The blood feeding habit, especially among opportunist feeders such as tabanids and Stomoxys is known to result in transmission of diseases for which the vectors are not the obligate or alternate hosts. Thus, mechanical transmission of trypanosomes such as T. vivax can occur in cattle herds outside tsetse fly areas where tabanids are actively feeding. In the case of Yaws, mechanical transmission...

Serological data accumulated during the past decade indicated that a variety of feral and domestic animals of the Delaware-Maryland-Virginia (DelMarVa) Peninsula were infected with Jamestown Canyon (JC) and/or Keystone (KEY) viruses (Bunyaviridae, California serogroup). Neutralizing (N) antibody to JC virus was most prevalent in white-tailed deer, sika deer, cottontail rabbits and horses. KEY v...

BACKGROUND & OBJECTIVES Dengue is currently one of the most important arthropod-borne diseases and may be caused by four different dengue virus serotypes (DENV-1 to DENV-4), transmitted mainly by Aedes aegypti (Diptera: Culicidae) mosquitoes. With the lack of a dengue vaccine, vector control strategies constitute a crucial mode to prevent or reduce disease transmission. In this context, DENV de...

Aedes triseriatus mosquitoes were orally infected with two different California serogroup bunyaviruses (La Crosse and snowshoe hare viruses) and high frequency reassortment occurred in these mosquitoes. Increased viral replication and subsequent gene segment reassortment was noted in the ovaries of mosquitoes that had ingested multiple blood-meals. To determine whether newly generated reassorta...

The whitefly Bemisia tabaci is the only vector of the tomato yellow leaf curl geminivirus (TYLCV). The insect transmits the virus in a persistent-circulative manner. TYLCV DNA was detected by polymerase chain reaction and by Southern blot hybridization in progeny (eggs, first and second instars, adults) of single viruliferous whiteflies that developed on eggplant or on cotton (two TYLCV nonhost...

For more than one century, Aedes species are supposed to be a reservoir in dengue, yellow fever, rift valley fever and west nile viruses transmission. In this article, we study an infinite dimension ordinary differential equations system that models arbovirus vertical transmission \textit{Aedes} mosquito. Relying of the positive semigroup theory, show model is well-posed compute threshold param...

The utility of inter simple sequence repeat-PCR (ISSR-PCR) assay in the genetic characterisation and elucidation of the phylogenetic relationship of different microsporidian isolates infecting tropical tasar silkworm, Antheraea mylitta Drury, is demonstrated. A total of 22 different microsporidians collected from the diseased tasar silkworms from Jharkhand state of India were analysed using mor...

The many other insects with a restricted diet, the citrus psyllid Diaphorina citri Kuwayama, the vector Causing Which agent of the HLB , the bacterium Candidatus spp Liberibacter., is intimately Associated with symbiotic microorganisms. These mutualistic symbionts play a key role on Their host nutritional ecology, and are vertically Transmitted to the progeny. However, Despite The role symbiont...

A 2-year field study was conducted in southern Saratoga County, New York, to determine which species of the Aedes communis group mosquitoes were potential vectors of Jamestown Canyon (JC) virus. A total of 23,890 mosquitoes (890 pools) were processed for virus isolation in 1988-89, yielding 17 JC virus isolates from Ae. provocans and one isolate each from Ae. communis, Ae. intrudens and Ae. pun...