Page 61 - PARVEEN, S
P. 61

DHAKA CITY, BANGLADESH.  Bang. J. Life               OF ESTERASE ISOZYMES IN DEVELOPMENTAL
             Sci., 2006, 18 (1), 69-78.                           STAGES OF  AEDES AEGYPTI (LINNAEUS)
                                                                  (DEPTERA: CULICIDAE) FROM DHAKA CITY.
             Intensive  survey was conducted to record the        Bang. J. Life Sci., 2008, 20 (2), 95-100.
             container breeding habitats of mosquitoes  in  the
             Dhaka  city at six selected areas from May to        Esterase isozyme patterns of  the  eggs,  larvae,
             October  2003  (number  arbitrarily as area 1-6). A   pupae,  females and males of  Aedes aegypti  were
             total of 6168 larvae,  representing  five  species,   observed  on    7.5%    polyacrylamide   gel
             were recorded in 615 positive containers distribute   electrophoresis (PAGE). A maximum of  eight
             among 266 out of 1440 houses visited. These were     esterase bands with different relative mobility were
             Ae. aegypti  (Linn.),  Ae. albopictus  (Skuse), Cx.   detected in this mosquito  distributed  among  the
             quinquefasciatus   (Say),   Cx.   fuscocephala       different life stages. The Rm (relative mobility) of
             (Theobald),  Ar. subalbatus  (Coquillett). The       these  bands  were Rm 1.0, 0.92, 0.84, 0.70, 0.60,
             highest percentage of larvae was  Ae. albopictus     0.52,  0.42  and 0.20 respectively based on
             (54.72%)  and  the lowest was Cx.  fuscocephala      decreasing  mobility. No esterase band was
                                                                                    st
                                                                                           nd
             (0,39%). The density of Ae. aegypti is higher than   observed in eggs, 1  and 2  inslar larvae.  Third
             Ae. albopictus in area-2, area-3, and area-4 and the   instar larvae possessed two esterase bands denoted
             density  of Ae. albopictus  was higher than  Ae.     as Est 1 and Est 2, Eight esterase bands, Est 1-8,
                                                                                   th
             aegypti  in area-5, area-1 and area-6.  More  than   were observed in 4  instar larvae. Pupae possessed
             90% larvae in Banani area  was  Ae. albopictus.      7 esterase bands: Est I, Est 2, Est 3, Est 4, Est 5,
             Among the indoor containers, the highest (29.7%)     Est 6 and Est 7. Three esterase bands, Est I, Est 2
             relative frequency was observed in bucket, gallon    and Est 3 were observed in adult females and two
             jar etc. (IN03) and the lowest was 0.1% in AC drip   (Est 1 and Est 2) in adult males. The present study
             pan (1N16). No larva was found in the  bamboo        revealed developmental stage-specific variability
             stump  (IN17) and coconut shell (1N18). The          in esterase expression of Ae. aegypti.
             density of both  Ae. aegypti  and  Ae. albopictus
             were the highest (37.76%) in clay jar, pot, pitcher   190  RAHMAN  A.B.M.M.; KHANUM, H.;
             (IN04) and the lowest (0.12%) in empty flower pot    FARHANA, R.  (Dept. of Zoology, Dhaka
             (IN12). In the outdoor place, the relative frequency   University, Dhaka) & CHOWDHURY, M.A.
             was  the  highest (14.3%) in clay jar/ pot/ pitcher   (Safeway  Pest Control, Dhaka).  CURRENT
             (OU03)  and  the lowest (0.2%) in money plant        STATUS       AND       ENDEMICITY         OF
             glass bulb (OU19). Density of larvae of both Ae.     FILARIASIS     IN    THAKURGAON,         THE
             aegypti  and Ae.  albopictus  are the highest        NORTHERN PART  OF BANGLADESH.  Bang.
             (82.51%) in cemented tank/ hole/jar,  aquarium,      J. Zool., 2008, 36 (1), 111-116.
             water  tank,  plastic tank (OU04) and the lowest
             (0.02%) in leaf axils (OU14) and money  plant        In the present study, three villages, viz. Fokdonpur,
             glass bulb (OU19). It was found that clay jar, pot,   Khankah and Gobindanagar in the Thakurgaon
             pitcher  (IN04),  bucket, gallon jar etc. (1N03),    Sadar  Thana,  which is the most endemic for
             cemented tanks,  artificial  ponds, bathtubs, plastic   filariasis, were surveyed. On an average 4.20%
             tank, tin tank, water reservoir (IN05), drum (IN06),   people  were  infected with filariasis in those
             flower  vase  (IN01), tin pot, jerry can, aluminum   villages. Sex was not a risk factor for this disease.
             jar/ pot/ container etc.(IN11) are important indoor   The respondents had poor knowledge regarding the
             containers as mosquito breeding places.It  is        transmission of filariasis. Among the  affected
             suggested  to reduce the availability of water       people,  55.67%  were illiterate and 25%  had
             reservoir to control container breeding mosquitoes   primary  education. The age group, 31-40 years,
             in Dhaka city.                                       showed the highest rate (35.23%) of infection and
                                                                  the age group, 0-10 years, showed the lowest rate
             189  JAHAN,  I.; ALAM, M. S.; BEGUM, R.A.;           (3.41%) of infetction. Most of  the  respondents
             BEGUM, A. & SHAHJAHAN, R.M. (Dept.                   (77.27%) earned below Tk. 2000  per  month  and
             of    Zoology,   Dhaka    University,  Dhaka).       were  unable to purchase mosquito net after
             ELECTROPHORETIC EXPRESSION  PATTERNS



                                                             54
   56   57   58   59   60   61   62   63   64   65   66