Volume 8, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



At the Shinhama heronry and nearby Minamigyotoku village near Tokyo, Japan, in 1953, , the major vector of Japanese encephalitis virus in Japan, entered traps baited with Black-crowned Night Herons in numbers 3 to 15 times greater than traps containing egrets or chickens; Blue Magpies, Tree Sparrows, Dusky Thrushes, and Grey Starlings failed to attract significant numbers. In 1956, at two rural and one urban location near Tokyo, pigs attracted and were bitten by many more than BCNH or man. were found in traps as high as 50 feet above ground at the Sagiyama heronry. The behavior of the vector mosquito explained in part the different incidences of virus infection among bird species, the high incidence of swine infection in nature, and infection of nestling birds high in trees at Sagiyama. Whatever animal mechanism exists for attracting , it persisted in traps for 1 to 3 days after removal of the animal.

Other mosquitoes behaved differently from frequently entered traps with all seven species of birds and was attracted to BCNH in traps more than to pigs. was found in significant numbers only in pig-baited traps in rural areas. Other species were recovered only in small numbers.

Microhabitats affected entry of mosquitoes into traps and necessitated study of multiple trap sites with duplicate traps. On one occasion collections were influenced by factors related to the individual trap and independent of trap design or location. These studies emphasized that predictions of virus ecology from knowledge of mosquito behavior alone may be erroneous.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error