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Volume 44 (1993)
- Issue 4 Pages 4-
- Issue 3 Pages 179-
- Issue 2 Pages 65-
- Issue 1 Pages 1-
Volume 44, Issue 2
Displaying 1-11 of 11 articles from this issue
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Article type: Cover
1993 Volume 44 Issue 2 Pages Cover6-
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
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Christopher F. CURTISArticle type: Article
1993 Volume 44 Issue 2 Pages 65-68
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
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Minoru NAKAO, Kenji MIYAMOTOArticle type: Article
1993 Volume 44 Issue 2 Pages 69-84
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
JOURNAL FREE ACCESSTo evaluate the reservoir competence of feral rodents for the Lyme disease spirochete Borrelia burgdorferi transmitted by the ixodid tick Ixodes persulcatus, 523 rodents of 4 species were captured from 2 endemic sites in Furano and Nemuro, Hokkaido, during 1991. A total of 581 larvae and 144 nymphs of I. persulcatus were collected from these rodent specimens. The principal host of I. persulcatus immatures was the wood mouse Apodemus speciosus ainu. The immature ticks collected were examined for spirochetal infections by culturing their internal tissues in BSK medium. The spirochetes were isolated from 35 (20.6%) of 170 I. persulcatus larvae derived from 53 A. speciosus ainu in Furano, and 82 (69.5%) of 118 I. persulcatus larvae derived from 26 A. speciosus ainu in Nemuro. We also demonstrated the transstadial infections in I. persulcatus nymphs that had fed as larvae on A. speciosus ainu in Nemuro. Xenodiagnosis indicated that the mice retained the long-term infectivity for the vector ticks. The laboratory experiment was conducted to determine whether the infected nymphs of I. persulcatus transmit spirochetes to the uninfected A. speciosus ainu. The mice readily became infected by nymphal feeding and showed no morbidity during the infection. These data clearly indicate that A. speciosus ainu is a suitable reservoir host for B. burgdorferi transmitted by I. persulcatus in Hokkaido.View full abstractDownload PDF (2227K) -
Minoru BABAArticle type: Article
1993 Volume 44 Issue 2 Pages 85-90
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
JOURNAL FREE ACCESSSimulium quinquestriatum (Shiraki), one of the multivoltine blackfly species in Japan, was studied with regard to its oviposition site preference, number of larval instars, and duration for development of aquatic stages. This species laid eggs on leaf blades trailing in the water, and also on splashed rock surfaces. Laboratory rearings at 14℃ showed that median periods (in days) for eggs, larvae and pupae were 6.5-7.5,33-53,and 6,respectively. The considerable difference noted in the larval period among rearing lots was attributed to the difference in food amount. Size-frequency distribution of larval head capsules suggested nine instar stages both in the laboratory and in the field.View full abstractDownload PDF (527K) -
Mamoru TAKAHASHI, Hiroshi URAKAMI, Michisato MURATA, Hitoko MISUMI, Os ...Article type: Article
1993 Volume 44 Issue 2 Pages 91-96
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
JOURNAL FREE ACCESSA high dose of 6,400μg minocycline was initially injected subcutaneously into the back of the neck of a ddY mouse. Then 3,400μg were given every 12hr for 4 days. After 34hr from the first injection with minocycline Rickettsia tsutsugamushi (Rt) infected unfed larvae of L. fletcheri were attached to the mouse, and it was successful in killing Rt in mites. Out of 80 unfed larvae transferred into the ear lobe of the mouse with a fine paint brush under a stereomicroscope, 50 engorged larvae were recovered. Out of the 50,23 larvae developed into adults. Among them, 8 females (Parent generation) laid and average of 122.3 eggs (F_1), the number of laid eggs ranging from 34 to 230. The number of laid eggs was almost similar to the 133.5 eggs per Rt infected female, but less than the 170.9 eggs per Rt uninfected female. The females of L. fletcheri in the Rt infected colony produced only females, but uninfected females produced different sexes of progeny, i.e., females alone, males alone or both sexes in varied proportions by individual females. All of the F_1 larvae from the above mentioned P generation developed into only females, and males were found in F_2 for the first time in this infected colony after killing Rt at the P generation. The ratio of male to female was 297 : 4 (or 74.3 : 1). These data suggest that the presence of Rt in the ovary has a restraining effect on the birth of male progeny in the infected colony, because the sex of F_1 was determined to be female even though Rt was killed in the larval stage of the Parent generation.View full abstractDownload PDF (633K) -
Kenji MIYAMOTOArticle type: Article
1993 Volume 44 Issue 2 Pages 97-99
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
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[in Japanese]Article type: Article
1993 Volume 44 Issue 2 Pages 100-
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
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Tetsushi KIKUCHI, Takeshi SUZUKI, Masayuki YASUNOArticle type: Article
1993 Volume 44 Issue 2 Pages 101-103
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
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[in Japanese]Article type: Article
1993 Volume 44 Issue 2 Pages 104-
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
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Satoshi SHINONAGA, Hideyuki MITSUIArticle type: Article
1993 Volume 44 Issue 2 Pages 105-106
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
JOURNAL FREE ACCESSThe larvae of Muscina angustifrons (Loew) were bred from fungi collected in a forest of Tokorozawa City, Saitama Prefecture. It is supposed that the fungi are one of the breeding sources of this species in natural environment. The 3rd stage larvae are characterized by the size of the anal plate which distinguishes M. angustifrons from its allied species M. stabulans.View full abstractDownload PDF (237K) -
Kozo FUJISAKI, Soichi IMAI, Hideo NIGI, Satoshi SHINONAGAArticle type: Article
1993 Volume 44 Issue 2 Pages 107-108
Published: June 15, 1993
Released on J-STAGE: August 23, 2016
JOURNAL FREE ACCESSFive females of a deer ked Lipoptena fortisetosa, de-alate form, were collected from a dead individual of the Japanese deer Cervus nippon nippon in April, 1990,in Kitatama-gun, Tokyo, Japan. This may be the first record of this species from Tokyo. Two males and two females of L. fortisetosa were collected from the Japanese deer captured in June, 1985,in Kinkazan Park, Miyagi, Japan.View full abstractDownload PDF (183K)
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