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G. P. CHATTERJEE MEMORIAL AWARD LECTURE Malaria Control in India by Dr

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Presentation on theme: "G. P. CHATTERJEE MEMORIAL AWARD LECTURE Malaria Control in India by Dr"— Presentation transcript:

1 G.P. CHATTERJEE MEMORIAL AWARD LECTURE Malaria Control in India by Dr. V.P. Sharma 91st Session of the The Indian Science Congress Session Chandigarh 4th January 2004

2 Burden of Malaria in the World
million malaria cases in the world 1.5 to 2.7 million deaths due to malaria 90% disease burden in Africa, South of Sahara

3 Estimated Burden of Disease in Disability Adjusted Life Years (DALYs) (WHO Report 2001)
Total DALYs Region % World 40,213,000 - Africa 35,748,000 88.89 The Americas 111,000 2.76 1,945,000 4.83 Eastern Mediterranean Europe 21,000 0.052 Western Pacific 5,16,000 1.28 South East Asia 1,874,000 4.66 India 1,311,800 (70% of SEAR DALYs)

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5 SITUATION ANALYSIS OF MALARIA IN INDIA
1 BILLION POPULATION AT RISK OF MALARIA 10 MILLION POPULATION UNDER SP TREATMENT 2 MILLION CASES REPORTED BY NAMP MALARIA DEATHS REPORTED BY NAMP 6 MAJOR VECTORS-RESISTANT, EXOPHILIC AND OR ENDOPHILIC BEHAVIOR NEW MALARIA ECOTYPES IDENTIFIED SPRAYING PRODUCES TRANSIENT CONTROL WIDESPREAD MONO-DRUG RESISTANCE, MULTI-DRUG RESISTANCE IN P. falciparum INADEQUATE RESOURCES 1 BILLION US DOLLARS LOSS DUE TO MALARIA

6 HUMAN MALARIA PARASITES
Plasmodium vivax Plasmodium falciparum Plasmodium malariae Plasmodium ovale

7 Chronology of drug resistance in SEA Region
CHLOROQUINE 1962 Thailand 1969 Myanmar 1970 Bangladesh 1973 India Indonesia 1981 East Timor 1984 Nepal Sri Lanka 1985 Bhutan SULFADOXINE-PYRIMETHAMINE 1979 India Indonesia 1980 Myanmar Thailand 1985 Bangladesh 1997 Nepal QUININE 1983 Thailand 1986 India MEFLOQUINE 1989 Thailand

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9 Total Deaths in Severe Malaria Cases 61/431 (14.15%) 236/996 (23.69%)
DEATHS DUE TO ARF/ARF COMPLICATIONS IN SEVERE MALARIA IN ISPAT GENERAL HOSPITAL, ROURKELA, ORISSA Total Deaths in Severe Malaria Cases 61/431 (14.15%) 236/996 (23.69%) Deaths Due to ARF/ARF Complications 14/62 (22.58%) 117/265 (44.15%) Deaths Due to Complications without ARF 47/369 (12.74%) 119/731 (16.28%)

10 MALARIA TREATMENT COST OF AN ADULT IN INDIA
Drugs Cost (Rs.)  Chloroquine Chloroquine injection + fluids Sulfadoxine Pyrimethamine Mefloquine Artemether injections Arteether injections Artesunate injections Quinine tables + Tetracycline Quinine injections+IV fluid+Tetracycline   Rs per treatment I/V fluid may be required during Artemisinin treatment

11 MALARIA INCIDENCE AND DRUG CONSUMPTION IN INDIA
6.5 m +s CQ 61 mt CQ 400 mt 2m +s 140 mt SP

12 Malaria in Pregnancy Pregnant women attract twice the number of mosquitoes than non-pregnant women There is a greater susceptibility to P. falciparum than P. vivax during pregnancy Low birth weight babies in malarious areas are 2 to 4 times more likely to experience failure in school.

13 Endless Vicious Cycle of Malaria
Malaria is the leading cause of anemia Malaria affects cognitive development and learning abilities of children Malaria is a risk factor of neuro-sensory and behavioral development in children Malaria-one clinical febrile episode of malaria consumes 5,000 k Cal.

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17 Role of Vectors in Malaria Transmission in India
Malaria Vectors Disease Potential Total malaria cases (%) Pf cases (%) Rural & Urban Vector An. culicifacies + 65 55 An. stephensi ++ 12 5 Regional Vector An. fluviatilis 15 30 An. minimus +++ An. dirus 3 Coastal Vector An. sundaicus 0.4 0.001 Broad categorization based on 1996 NAMP data Low Medium High

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19 Status of Insecticide Resistance Status of Insecticide Resistance
in An. culicifacies Status of Insecticide Resistance in An. culicifacies

20 Distribution of An. culicifacies species A,B,C,D and An
Distribution of An. culicifacies species A,B,C,D and An. fluviatilis Species S,T, and U

21 An. culicifacies Sibling Species
Biological Variations Among members of An. culicifacies Sibling Species Complex Biological Behaviour An. culicifacies Sibling Species A B C D E Anthropophilic index (%)* 0-4 0-1 0-3 0-1 80 Biting Activity All night All night All night Till mid-night - 10-11 pm 10-11 pm 6-9 pm 6-9 pm - Peak Biting Time Vector Potential Vector Non-vector Vector Vector Vector Sporozoite Rate 0.51 0.04 0.3 0.4 20 Resistance to DDT Slow Fast Fast - - Fast Fast Fast - - Resistance to HCH Resistance to Malathion Slow (9-10 yrs.) Medium (6-7 yrs) Fast (4-5 yrs.) - -

22 MAJOR MALARIA ECOTYPES FOUND IN INDIA
RURAL MALARIA URBAN MALARIA FOREST MALARIA IRRIGATION MALARIA PROJECT MALARIA MIGRATION MALARIA BORDER MALARIA

23 Time taken in days (approx) for 50 per cent of the human population to become infected at different reproduction rates with an initial parasite rate of 0.1 per cent 100 65 120 80 50 160 110 20 220 155 10 Over 300 215 5 falciparum rate vivax Reproduction rate

24 Resistance in vectors and parasites Global warming
FACTORS THAT WILL INCREASE MALARIA Irrigation Urbanization Industrialization Migration Natural disasters Resistance in vectors and parasites Global warming Malaria control costs Political instability/war

25 “Everything about malaria is so molded by local conditions that it becomes a thousand epidemiological puzzles. Like chess, it is played with a few pieces but is capable of an infinite variety of situations.” - L.W. Hackett (1937)

26 PERSISTENT ORGANIC POLLUTANTS
Eight Pesticides Aldrin, chlordane, DDT, dieldrin, endrin, heptachlor, mirex and toxaphene Two Industrial Chemicals PCBs and hexachlorobenzene Two unwanted by-products of combustion and Industrial Processes Dioxins and furans

27 TIMES OF INDIA 24 November 1944 (On the introduction of DDT on December 2, 1944)
“It should be stressed that it is a re-enforcement and not a substitute for existing well tried systems of malaria control, which should on no account be relaxed. But we believe that DDT is going to have a big future in the fight against malaria and dysentery in post-war India”

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29 IRRIGATION IN INDIA Million Hectares

30 An.culicifacies Breeding Sites on the Margins of Bargi Dam, M.P.

31 Malaria Outbreak in Bargi Dam area in Narayanganj PHC, M.P.
Dam impounded Dam Dam completed

32 SSP Command area in Gujarat

33 Stagnant Water in Canals of the Sardar Sarovar Project


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