|
|
Parous and nulliparous female detection in blood-sucking nematocera insects
Mračková, Marie ; Votýpka, Jan (advisor) ; Král, David (referee)
Nematocerous insects belong to the order Diptera, one of the largest and worldwide spread groups of insects. Haematophagous species act not only as tormentors, but also as vectors of various pathogens. The first section of this thesis reviews about insetct's reproductive systems, multiple blood-feeding, autogeny and development of ova; the information which are necessary for the transmission understanding. The principal topic of the thesis is reviewing methods for distinguishing parous and nulliparous females, which are commonly used for four Nematoceran groups: mosquitoes (Culidicade), black flies (Simuliidae), sand flies (Phlebotominae) and biting midges (Ceratopogonidae, the genus Culicoides). The section is focused mainly on family Culicidae, because the methods used for mosquitoes were the groundwork for developing methods suitable for the other groups. Some of the procedures, for example counting folicular dilatations or assessing the condition of tracheoles in the ovaries, are used for most of the studied groups; others, like pigmentation of the abdominal wall in the genus Culicoides, can be used only for one group. Knowledge of the female parity is very important for epidemiological and ecological studies, because only parous females, previously blood-fed on infected hosts, can transmit...
|
|
| |
|
|
Autogeny by phlebotomine sandflies
Pavlasová, Michaela ; Votýpka, Jan (advisor) ; Sádlová, Jovana (referee)
1 Abstract In haematophagous insect autogeny means an eggs development and ability to set first egg batch without previous blood-feeding on a host. Autogeny developed in several groups of invertebrates mainly order Diptera and more rarely orders Heteroptera and Acari. It occurs mostly as an alternative possibility of development in case of unsuitable conditions or absence of hosts. This thesis includes present findings about autogeny among subfamily Phlebotominae and families Culicidae, Simuliidae, Ceratopogonidae and Tabanidae. The thesis focuses on factors influencing autogeny such as nutrition during larval development, geographic and genetic factors, temperature and photoperiodic aspects. The thesis is targeted mostly on sandflies, important vectors of many pathogens, and on influence of autogeny on its vectorial potential. Key words: autogeny, ovarian development, Phlebotomus, Culicidae, Simuliidae, Ceratopogonidae, Tabanidae
|
|
|
Symbiotic bacteria of the genus Wolbachia in sand flies and mosquitoes.
Rehbergerová, Markéta ; Dvořák, Vít (advisor) ; Jančářová, Magdaléna (referee)
Bacteria of the genus Wolbachia (Proteobacteria, Rickettsiales, Rickettsiaceae) are maternally inherited intracellular symbionts of many species of arthropods (Arthropoda) and filarial nematodes (Nematoda, Secernentea). Due to the ability of Wolbachia to induce reproductive anomalies in their hosts and to reduce their infection by pathogenic organisms and viruses, they are profoundly studied. This bachelor thesis is a summary of available information regarding interactions of Wolbachia with mosquitoes (Diptera, Culicidae) and sand flies (Diptera, Psychodidae, Phlebotominae), vectors of many important infectious pathogens, and possibilities of their use in the control of pathogen transmission. Key words: Wolbachia, Phlebotominae, Culicidae, vector-borne diseases, symbiosis, vector control method
|
|
|
Parous and nulliparous female detection in blood-sucking nematocera insects
Mračková, Marie ; Votýpka, Jan (advisor) ; Král, David (referee)
Nematocerous insects belong to the order Diptera, one of the largest and worldwide spread groups of insects. Haematophagous species act not only as tormentors, but also as vectors of various pathogens. The first section of this thesis reviews about insetct's reproductive systems, multiple blood-feeding, autogeny and development of ova; the information which are necessary for the transmission understanding. The principal topic of the thesis is reviewing methods for distinguishing parous and nulliparous females, which are commonly used for four Nematoceran groups: mosquitoes (Culidicade), black flies (Simuliidae), sand flies (Phlebotominae) and biting midges (Ceratopogonidae, the genus Culicoides). The section is focused mainly on family Culicidae, because the methods used for mosquitoes were the groundwork for developing methods suitable for the other groups. Some of the procedures, for example counting folicular dilatations or assessing the condition of tracheoles in the ovaries, are used for most of the studied groups; others, like pigmentation of the abdominal wall in the genus Culicoides, can be used only for one group. Knowledge of the female parity is very important for epidemiological and ecological studies, because only parous females, previously blood-fed on infected hosts, can transmit...
|
|
| |
|
|
Autogeny by phlebotomine sandflies
Pavlasová, Michaela ; Votýpka, Jan (advisor) ; Sádlová, Jovana (referee)
1 Abstract In haematophagous insect autogeny means an eggs development and ability to set first egg batch without previous blood-feeding on a host. Autogeny developed in several groups of invertebrates mainly order Diptera and more rarely orders Heteroptera and Acari. It occurs mostly as an alternative possibility of development in case of unsuitable conditions or absence of hosts. This thesis includes present findings about autogeny among subfamily Phlebotominae and families Culicidae, Simuliidae, Ceratopogonidae and Tabanidae. The thesis focuses on factors influencing autogeny such as nutrition during larval development, geographic and genetic factors, temperature and photoperiodic aspects. The thesis is targeted mostly on sandflies, important vectors of many pathogens, and on influence of autogeny on its vectorial potential. Key words: autogeny, ovarian development, Phlebotomus, Culicidae, Simuliidae, Ceratopogonidae, Tabanidae
|
guest ::
