Laws and Principles · 1 Communicable Disease Control in NC Laws and Principles Jean-Marie Maillard...
Transcript of Laws and Principles · 1 Communicable Disease Control in NC Laws and Principles Jean-Marie Maillard...
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Communicable Disease Control in NC
Laws and Principles
Jean-Marie Maillard NC DHHS - Division of Public Health
Epidemiology Section Credits: J.N. MacCormack (Laws), Kristina Simeonsson (Principles)
10/17/2011, EHS
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NC DHHS
Division of Public Health
Epidemiology Section
State Lab. of Public Health Communicable
Disease Branch
Occupational/Environmental
Epidemiology Branch
Who We Are….
Office of Public Health Preparedness & Response
Office of the Chief Medical
Examiner
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Forms of Law
• Statutes - enacted by Legislature (General Assembly).
• Rules - adopted by agencies of Executive Branch of government.
• Ordinances - adopted by local county or municipal government.
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General Aspects of NC Laws • All forms of law are enforceable, although statutes are
generally considered to carry more weight than rules and ordinances
• Rules and ordinances derive their authority from the General Statutes
• Statutes derive their authority from the NC Constitution
• Rules “flesh out” statutes
• Rules should not repeat what is already stated in a statute
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Communicable Disease Laws
• Most, but not all, communicable disease statutes are in Article 6 of Chapter 130A of the NC General Statutes.
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Reporting of Communicable Diseases
• Rule 10A NCAC 41A .0101 – lists reportable diseases, conditions, and
reportable positive laboratory tests – Note foodborne diseases – Reporting time frame: Within 7 days, within 24
hours, or immediately – CD report card –and Electronic Reporting
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Disease Surveillance Systems - NC • CASE REPORTS: NC-EDSS --North Carolina
Electronic Disease Surveillance System-- since 2008 – Prior to NCEDSS: 1987-2007: NETSS (National Electronic
Transmission Surveillance System) • Syndromic Surveillance: NC-DETECT, for early event
detection and monitoring (Hospital Emergency Depts., Poison Center calls, Ambulance runs/EMS)
• Urgent secure communication: NC-HAN (Health Alert
Network, www.nchan.org)
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Who Reports? • Physicians (GS 130A-135) • School principals & DCC operators (GS 130A-136) • Medical facilities may report (GS 130A-137) • Operators of restaurants & other food or drink
establishments (GS 130A-138): • Outbreak or suspected outbreak. • Infected food handler. • Must call LHD within 24 hours. • Not required to send CD report card.
• Laboratories (Report direct to DPH rather than LHD; may report electronically)
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Remember….
• A disease does NOT have to be reportable to be investigable!
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Investigation: Role of Local HD
• The Local Health Department must: – Immediately investigate all reports of Com. Disease – Determine authenticity of the report – Determine identity of all persons for whom control
measures are required – Collect and submit lab specimens – Determine which control measures have been given
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Investigation
• Access to medical records and information • Physician/medical facility/laboratory must
permit local or state health director to examine and copy records pertaining to – diagnosis, treatment, or prevention of a CD – a known or suspected outbreak
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Control Measures
• Control of Communicable Diseases Manual, (APHA publication), except for a few diseases & conditions covered in NCAC
• May be superceded by CDC publications • When not specified, see the guiding
principles in rule 10A NCAC 41A .0201(b).
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Confidentiality
• In general, records that identify a patient specifically are not public records and are to be treated confidentially
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Confidentiality (continued)
• Exceptions: – When necessary for control of a disease
representing a significant public health hazard [GS 130A-143(4) and rule .0211]
– When information is collected by a person other than a physician or nurse, it may not be protectable
– Others as specified in GS 130A-143
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Special Rules
• 10A NCAC 41A .0301-0302: Turtles may not be sold as pets
• 10A NCAC 41A .0303: Records of bird sales by retail stores must be kept for 6 months
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Principles of Communicable Disease
Credits: K. Simeonsson, MD, MSPH
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“Communicable Disease”
An illness due to a specific infectious agent that arises through transmission of that agent or its products from an infected person, animal or inanimate source, to a susceptible host, through an intermediate plant or animal host, vector, or the inanimate environment.
(Adapted fr. Dictionary of Epidemiology, Last, 2001)
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Epidemiologic Triad
Agent
Host Environment
Community
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Types of Agents
Biologic Chemical Physical Bacteria Poison Trauma
Virus Alcohol Radiation Parasite Smoke Fire Protozoa
Fungi Prion (?)
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Agent Factors
• Infectivity • Ability of a pathogen to
establish infection
• Pathogenicity • Ability to cause disease
• Virulence • Severity of illness in those
infected
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Host Factors
• Age • Behavior • Immunologic status • Genetic susceptibility • Nutritional status
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Environmental Factors
• Physical • climate, season, geology
• Biologic • insect vectors
• Socioeconomic • crowding • sanitation
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Community Factors
• Population • Infrastructure • