National Repository of Grey Literature 16 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
The role of hippoboscids in avian trypanosomes transmission
Santolíková, Anežka ; Svobodová, Milena (advisor) ; Dvořák, Vít (referee)
The aim of this thesis was to map the presence of avian hippoboscids in Czechia, clarify which lineages of avian trypanosomes are transmitted by them, and to test vector specificity of the trypanosomes that were isolated from louse flies earlier. In the years 2017 - 2018 we found 7 species of louse flies, namely Ornithomya avicularia (91), O. biloba (267), O. fringillina (45), Ornithoica turdi (6), Stenepteryx hirundinis (1) and Ornithophila metallica (1). The specificity of O. biloba and S. hirundinis toward Hirudinidae was confirmed. The other louse fly species were found on both migrant and resident birds. The phylogenetic analysis of gene for cytochrome c oxidase I which contained a newly characterised species O. metallica revealed that it is related to O. turdi. Avian trypanosomes were present in the following species: O. biloba (prevalence 20 %), O. avicularia (8 %), a O. fringillina (4 %). All trypanosome sequences from hippoboscids belonged to the avian trypanosome group corvi-culicavium. Phylogenetic analysis of trypanosome sequences confirmed the presence of five lineages of avian trypanosomes. Four trypanosome sequences from birds formed two new basal clades. Most of the trypanosome sequences from hippoboscids formed a sister group to the previously described lineages. The vector specificity of...
Avian haemosporidia: Prevalence, host specificity, vectors
Janíčková, Lada ; Svobodová, Milena (advisor) ; Kvičerová, Jana (referee)
Haemosporidia are a group of protozoan parasites that shifts between vertebrates and insect vectors during a complicated life cycle. In this thesis I have focused on two of the genera infecting birds, Plasmodium and Haemoproteus (sometimes together referred to as avian malaria) in terms of their host specificity and prevalence in avian hosts and vectors. These globally distributed genera have different vectors, and although they both attack bird hosts, they have different host specificities. While the genus Plasmodium is rather generalistic, the genus Haemoproteus is more host specific. Key words: host specificity, prevalence, bird Plasmodium, Haemoproteus, vector, bird host
Mosquitoes as vectors of avian trypanosomes
Fialová, Magdaléna ; Svobodová, Milena (advisor) ; Šlapeta, Jan (referee)
Avian trypanosomes are quite common parasites of birds, although knowledge of their life cycles and vectors is still insufficient. There are some insect families which serve as vectors of these parasites: blackflies (Simuliidae), hippoboscid flies (Hippobosciade), mosquitoes (Culicidae), biting midges (Ceratopognidae) and sandflies (Psychodidae). In this study we have been focused on mosquitoes. We have examined prevalence of avian trypanosomes at wild-caught mosquitoes from genus Culex. Furthermore we have studied experimental transmission of avian trypanosomes from mosquitoes to birds. Mosquitoes were caught with CDC traps in three different localities during seasons 2017 and 2018. We caught 956 (125 pools) mosquitoes belonging to genus Culex, from whom 14,4 % pools were positive for avian trypanosomes. MIR (Minimal Infectiom Rate) fluctuated between 0 % to 8,3 % in studied months (May-August). The most frequently identified parasite was T.culicavium, detected in 13,6% (n=17) pooles. Parasites belonging to T. avium group were detected only in 0,8 % (n=1), it was T. thomasbancrofti. In our experimental part we have been focused on development of T. thomasbancrofti and Trypanosoma sp. in laboratory bred mosquitoes Cx. quinquefasciatus and Cx. molestus and on their experimental transmission to...
Haemoproteus in passerines: infection dynamics at the individual level
Chalupová, Barbora ; Svobodová, Milena (advisor) ; Hořák, David (referee)
The genus Haemoproteus is worldwide distributed parasitic protist, which belongs to the phylum Apicomplexa. This blood parasite has dixenous life cycle and he is occurs in the bird's blood and in invertebrate vectors. Genus Haemoproteus is transmitted by blood-sucking vectors, biting midges (Ceratopogonidae) and hippoboscid flies (Hippoboscidae). Vectors are final hosts of the genus Haemoproteus and the sexual process takes place in these vectors. Birds are intermediate hosts, in which representatives of the genus Haemoproteus spend most of their lives. In this bachelor thesis I focused on the influence of the genus Haemoproteus on birds and I focus on the time, when the bird gets infected by Haemoproteus in his life. Key words: Haemoproteus, birds, infection, life cycle, host, Ceratopogonidae, Hippoboscidae
Vectors of avian trypanosomes and prevalence in Passerines
Santolíková, Anežka ; Svobodová, Milena (advisor) ; Vinkler, Michal (referee)
The aim of this bachelor thesis is to summarize the knowledge about the development of avian trypanosomes in the vector, and about their prevalence in avian hosts. Trypanosomes are dixenous parasitic protists. They live in the bloodstream of vertebrates and in invertebrate vectors. Replication of avian trypanosomes occurs mainly in the vector. Promastigote, epimastigote and metacyclic trypomastigote stages were observed in the vector already in the 1950s. In avian blood, bloodstream trypomastigotes occur. The vectors of avian trypanosomes are members of families Ceratopogonidae, Culicidae, Simuliidae, Hippoboscidae and Dermanyssidae. Although replication of trypanosomes has been seen in the vector, observations of division in birds are scarse. Results concerning prevalence of trypanosomes in birds considerably differ between different studies. This is mostly due to differences in methods used to detect trypanosomes from avian blood. Whereas detection from blood smears was used in the past, nowadays, more sensitive methods have been introduced, such as PCR or cultivation of trypanosome.
Mosquitoes as hosts and vectors of protozoa transmitted to birds
Fialová, Magdaléna ; Svobodová, Milena (advisor) ; Munclinger, Pavel (referee)
Mosquitoes belong to significant representatives of inscet which are particularly studied due to their ability to transmit pathogens (viruses, bacteria, protozoa, worms) in many cases causing serious illnesses. The hosts of these pathogens can be various animals including birds. In this study I have focused on protozoa (especially Plasmodium and Trypanosoma) transmitted by a mosquito. Concerning trypanosomes the mosquito is one of several possible vectors and up to now there have been named two trypanosomes transmitted by birds, namely Trypanosoma culicavium and Trypanosoma thomasbancrofti. In the case of the genus Plasmodium the mosquito is the only vector and there are many more species of the genus Plasmodium, which mosquito transmits between birds. Key words: vector, mosquito, host, bird, Trypanosoma, Plasmodium, infection

National Repository of Grey Literature : 16 records found   1 - 10next  jump to record:
See also: similar author names
5 SVOBODOVÁ, Magdalena
5 SVOBODOVÁ, Magdaléna
29 SVOBODOVÁ, Markéta
33 SVOBODOVÁ, Martina
20 SVOBODOVÁ, Michaela
4 SVOBODOVÁ, Michala
10 SVOBODOVÁ, Monika
1 Svobodová, M.
1 Svobodová, Magda
5 Svobodová, Magdaléna
1 Svobodová, Mahulena
6 Svobodová, Marcela
1 Svobodová, Mariana
8 Svobodová, Marie
1 Svobodová, Marika
29 Svobodová, Markéta
2 Svobodová, Marta
33 Svobodová, Martina
1 Svobodová, Martina Bc.
20 Svobodová, Michaela
4 Svobodová, Michala
1 Svobodová, Miriam
2 Svobodová, Miroslava
10 Svobodová, Monika
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