session 1.3 need for disaster responses
DESCRIPTION
from DRR and WASH workshopTRANSCRIPT
Basics in emergencies
Why Health?
• Our aim:– Saving lives– Reducing suffering - both through ensuring public health
• Along with food and shelter, safe water and sanitation health is the highest priority intervention in emergency situations. Unless adequate health services are quickly provided to emergency-affected children and their families, disease and death will follow.
• And unless good hygiene is consistently practiced by affected people, the danger of diarrhoea, cholera and other disease outbreaks will persist.
• This is true in all types of emergencies, from rapid onset natural disasters to long-term crises caused by a range of complex factors.
Why Health? (cont’d)
• Public health response is usually the first intervention in emergencies as it directly associates with saving lives because the high morbidity and mortality rates are attributed to WASH infectious diseases in the first phase of emergency.
• Some diseases, especially diarrhoeal diseases cause considerable dehydration, which can lead to death if not promptly treated. Diarrhoeal diseases can be prevented through access to clean, safe drinking water and through proper hygiene and sanitation measures, including hand washing and safe disposal of human waste.
Source: Oxfam India WASH strategy 2010-2015
Water and diseases
Water-borne (and faecal-oral)
Due to faecal-oral bacteria and non-faecal oral bacteria in water
Diarrhoeas and dysenteries , TyphoidShigellosis , Hepatitis A
Water contaminationPoor sanitationPoor personal hygiene
Water-washed
Due to lack of water Skin and eye infections
Inadequate waterPoor personal hygiene
Water-based
Due to long exposure to microbes living naturally in water
Schistosomiasis, Guinea worm
Water contamination
Water-related insect-vector
Due to insect vectors which breed in water
Malaria, River blindness, Filariasis, Dengue, Yellow Fever
Breeding in waterBiting near water
Sanitation and diseases
Excreta-related helminths
Helminths transmitted through soil
Roundworm, Hookworm, Whipworm
Open defecationGround contamination
Excreta-related insect-vector
Transmitted by flies and cockroaches
Diarrhoea and dysentery
Dirty and unhygienic environment
Key Health Threats
• Poor drainage, stagnant water • People drinking contaminated water• Unsafe excreta disposal• Solid waste deposition• Inappropriate shelter• Insecure environment• People not washing hands at key times
Major communicable diseases in emergencies• Cholera• Malaria• Shigellosis• Scabies • Dengue• Leptospirosis• …… etc.
Groupwork: Factors affecting risk of outbreaks• Population displacement• Population density• Disruption and contamination
of water supply and sanitation services
• Disruption of public health programs
• Ecological changes that favour breeding of vectors
• Displacement of domestic and wild animals
Key Health Interventions
• Provision of treatment in hospitals• Provision of immunization
• Promotion of antenatal care• Provision of delivery services
Which of the above has the most impact?
Epidemiological terms and definitions
• Endemic– The continuing presence of disease within a given geographical
area or population groups• Epidemic
– An outbreak of disease that attacks many people at about the same time and may spread through one or several communities
• Pandemic– When an epidemic spreads throughout the world
• Epidemiology– Study of distribution and determinants of diseases & health
related events and application of this knowledge for prevention and control of diseases
Epidemiological Triad
AGENTBacteria, Viruses,Parasites, fungi
(or) their products
ENVIRONMENTShelter, altitude,
humidity, sanitation,food supply, water
supply, temperatureovercrowding
HOSTAge
genetic susceptibilitynutritional status
previous exposureimmunization status
general physical condition
Vector
Key indicators of health status: Mortality
• Measured as number of deaths per 10000 population per day. It is known as Crude Mortality Rate because it uses the crude numbers for deaths and the population without any adjustment for the composition of the population.
• Crude mortality rate (CMR) is for entire population and under 5 mortality rate (U5MR) is for children under 5 years of age
CMR = No. of deaths X 10000 Population X Period
21 people are reported dead in a camp with population of 20000, in a period of one week. What is the CMR in this case?
Benchmark mortality rates in emergencies
• Crude Mortality Rate:– 0.5 Baseline – 1.0-2.0 Serious – >2.0 Crisis
• U5MR – 0.8-1.2 Baseline– >2.0-4.0 Serious
Key indicators for health status: Morbidity
• Morbidity is the number of NEW cases of a GIVEN DISEASE among the population over a certain period of TIME.
• Measured per 10000 population per day.
Cases Deaths Cases Deaths Cases DeathsAcute watery diarrhoeaBloody diarrhoeaSuspected choleraSevere RTI/pneumoniaSuspected malaria/fever of unknown originMalnutritionMeaslesMeningitisAcute jaundice syndromeOther/unknownTotal
Average CMRAverage U5MR
WEEKLY MORBIDITY / MORTALITY SURVEILLANCE FORM
Name of reporting officer
<5 years 5 years and older TotalReported main cause of illness/death (final diagnosis)
District/Town/Settlement/CampHealth ClinicReporting Period
Faecal-Oral transmission routes
Faeces
Fields
Fluids
Flies
Fingers
Food New host
Barriers to break the faecal-oral chain
Faeces
Fields
Fluids
Flies
Fingers
Food New host
Pit latrines
VIP latrines
Protection of water sources
Protection of food (e.g. storage)Hand-washing at key times
Protection of food(e.g. handling, preparation)
Protection of water in transit and in the shelter
Safe eating (e.g. washing fruits and vegetables before
eating them raw
PRIMARY BARRIERS SECONDARY BARRIERS