by dr. v.p. sharma meghnad saha distinguished fellow ... · slums • slum data was collected for...
TRANSCRIPT
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VECTOR CONTROL IN URBAN AND PERI-URBAN INDIA
byDr. V.P. Sharma
Meghnad Saha Distinguished FellowCentre for Rural Development and Technology
Indian Institute of Technology, Hauz KhasNew Delhi-110016, India
IFCS-VI, Meridien Hotel15 September 2008
Dakar, Senegal
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INDIA: Rural-Urban Distribution• Rural Population 742,490,639 72.2%• Urban Population 286,119,689 27.8%
• Urban Population• Highest Goa 49.76%• Lowest H.P. 9.30%
• UT Population• Highest Delhi 93.18%• Lowest Dadar & Nagar Haveli 22.89%
*GOI, CENSUS- 2001
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National Vector Borne Diseases Control Programme (formerly NMEP/NAMP)
Integrated Disease Control
1. Malaria (Urban Malaria Scheme)2. Dengue /DHF3. Chikungunya virus4. Lymphatic Filariasis5. Japanese encephalitis6. Kala-Azar
Anopheles stephensi Aedes aegypti Culex quinquefasciatus
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National Vector Borne Disease Control ProgrammeURBAN MALARIA SCHEME-1971-72
• Town with 50,000 or more population• API 2 or above• Town should implement civic bye-laws
• 1971-72 23 Towns• 1972-73 05 Towns• Till 1976-77 28 Towns• 1977-78 38 Towns• 1978-1979 37 Towns• 1979-80 12 Towns• 1980-81 17 TownsTotal Towns with UMS functioning 1312007 Cases in India1,476,562 UMS 108,075 (7.32%)
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INTEGRATED VECTOR MANAGEMENT(Urban Malaria Scheme)
• Source Reduction, filling, streamlining, channelising, desilting, deweeding, trimming of drains, water disposal andsanitation, empty water container once in a week, etc.
• Recurrent anti-larval measures like Temephos & Fenthion• Observance of a dry day in a week-rarely followed• Biological Control-Guppy & Gambusia Fishes & Bio-
larvicides (Bacillus thuringiensis & Bacillus sphaericus)• Minor Engineering Works• Malathion Thermal Fogging, Aerosol Space Spray• IRS in Peri-urban settlements• Intensive vector surveillance for Aedes aegypti• Repellents-Deet/Neem oil, Coils, mats, vaporizers• Anti-parasitic measures-EDPT in Malaria Clinics• IEC campaigns
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46634.05203043565.80202536435.11201533380.21201031330.122005
Level of
Urbanisation(
%)
Urban Populati
on (‘000s)
Year
Projected India’s Urban Population
INDIA: Population growth, from 443 million in 1960 to 1,004 million in 2000
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1811 1894 2017 21902795
2220 2476
32453609
5161
1754
0
1000
2000
3000
4000
5000
6000
1901 1911 1921 1931 1941 1951 1961 1971 1981 1991 2001
Y e a r
10.84 11.18 11.99 13.8617.29 17.29
19.9123.34
25.7227.78
10.29
05
1015202530
1901 1911 1921 1931 1941 1951 1961 1971 1981 1991 2001
Year
Number of Towns/UAs
Level of Urbanization
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7.59155,8772,055,02320017.27133,9311,842,01920028.34139,5021,673,1652003
6.55174,1012,660,05719976.49144,3002,222,74819988.53172,2312,019,0652000
7.32108,0751,476,56220075.0685,2701,685,10920064.9389,5431,816,56920058.74150,9101,725,7832004
% +ves UMSUMS (+s)India (+s)Year
Malaria Cases Contributed by UMS Towns
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Average ratio of reported to estimated malaria cases = 36,766/4119 i.e. 9 times71 malarial deaths/3.1 million population (average 22 deaths/million pop/yr)
Burden of Malaria in Ahmedabad City
010000
2000030000
4000050000
91 92 93 94 95 96 97 98 Mean
Cas
es
020406080100120
Mal
aria
l Dea
ths
Reported cases Estimated cases Estimated deaths
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India2006 12,317 184
Delhi2003 2,882 352004 606 32005 1,023 9 2006 3,366 652007 548 12008 July 60
Dengue/DHFSPREAD IN 22 STATES
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SPREAD OF CHIKUNGUNYA IN INDIA
Chikungunya 20071821 cases in 17 states
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LYMPHATIC FILARIASIS IN 250 Distts 20 states 40m cases
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Urban Water Supply Through Tankers
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Hyderabad, India: Women struggle through a crowd to reach a mobile water tanker in a slum area.Photograph: Mahesh Kumar/AP
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Amit Dave/India
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Rural-Urban Migration in India• Rural Population which Migrated to Urban
Areas
25% of the country's poor live in urban areas31% of the urban population is poor
•Traditional rural-urban migration- to improve opportunities and lifestyles. In 1991, 39 million people migrated in rural-urban patterns of which 54% were female.
• Seasonal urban migration- for jobs in industry, harvesting season etc.
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NUMBER OF MIGRANTS BY PLACE OF LAST RESIDENCE –INDIA 2001
2.06,166,930Migrants from other countriesB.3
13.842,341,703Migrants from other states in IndiaB.2
29.776,841,466Migrants from other districts of the stateB.12
70.3181,799,637Migrants from within the districtsB.11
84.2258,641,103Migrants within the state of enumerationB.1
29.9307,149,736Total MigrationsB.1,028,610,328Total PopulationA.
