[The behavior of the causative agents of blood and transmissible infections during the preparatory period for a change in host. A review].
The author has reviewed the available literature on the changes in the physiological state and behaviour of hosts of vector-borne diseases agents during the before-host-changing and during host-changing periods. For vertebrates the effect of the agent is reflected in the rise of body temperature, reduction of locomotor activity and protective reactions, thrombocytopenia and vasodilation, accompanied by periodical concentration of the agent in the peripheral part of the vascular system. All this provides a successful search for a host, a source of infection, and obtaining the agent by blood-sucking vector. For arthropods the effect of the agent is reflected in changes in the vector behaviour as during the host-searching period so in an attempt for bloodsucking. Alimentary tract obstruction with an agent blocking, phagoreceptors block (eructation type of infection), inhibition of saliva ferments activity (saliva type of transmission) result in the prolongation of the feeding period and rise of agent hit probability. The last three types of effect on the feeding mechanism increase the possibility of death of an infected individual and decrease the chance of progeny preservation.
Alekseev
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D000222:Adaptation, Physiological; D000818:Animals; D001831:Body Temperature; D003141:Communicable Diseases / Q000469:parasitology* / Q000503:physiopathology / Q000635:transmission; D005247:Feeding Behavior / Q000502:physiology; D006402:Hematologic Diseases / Q000469:parasitology* / Q000503:physiopathology / Q000635:transmission; D006790:Host-Parasite Interactions; D007303:Insect Vectors / Q000502:physiology; D010272:Parasitic Diseases / Q000469:parasitology* / Q000503:physiopathology / Q000635:transmission; D018805:Sepsis / Q000469:parasitology / Q000503:physiopathology / Q000635:transmission; D014766:Viremia / Q000469:parasitology / Q000503:physiopathology / Q000635:transmission
Povedenie vozbuditeleĭ krovianykh i transmissivnykh infektsiĭ v periode podgotovki k smene khoziaina. Obzor.