic development and ultrastructural characteristics of the polycephalic larva of Taenia parva Baer, 1926 (Cyclophyllidea, Taeniidae)

Acta Parasitologica, 2007

Post-embryonic development and fully-formed polycephalic larvae of Taenia parva Baer, 1926 were e... more Post-embryonic development and fully-formed polycephalic larvae of Taenia parva Baer, 1926 were examined by light (LM) and transmission electron microscopy (TEM). Three developmental stages were recognised: (1) an early stage of exogenous budding at the surface of the central vesicle; (2) a stage of polycephalic cyst development accompanied by segmentation of the growing larval strobile and an obvious decrease in

Research paper thumbnail of Ultrastructure of the spermatozoon of the anoplocephalid cestode Gallegoides arfaai (Mobedi and Ghadirian, 1977) Tenora and Mas-Coma, 1978, an intestinal parasite of the wood mouse (Apodemus sylvaticus Linnaeus, 1758)

Parasitology Research, 2004

Research paper thumbnail of Early intrauterine embryonic development in Khawia sinensis Hsü, 1935 (Cestoda, Caryophyllidea, Lytocestidae), an invasive tapeworm of carp (Cyprinus carpio): an ultrastructural study

Parasitology Research, 2012

Research paper thumbnail of Ultrastructure of the early gravid uterus of Corallobothrium fimbriatum (Cestoda: Proteocephalidea)

Parasitology Research, 2009

The ultrastructure of the uterine epithelium and underlying extracellular matrices has been studi... more The ultrastructure of the uterine epithelium and underlying extracellular matrices has been studied in several cyclophyllideans, but relatively little has been published on uterine fine structure in other cestode orders. To develop comparative data, we initiated a study focusing on a common and widespread genus of the order Proteocephalidea. Adult specimens of Corallobothrium fimbriatum were removed from the small intestine of brown bullhead catfish, Ameiurus nebulosus, from the St. Lawrence River in North America. Early gravid proglottids were examined by light microscopy as whole mounts or diced in buffered glutaraldehyde, processed by standard techniques and examined by as stained sections by light microscopy and by transmission electron microscopy. Voucher specimens were deposited in the Museum of Comparative Zoology at Harvard University. The uterus consisted of an epithelial wall supported basally by an extracellular matrix and parenchyma cells, which together formed epitheliomesenchymal villi at many points. The uterine epithelium consisted of a single thin syncytial layer, folded distally into long epithelial villi that protruded into the lumen at some points. The epithelium's numerous nuclei were very close to the lumen, but bulged along with the perinuclear cytoplasm proximally into the surrounding medullary parenchyma. Each nucleus contained small amounts of evenly dispersed heterochromatin and euchromatin, with a central nucleolus. Numerous mitochondria occurred in the cytoplasm, which was densely filled with free ribosomes but contained scant endomembrane components and showed little evidence of secretory activity. The uterine cells possessed few of the apical microvilli that are typical of some cyclophyllidean species, but the apical plasma membrane and cortical cytoplasm were extensively developed into long microlamellae similar to other species. The basic syncytial nature of the epithelium is similar to that of other cestodes studied previously, but the specific combination of features is unlike any previously described. Based on this one proteocephalidean species, we discerned no pattern that would distinguish between Proteocephalidea and Cyclophyllidea based on uterine structure.

Research paper thumbnail of An ultrastructural study of embryonic envelope formation in the anoplocephalid cestode Mosgovoyia ctenoides (Railliet, 1890) Beveridge, 1978

Parasitology Research, 2005

Research paper thumbnail of Egg formation and the early embryonic development of Aspidogaster limacoides Diesing, 1835 (Aspidogastrea: Aspidogastridae), with comments on their phylogenetic significance

Parasitology International, 2011

Research paper thumbnail of CELLULAR ORGANIZATION OF THE ONCOSPHERE OF MOSGOVOYIA CTENOIDES (CESTODA: ANOPLOCEPHALIDAE)

Journal of Parasitology, 2006

Research paper thumbnail of Ultrastructure of the Early Embryonic Stages of Corallobothrium fimbriatum (Cestoda: Proteocephalidea)

Journal of Parasitology, 2010

Research paper thumbnail of Ultrastructure of oncospheral hook formation in the nematotaeniid cestode, Nematotaenia dispar (Goeze, 1782)

International Journal for Parasitology, 1997

Research paper thumbnail of Ultrastructural reconstruction of Taenia ovis oncospheres from serial sections

International Journal for Parasitology, 2010

Research paper thumbnail of Ultrastructure of spermatogenesis of the anoplocephalid cestode Gallegoides arfaai (Mobedi et Ghadirian, 1977) Tenora et Mas-Coma, 1978

