Université de Neuchâtel

Respiratory physiology and anthropophilic behavioural traits of the main malaria vector "Anopheles gambiae" Giles (Diptera: Culicidae)

Frei, Jérôme ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Anopheles gambiae Giles (An. gambiae) is the main vector of malaria. To fulfil metabolic demand An. gambiae is particularly dependent on blood feeding which is an important driving force of its strong vectorial capacity. It is therefore important to better understand how its metabolism scales with body size and, as an ectotherm, evaluate the thermal sensitivity of its...

Université de Neuchâtel

The behaviour of the tsetse fly Glossina pallidipes (Diptera, Glossinidae) : from host seeking to biting

Chappuis, Charles ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

Tsetse flies are major vectors of African trypanosomes causing sleeping sickness in humans and nagana in cattle. These diseases are substantial burdens on human health and prosperity. One way to break the trypanosomes life-cycle is the control of tsetse populations using visual odour-baited trapping devices. A better understanding of how tsetse use visual and chemical cues to locate hosts could...

Université de Neuchâtel

Aspects of the sensory physiology of the pollination of "Petunia axillaris" and mating in moth pests

Gurba, Alexandre ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

Compounds produced by plants have an important impact on many aspects of the biology of insects from whom plants are a particularly important source of food. As an adult, insects use chemical messages to identify and locate a suitable food source. The specificity of the host plant relationship is also crucial for healthy development of larvae. The choice of oviposition site is determinant for the...

Université de Neuchâtel

Tsetse fly responses to volatile plant compounds

Joris, Caroline ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012.

Tsetse flies (Diptera, Glossinidae) constitute 31 species and subspecies divided into three subgenera. They are currently confined in sub-Saharan Africa and occupy three preferred habitats: savannah, riverine zones and forest. Both sexes are strictly haematophagous and can transmit during their blood meal trypanosomiasis which causes sleeping sickness in humans and Nagana in animals. It is...

Université de Neuchâtel

Development of tools to control Palpalis group tsetse flies in West Africa

Rayaisse, Jean-Baptiste ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2011.

Tsetse flies are vectors of Human and Animal African Trypanosomoses (HAT or sleeping sickness, and AAT or nagana, respectively). Tsetse fly traps and two-dimensional targets, when impregnated with insecticides, have constituted a central component of tsetse control campaigns in many countries in Africa. In order to make these tools more efficient and affordable, studies were undertaken to find...

Université de Neuchâtel

Les phéromones sexuelles : utilisées comme moyen de lutte, évaluation de leur efficacité et mesure de leur impact physiologique sur les vers de la grappe

Briand, Françoise ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2009 ; Th. 2094.

Les vers de la grappe Eupoecilia ambiguella Hb. et Lobesia botrana Den. et Schiff. (Lepidoptera, Tortricidae) sont les principaux ravageurs des vignobles européens. Les larves engendrent des dégâts directs en se nourrissant des organes reproducteurs de la plante, et indirects en favorisant l'infection des baies de raisins par des pathogènes saprophytes. Cela entraîne des...

Université de Neuchâtel

Molecular functional characterization of appetence maturation and its nutrient-dependent control in the African malaria mosquito “Anopheles gambiae”

Arsic, Dany ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008 ; Th.2021.

Anopheles gambiae mosquitoes are the main vector of human malaria in sub-Saharan Africa. The frequent blood meals taken by female An. gambiae increase the transmission of Plasmodium blood parasites. A better understanding of the regulation of host-seeking and feeding behaviors in this mosquito is a prerequisite for further efforts to cut malaria transmission. Our first aim was to portray better...