Nucleopolyhedrovirus (NPV) was tested for vertical transmission in the silkworm, Bombyx mori. Fifth instar larvae were exposed to four different dosages of BmNPV (830, 1300, 1800, and 2000OBs/larva) and a dosage of about 2000OBs/larva was found suitable for obtaining infected adults. Histopathological studies revealed the infection in susceptible tissues and organs initially, and at later stage...

The first laboratory confirmed case in Kerala was reported Thiruvananthapuram, on 8th July 2021. Since then, 83 ZIKV positive cases have been from Kerala, with majority of Thiruvananthapuram Municipal Corporation (TMC) area. Entomological surveillance carried out 19 wards TMC including 9 micro containment wards. Three species Aedes (Stegomyia) mosquitoes-Ae.aegypti, Ae.albopictus and Ae.vittatu...

A deterministic SEIR model of rift valley fever (RVF) with climate change parameters was considered to compute the basic reproduction number ℛ 0 and investigate the impact of temperature and precipitation on ℛ 0. To study the effect of model parameters to ℛ 0, sensitivity and elasticity analysis of ℛ 0 were performed. When temperature and precipitation effects are not considered, ℛ 0 is more se...

A natural population of Psorophora ferox (Humbold, 1820) infected with the microsporidium Amblyospora ferocis Garcia et Becnel, 1994 was sampled weekly during a seven-month survey in Punta Lara, Buenos Aires Province, Argentina. The sequence of development of A. ferocis in larvae of P. ferox leading to the formation of meiospores followed the developmental pathway previously reported for variou...

OBJECTIVE To detect the presence of dengue virus in larval forms of Aedes aegypti and to associate vector presence with rainfall and incidence of disease. METHODS Eighteen households were randomly selected for egg collection in a neighborhood of the city of Boa Vista, Roraima, in Northern Brazil. Two oviposition traps were installed per home, and removed after one week. This was repeated on a...