Research paper thumbnail of Fertilization in the cestode Gallegoides arfaai (Mobedi et Ghadirian, 1977) Tenora et Mas-Coma, 1978 (Cyclophyllidea, Anoplocephalidae)

Research paper thumbnail of Ultrastructure and cytochemistry of vitellogenesis in Wenyonia virilis Woodland, 1923 (Cestoda, Caryophyllidea)

Acta Parasitologica, 2009

Research paper thumbnail of Post-embryonic development and ultrastructural characteristics of the polycephalic larva of Taenia parva Baer, 1926 (Cyclophyllidea, Taeniidae)

Acta Parasitologica, 2007

Research paper thumbnail of Advanced stages of embryonic development and cotylocidial morphogenesis in the intrauterine eggs of Aspidogaster limacoides Diesing, 1835 (Aspidogastrea), with comments on their phylogenetic implications

Acta Parasitologica, 2012

Research paper thumbnail of Ultrastructural reconstruction of Taenia ovis oncospheres from serial sections

International journal for parasitology, 2010

Research paper thumbnail of Cellular organization of the oncosphere of Mosgovoyia ctenoides (Cestoda: Anoplocephalidae)

The Journal of parasitology, 2006

The ultrastructure of the infective oncosphere of the cestode Mosgovoyia ctenoides (Anoplocephali... more The ultrastructure of the infective oncosphere of the cestode Mosgovoyia ctenoides (Anoplocephalidae) is described. The surface of the infective oncosphere is covered by a thin cytoplasmic layer of tegument connected by a narrow cytoplasmic process with the binucleate subtegumental cell, situated deeper in the body. Below the basal matrix of the cytoplasmic layer of the tegument are situated wide bands of the peripheral, somatic musculature responsible for body movements. The 3 pairs of hooks and their muscles form a complex hook muscle system, responsible for coordinated hook action. Five major types of cells have been distinguished: (1) a binucleate subtegumental cell, (2) a binucleate penetration gland, (3) 2 nerve cells, (4) numerous somatic cells, and (5) about 6 germinative cells. The approximate number of cells is 24 (26 nuclei, including 2 syncytial structures). The results of this study, when compared with other published reports from other cestode taxa, support previous hy...

Research paper thumbnail of Ultrastructure of the tegument of the anoplocephalid cestode Mosgovoyia ctenoides (Railliet, 1890) Beveridge, 1978

Wiadomości parazytologiczne, 2004

The tegument of the mature proglottids of M. ctenoides was examined by means of TEM. The tegument... more The tegument of the mature proglottids of M. ctenoides was examined by means of TEM. The tegument of this species consists of two layers: (1) the external cytoplasm, and (2) the tegumental perikarya situated in the cortical parenchyma. The tegument surface is covered by typical microtriches. The anucleated external layer of cytoplasm is rich in vesicles of different shape and electron-density, but it lacks mitochondria. Large pore canals penetrate the external cytoplasmic layer. This layer is separated from the perikarya by a basal lamina, being connected with the tegument cell bodies by cytoplasmic bridges. The granular cytoplasm of perikarya contains typical cell organelles such as mitochondria, GER, Golgi complexes, free rybosomes, numerous vesicles and lipid droplets inclusions. The large nuclei of the perikarya with prominent nucleoli frequently contain large intranuclear, highly osmiophilic lipid droplets.

Research paper thumbnail of Ultrastructural and cytochemical studies on vitellogenesis in trypanorhynch cestode Dollfusiella spinulifera Beveridge, Neifar et Euzet, 2004 (Eutetrarhynchidae)

Research paper thumbnail of A Review and Synthesis of Ultrastructure and Development of Embryonic Structures in Parasitic Neodermatan Flatworms

Research paper thumbnail of Postembryonic development and ultrastructural characteristics of the polycephalic larva of Taenia parva Baer, 1926 (Cyclophyllidea, Taeniidae)

Acta Parasitologica, 2007

Post-embryonic development and fully-formed polycephalic larvae of Taenia parva Baer, 1926 were e... more Post-embryonic development and fully-formed polycephalic larvae of Taenia parva Baer, 1926 were examined by light (LM) and transmission electron microscopy (TEM). Three developmental stages were recognised: (1) an early stage of exogenous budding at the surface of the central vesicle; (2) a stage of polycephalic cyst development accompanied by segmentation of the growing larval strobile and an obvious decrease in

Research paper thumbnail of Ultrastructure of the spermatozoon of the anoplocephalid cestode Gallegoides arfaai (Mobedi and Ghadirian, 1977) Tenora and Mas-Coma, 1978, an intestinal parasite of the wood mouse (Apodemus sylvaticus Linnaeus, 1758)

