Environmental Health – SESSION 7.CDT04211
Read the complete lesson in an organized slide-by-slide format. This topic contains 18 learning sections from the source presentation.
LESSON CONTENTS — 18 SECTIONS
Session 7
EMPLOY STRATEGIES OF DISEASE PREVENTION IN PREVENTING AND CONTROLLING COMMUNICABLE DISEASE IN THE COMMUNITY
Related task
Describe communicable disease
Identify risk factors of communicable disease
Identify potential contamination of water source
Undertake immunization
Educate community on food safety
Ensure safe injection
Identify sources of vector
Introduction………..
Communicable disease; is an illness caused by infectious agents or pathogens that can spread directly from one person to another, typically through respiratory droplets, body fluids of contact with contaminated surfaces.
Examples influenza(flu), tuberculosis(TB), covid-19, HIV/AIDS, hepatitis, cholera, malaria, measles, sexual transmitted infections(STIs).
All of above diseases if not treated early may lead to life threatening complication.
Risk factors of communicable disease
The risk may vary depending on the specific disease. The following are some common factors
Close contact with infected individuals.
Poor hygiene practices. Eg not washing hands frequently, not covering cough or sneezes
Crowded or unsanitary living conditions. Eg living environment with poor sanitation ca facilitate spread of disease
Cont………………..
Travel to areas with high diseases prevalence.
Weakened immune system.
Lack of vaccination.
Unsafe sexual practices.
Exposure to contaminated food or water.
Inadequate access to healthcare.
Potential contaminated to water sources
Water source can become contaminated by various means, leading to potential health risks for those who consume or come into contact with the contaminated water.
Some common causes of water contamination include
Microbial pathogens; bacteria, viruses, and parasites from human or animal waste can contaminate water sources, leading to diseases such as cholera, typhoid fever and giardiasis.
Cont………………….
Chemical pollutants; industrial runoff, agriculture pesticides and fertilizers, may introduce chemical to water sources posing risks of human health.
Sediment and suspended solids; soil erosion, construction activities, and urban runoff can introduce sediment and suspended solids into water sources affecting water quality and aquatic habitats
Cont…………………………
Nutrient pollution; excess nutrients from fertilizers, sewage, and animal waste can lead to algal blooms and depletion of oxygen in water bodies, which can harm aquatic life and human health.
Toxic algae; certain species of algae can produce toxins that contaminate water sources during algal blooms, leading to health problems such as skin irritation, respiratory issues.
Cont………………
Heavy metals; industrial activities, mining operations and natural sources can introduce heavy metals such as leading arsenic and cadmium into water sources, posing serious health risks, and cancer.
Radionuclides; natural occurring radioactive elements such as radium and uranium can contaminate water sources posing serious health risk.
Cont……………………..
Emerging contaminants; include substance such as pharmaceuticals, personal care products and microplastics which can enter sources through various routes and cause health effects,
Undertake immunization
Involves receiving vaccines to protect against various infectious disease. Vaccines stimulate the immune system to produce an immune response without causing the disease itself.
This helps body to develop immunity to specific pathogens, preventing illness and reducing the spread of communicable disease.
Cont……………………
Immunization is critical public health intervention that not only protects individuals from serious disease but also contributes to community immunity or herd immunity.
Immunization schedules vary nby country and may include vaccines against diseases such as measles, mumps, rubella, pollion, influenza, hepatitis B, pneumococcal disease, and human papilomavirus(HPV).
Educate community on food safety
Educating the community on food safety is crucial for preventing foodborne illnesses and promoting public health
Educate community on
Proper food handling
Safe food storage
Cooking temperature
Avoiding high-risk foods
Hand hygiene
Cont………………
Awareness of food recalls
Symptoms of food borne illness
Safe food preparation practices
Cleaning and sanitizing
Personal hygiene
Ensuring safe injection
Use sterile equipment
Proper needle disposal
Hand hygiene
Clean injection site
Safe medication handling
Proper injection technique
Single-dose vials and ampules
Avoiding needle recapping
Education and training
Monitoring and auditing
Sources of vectors
Vectors are organisms that transmit pathogens from one host to another, thereby spreading infectious diseases. Common sources of vectors include;
Mosquitoes; transmitting disease such as malaria, dengue fever, zika virus.
Ticks; transmiting variety pathogens including lyme disease,tick borne encephalitis
Cont…………………..
Fleas; transmit disease such plague
Sendflies; transmit leishmaniasis
Tsetse flies; transmit african trypanasomiasis(sleeping sickness)
Triatomine bugs; transmit trypanasoma cruzi
Blackflies; transmit onnchocerciasis( river blindness)
Rodents; transmit plague, leptospirosis
Any question
Additional Study Notes
This section is separated from the source slides to make the lesson easier to revise.
Supplementary learning: Environmental health topics should be revised by linking the environmental hazard to its source, route of exposure, health effects, prevention and control measures, community participation, and the role of health workers. Priority areas commonly include safe water, sanitation, waste management, food hygiene, housing, vector control and prevention of environmental pollution.
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