Biomedical subjects
Publications and source records attributed to H Hoogstraal.
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Haemaphysalis (Rhipistoma) eupleres Hoogstraal, Kohls and Trapido 1965, was described and partially illustrated from a single damaged female from the falanouc, or small-toothed mongoose, Eupleres sp., from an unstated locality in Madagascar. Data are here presented for two collections (9 males, 17 females) from two localities in Tamatave Province, one from E. goudotii Doyère, the other from an unstated host. The male is described and illustrated; a complete female is illustrated.
Haemaphysalis (Allophysalis) danieli sp. n. is described from a female taken from alpine vegetation in Swat, Pakistan. Fifty-one nymphal and larval ticks tentatively associated with this taxon are from hamsters, field mice, voles, and marmots (Rodentia), Cricetulus migratorius, Apodemus flavicollis, alticola roylei, and Marmota caudata, and from pikas (Lagomorpha), Ochotona roylei, in Gilgit and Hazara districts of Pakistan and in Badakhashan Province of Afghanistan. Collecting localities are in the western Himalayan mountain complex between 2,310 and 4,000 m altitude and between 35degrees08' and 36degrees23' N and 71degrees51' and 74degrees02' E. This species is most closely related to the mountain-inhabiting H. (A9Y pospelovashtromae Hoogstraal of southern USSR and Mongolia and H. (A.) garhwalensis Dhanda and Bhat of northern India and Nepal.
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In 1967, Vermeil and Marguet described Ornithodoros coniceps maritimus from larvae reared from larvae taken from marine birds on Dumet Island (Atlantic Ocean), Basse Bretagne, France. We collected O. (A.) coniceps Canestrini, 1890, from the type locality (Venice, Italy) and determined that the taxons coniceps and maritimus each require full species status. We selected a lectotype and paralectotypes for the taxon maritimus from the original Dumet Island material. The larva of maritimus is redescribed and the nymph, male, and female are described for the first time. Collection data are recorded from Dumet and other islands off France, Aegimures Islands off Tunisia, Puffin Island off northern Wales, and Great Saltee Island off Ireland. This tick infests nesting colonies of the common tern, roseate tern, sandwich tern, herring gull (northern and Mediterranean races), common cormorant, shag, razorbill, common murre, black-legged kittiwake, and probably other marine birds nesting nearby. Adults and nymphs (tentatively identified as maritimus but lacking associated larvae for full confirmation) were taken near nests of the little egret in Lake Tunis, Tunisia. Soldado virus was isolated from Puffin Island tick samples and a Soldado-like virus from Great Saltee Island tick samples. An experimental study of West Nile virus in the Tunisian tick population is reviewed. The birds species associated with maritimus in each collecting locality, and their nesting and resting habits and migration patterns in relation to tick and arbovirus survival and distribution, will be reported in the following paper in this series.
Three strains of Soldado (SOL) virus (Hughes serogroup) were isolated from nymphal and adult Ornithodoros (Alectorobius) maritimus Vermeil et Marguet collected in and near nests of the Herring Gull, Larus a. argentatus Pontoppidan, on Puffin Island, northern Wales. Reciprocal complement fixation (CF) titration results demonstrated recovered virus strains to be SOL virus and antigenically distinct from other Hughes serogroup members. All isolates killed mice and guinea pigs, and 1-2 day old domestic chicks when inoculated intracerebrally.
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In the summer of 1973, about 5,000 pairs of adult Sooty Terns abandoned a specific part of their breeding grounds on Bird Island in the Seychelles. Incubated eggs and newly hatched chicks were left unattended and the area was not reoccupied in 1974. Numerous Ornithodoros (Alectorobius) capensis occurred in the deserted part in both years, but few or none in the area where bird breeding was normal. Persons visiting the deserted area were bitten by many ticks and experienced severe pruritus persisting for several days. In 1973 and 1974, Soldado (SOL) virus (Hughes serogroup) was isolated from the ticks taken on Bird Island from the ground and from sick and not visibly sick chicks of the Sooty Tern, and also from nests of the Blue-faced Booby on Des Noeufs Island. When ticks from the ground and from Sooty Tern chicks were fed on domestic chicks, they transmitted SOL virus and caused the death of their hosts. Soldado virus was previously known only from O. (A.) capensis-group ticks infesting marine bird colonies on islands off Trinidad and in a lake in Ethiopia. We have also isolated SOL virus from another species of the subgenus Alectorobius from Wales, Great Britain. Marine bird migrations undoubtedly account for the remarkably extensive distribution of SOL virus. The role of migration in the mechanisms and dynamics of tick and virus distribution, and the comparative growth cycles of Hughes serogroup viruses in Ornithodoros ticks, remain to be determined for a better epidemiological understanding of this agent.
To provide background data for an investigation of biological interrelationships between Argas (Persicargas) robertsi Hoogstraal, Kaiser and Kohls and 3 arboviruses (Kao Shuan, Pathum Thani, and Nyamanini) isolated from this tick species, domestic pigeons were used as experimental hosts to study the life cycle of population samples from Taiwan (TA), Thailand (TH), Indonesia (IN), Sri Lanka (SR), and Australia (AU). The life cycle (at 28-30 degrees C and 75% RH) required 2-10 months. Biological data for the different population samples varied possibly owing to atavistic retention of seasonally adjusted properties associated with diapause and the migratory habits or breeding cycles of wild hosts, or to different rearing times of the various samples. There were 2-4 nymphal instars in SR and AU samples and 2-5 instars in TA, TH, and IN samples. Nymphs and adults fed within a few days after molting or oviposition and usually emitted coxal fluid while feeding. Males molted from earlier nymphal instars than females.
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