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At least 19 recordsLinked to original sources
PubMed1975

Arbovirus studies in Angola: Serological survey for antibodies to arboviruses.

A serological survey was made comprising 4,590 human sera collected in 16 areas of Angola, in order to determine the distribution of arboviruses. The results obtained with the hemagglutination inhibition (HI) test have shown that the activity of the arboviruses is more prevalent in northern Angola, where a larger number of sera reacted in the HI test against group A and B arboviruses (7% and 32..6%, respectively). Several sera with HI reactions against Bunyamwera, group C, and Rift Valley fever viruses were also found.

Adolescent↗
PubMed1990

[Ticks of the Ixodidae family as reservoir of arboviruses in the Republic of Guinea. II. Arboviruses].

From 1978 to 1985, 96,167 Ixodidae family were collected, from which 79 strains of the following arboviruses were isolated, i.e. 4 Bhanja strains, 9 CHF-Congo, 20 Dugbe, 24 Jos (viruses ecologically related to ticks), 10 Abadina, 7 Bluetongue, 1 Bunyamwera, 1 Chikungunya, (related to ticks for the first time), 1 Kindia and 2 Forecariah (new viruses). The main sources for arbovirus isolation were ticks of the Amblyomma variegatum genus (78.5%) followed by ticks of the Boophilus (12.6%), Rhipicephalus (7.6%) and Haemaphysalis (1.3%) genera. According to experimental data obtained in the laboratory and in the field involvement of A. variegatum as reservoir host for Abadina virus was established. The seasonal dynamics characteristics of the propagation of this virus and its pathogenicity for cattle were also noticed. Serological surveys on cattle (i.e. on about 7000 sera) showed that Abadina, Bluetongue, CHF-Congo, Dugbe viruses spread more actively, with 24-35% positive sera. The rate of positive sera against Bhanja, Forecariah, Jos and RVF viruses did not exceed 0.9%. During the study period, the arboviruses isolated from ticks did not play any important epidemiological role in human pathology of the Republic of Guinea.

Africa, Western↗
PubMed1970

Studies on arboviruses in Egypt. II. Contribution of arboviruses to the aetiology of undiagnosed fever among children.

Acute blood samples from 120 children, attending the fever hospital in Alexandria and complaining of fever, were collected and examined for haemagglutination-inhibiting (HAI) and complement-fixing (CF) antibodies against the following arbovirus antigens; Sindbis, West Nile (WN), yellow fever, dengue 1, sandfly fever, Quaranfil, Chenuda and Nyamanini. Positive reactions in the acute sera were only detected against Sindbis (4.3%) and WN (4.3%) antigens. The convalescent sera obtained from 48 of these children showed a pronounced HAI titre against WN antigen in 14.6% of them. The same sera showed a lower titre against yellow fever antigen (Asibi strain) which is due to cross-reaction between the two viruses. None of the acute or the convalescent sera showed CF antibodies against Quaranfil, Chenuda or Nyamanini antigens. The convalescent sera were not tested against dengue type 1 antigen. It is suggested that of the known arboviruses in Egypt, WN is the most important from the public health point of view.

Adolescent↗
PubMed1979

Arboviruses in New York State: an attempt to determine the role of arboviruses in patients with viral encephalitis and meningitis.

In a reveiw of 2,963 patients with signs of infections of the central nervous system in New York State in 1966--1977, arboviruses were found to be the confirmed or presumptive etiologic agents in 60 patients. California encephalitis (CE) virus was the most common (44 patients), followed by Powassan (POW) virus (8), St. Louis encephalitis virus (7), and eastern equine encephalitis (EEE) virus (1). Most patients (47) were children. The incidence of encephalitis was higher in patients with arbovirus findings than in infections with any other of the common neurotropic viruses. The disease was fatal in two patients, one infected with POW virus, the other with EEE virus. Most patients with CE virus infections resided in suburban areas. All POW infections were contracted in six rural counties known for their recreational facilities.

Adolescent↗
PubMedDate not supplied

[Arboviruses and arbovirus infections in the forest steppe zone of Ukraine].

New active natural foci of the tick-borne encephalitis, West Nile, California serologic group (CSG) and Batai viruses have been identified as a result of comprehensive virologic and serologic investigations in the forest-steppe zone of Ukraine. These observations were confirmed by the results of these pathogens study and identification of the corresponding antigens in natural biological substrates and in the blood of ill people. Several human pathogenetic viruses, including Inko, Snow hoc hare with CSG and Crimean hemorrhagic fever were found for the first time in the forest-steppe zone. Viruses populations circulating there are heterogeneous according to their genetic properties. New data concerning their ecology were obtained. A close etiological relation between the acute seasonal febrile diseases and the above mentioned arboviruses was found. Arboviral infections from 23.6% of the total amount of spring-summer-autumn febrile diseases. The West Nile fever (53.1%) is the leading arboviral infection in the forest-steppe zone. A quarter of all arboviral infections is represented by tick-borne encephalitis. Diagnostic preparations have been made and the available methods of laboratory diagnostics of the arboviral infections have been improved.

Animals↗