Parasitology Research, 2004

Research paper thumbnail of Early intrauterine embryonic development in Khawia sinensis Hsü, 1935 (Cestoda, Caryophyllidea, Lytocestidae), an invasive tapeworm of carp (Cyprinus carpio): an ultrastructural study

Parasitology Research, 2012

Research paper thumbnail of Ultrastructure of the early gravid uterus of Corallobothrium fimbriatum (Cestoda: Proteocephalidea)

Parasitology Research, 2009

The ultrastructure of the uterine epithelium and underlying extracellular matrices has been studi... more The ultrastructure of the uterine epithelium and underlying extracellular matrices has been studied in several cyclophyllideans, but relatively little has been published on uterine fine structure in other cestode orders. To develop comparative data, we initiated a study focusing on a common and widespread genus of the order Proteocephalidea. Adult specimens of Corallobothrium fimbriatum were removed from the small intestine of brown bullhead catfish, Ameiurus nebulosus, from the St. Lawrence River in North America. Early gravid proglottids were examined by light microscopy as whole mounts or diced in buffered glutaraldehyde, processed by standard techniques and examined by as stained sections by light microscopy and by transmission electron microscopy. Voucher specimens were deposited in the Museum of Comparative Zoology at Harvard University. The uterus consisted of an epithelial wall supported basally by an extracellular matrix and parenchyma cells, which together formed epitheliomesenchymal villi at many points. The uterine epithelium consisted of a single thin syncytial layer, folded distally into long epithelial villi that protruded into the lumen at some points. The epithelium's numerous nuclei were very close to the lumen, but bulged along with the perinuclear cytoplasm proximally into the surrounding medullary parenchyma. Each nucleus contained small amounts of evenly dispersed heterochromatin and euchromatin, with a central nucleolus. Numerous mitochondria occurred in the cytoplasm, which was densely filled with free ribosomes but contained scant endomembrane components and showed little evidence of secretory activity. The uterine cells possessed few of the apical microvilli that are typical of some cyclophyllidean species, but the apical plasma membrane and cortical cytoplasm were extensively developed into long microlamellae similar to other species. The basic syncytial nature of the epithelium is similar to that of other cestodes studied previously, but the specific combination of features is unlike any previously described. Based on this one proteocephalidean species, we discerned no pattern that would distinguish between Proteocephalidea and Cyclophyllidea based on uterine structure.

Research paper thumbnail of An ultrastructural study of embryonic envelope formation in the anoplocephalid cestode Mosgovoyia ctenoides (Railliet, 1890) Beveridge, 1978

Parasitology Research, 2005

Research paper thumbnail of Egg formation and the early embryonic development of Aspidogaster limacoides Diesing, 1835 (Aspidogastrea: Aspidogastridae), with comments on their phylogenetic significance

Parasitology International, 2011

Research paper thumbnail of CELLULAR ORGANIZATION OF THE ONCOSPHERE OF MOSGOVOYIA CTENOIDES (CESTODA: ANOPLOCEPHALIDAE)

Journal of Parasitology, 2006

Research paper thumbnail of Ultrastructure of the Early Embryonic Stages of Corallobothrium fimbriatum (Cestoda: Proteocephalidea)

Journal of Parasitology, 2010

Research paper thumbnail of Ultrastructure of oncospheral hook formation in the nematotaeniid cestode, Nematotaenia dispar (Goeze, 1782)

International Journal for Parasitology, 1997

Research paper thumbnail of Ultrastructural reconstruction of Taenia ovis oncospheres from serial sections

International Journal for Parasitology, 2010

Research paper thumbnail of Ultrastructure of spermatogenesis of the anoplocephalid cestode Gallegoides arfaai (Mobedi et Ghadirian, 1977) Tenora et Mas-Coma, 1978

Research paper thumbnail of Fertilization in the cestode Gallegoides arfaai (Mobedi et Ghadirian, 1977) Tenora et Mas-Coma, 1978 (Cyclophyllidea, Anoplocephalidae)

Research paper thumbnail of Ultrastructure and cytochemistry of vitellogenesis in Wenyonia virilis Woodland, 1923 (Cestoda, Caryophyllidea)

Acta Parasitologica, 2009

Research paper thumbnail of Post-embryonic development and ultrastructural characteristics of the polycephalic larva of Taenia parva Baer, 1926 (Cyclophyllidea, Taeniidae)

Acta Parasitologica, 2007

Research paper thumbnail of Advanced stages of embryonic development and cotylocidial morphogenesis in the intrauterine eggs of Aspidogaster limacoides Diesing, 1835 (Aspidogastrea), with comments on their phylogenetic implications

Acta Parasitologica, 2012