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P F Boreham

Publications and source records attributed to P F Boreham.

At least 109 records · Page 6Linked to original sources
PubMed1973

Host-feeding patterns and behaviour of 4 Culex species in an endemic area of Japanese encephalitis.

Studies were made on the host-feeding patterns and behaviour of 4 Culex species in China (Province of Taiwan) to further assess their importance as vectors of Japanese encephalitis. A relatively unbiased, non-attractant technique (vacuum sweep-net) was used for collecting mosquitos resting outdoors on rural premises; blood meals from engorged specimens were identified by precipitin tests. Additional information was obtained by analysing data from related studies. Precipitin-test results indicated that C. annulus, C. tritaeniorhynchus, and C. fuscocephalus feed principally on mammals, the first species mainly on swine and the latter two largely on bovine hosts. Mosquito forage ratios suggested that the apparent preference of C. annulus for swine over bovine hosts might be a function of host density. C. annulus was found to be zoophilic, exophilic, and exophagic; however, in view of its abundance during the JE epidemic season, contact with human hosts may reach a significant level, even indoors. The other 3 species of Culex were considered to be of lesser importance as JE vectors during the 1971 epidemic season because of their host-feeding patterns and/or population densities.

Animals↗
PubMed1973

Prevalence of mixed blood meals and double feeding in a malaria vector (Anopheles sacharovi Favre).

A study was undertaken in a Greek village during 1970 to determine the degree of mixed feeding in a population of Anopheles sacharovi Favre. Exhaustive precipitin testing of 1 025 bloodmeals from 5 sites representing 3 different biotopes revealed that 91 (8.9%) of the 1 021 positive meals contained blood from 2 serologically distinct hosts. In a routine survey in 1971, when the testing was not as exhaustive, mixed meals were detected in only 2 (0.1%) of 1 798 smears tested. In the 1970 study, no mixed meals were found in pit-shelters, suggesting that a mosquito interrupted while feeding out of doors tends to move to an indoor biotope to complete its meal. A portion of the multiple meals -i.e., those completed on the same host species-could not be detected by the precipitin test. The frequencies of these "cryptic" multiple meals were calculated for the three main biotopes studied. The human blood index derived from these tests suggests that, in the absence of insecticidal spraying for 10 years, the host selection pattern of the mosquito had reverted to that found before the malaria eradication programme in Greece commenced.

Animals↗