PercentageMigrations by Place of birthCategory
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RURAL URBAN MIGRATION
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SLUMS• Slum data was collected for cities/towns having
50,000 population or more based on 1991 census.
• Population of slums is 40,297,341 (40 million or c4%) from the 607 cities/towns reporting slums.
• More interestingly it comes to ~22% of the total population of these cities (178,393,941).
• This means that almost quater of Indian cities live in slums. And sadly 5,531,062 (5 million) of this population are young children (0-6 age group)
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Increasing share of GDP from Urban centers
Year GDP by Urban Sector
1950-51 29%1990-91 55%2001-02 60%
Thus urban centers (25%) generates 60% country's total GDP.
Large inequality of resources especially income in urban centers.
This is one of the reasons for origin of slums.
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Asia's largest slum, Dharavi, lies on prime property right in the middle of India's financial capital,
Mumbai. It is home to more than a million people. Many are second-generation residents, whose
parents moved in years ago
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Azdirachta indica
0
2
4
6
8
10
12
14
16
18-19 19-20 20-21 21-22 22-23 23-24 24-01 01-02 02-03 03-04 04-05 05-06
No. of An. culicifaciescollected on human bait
Neem cream
Vanishing cream
Hours
Neem Based Repellent
Neem cream
Mosquito Coil
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Poverty and Malaria in India
88.3749.2869.572000
30.8929.2429.671965
% falciparum cases in BPL states
% vivax cases in BPL states
% malaria cases in BPL states
Years
Reference: V.P. Sharma, Current Science; 84(4):513-515, 2003
Below Poverty Line Population in 1999-2000: India 26.1%NE States: Assam 33.47; Manipur 28.54; Meghalaya 33.87; Nagaland 32.67 and Tripura 34.44 Population Below Poverty Line
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BYPASS DESERT COOLER
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Fig. Impact of weekly spraying of Bacillus thuringiensis israelensis (H-14, Strain 164) on anopheline breeding in the construction sites.
0
2
4
6
8
10
12
14
J F M A M J J A S O N D J F M A M J J A S O N D
% H
abita
t pos
itive
/ d
ensi
ty p
er d
ip
Per dip density
% Habitat Pos.
1994 1995
Pre-treatment Post -treatment
Habitat Positivity t= 3.86, p < 0.01Immat. Dendity / dip t= 4.93, p < 0.01
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A comparison of percentage habitat positivity and density/10 dips of anophelines in the construction sites between experimental (B. sphaericus sprayed) and control
(Temephos sprayed) area in Panaji, Goa, India [Kumar et al. 1994 JAMCA, 10(4): 534-539].
0
10
20
30
40
50
60
April May June July Aug. Sept. Oct. Nov. Dec.
Months (1993)
% H
abita
t Pos
itivi
ty/ D
ensi
ty
Density / 10 Dips Control(Abate Sprayed)
Density / 10 DipsExpt. (Spherix sprayed)
% Habitat +ve(Abate Sprayed)
% Habitat+ve Expt. (Spherix sprayed)
Hab. Pos. t= 3.16, p< 0.01Imm. Density t= 2.06, p < 0.05
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A comparison of slide positivity rate (SPR) and monthly parasite incidence (MPI) between B. sphaericus sprayed area and the temephos-sprayed
control area.[Kumar et al. 1994: JAMCA, 10(4): 534-539.]
0
5
10
15
20
25
30
Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sept. Oct. Nov. Dec.
Slid
e Po
sitiv
ity R
ate
/ Par
asite
Inci
denc
e
SPR SPHERIX TREATED AREA
SPR ABATE TREATED AREA
P. I. ABATE TREATED AREA
P. I. SPHERIX TREATED AREA
MPI Chi Sq. = 2. 08 p < 0.05
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Fig. Impact of introduction of Aplocheilus blocki on the immature population of Anopheles stephensi in Candolim PHC in Goa, India.
0
2
4
6
8
10
12
14
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18
J F M A M J J A S O N D J F M A M J J A S O N D
% H
abita
t pos
itive
/ P
er d
ip d
ensi
ty
1994 1995
Pre-treatment Post-treatment
% HabitatPositive
Per Dip density
Hab. Pos. t= 5.19, p < 0.01Density / Dip t = 3.57, p < 0.01
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GUPPY FISHES GAMBUSIA FISHES
Composite Culture Abandoned Cement Tank
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Applying expanded polystyrene beads to control mosquito breeding.
Well treated with expanded Polystyrene beads
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Photos: Devastating Earthquake in Gujarat
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Sinking Water Table-Hand Pumps Dry
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Man hole covers used in mosquito proofing
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Water Harvesting Structures Provide Immense Opportunities for Disease Vectors to Breed.
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• RESEARCH & DEVELOPMENT
• Bypass Desert Cooler• Replacing chemicals by Bt/Bs/Fishes/Neem Oil• Health Cards FOR migrants• Mass Production and Release of Fishes• Mosquito Proofing of RWH structures• Expanded polystyrene beads• Organized Solid Waste Disposal• Covering of drains• Land reclamation• Resource and employment generation (plantations, carp culture)
• ACTION REQUIRED
• 24X7 Water Supply• Health Impact Assessment• “Bhagidari”-Sharing responsibility with citizens• Adoption of uniform legislative and building bylaws• Integrated vector management• Integrated pest management in horticulture and peri-urban agriculture• Awareness campaigns
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THANK YOU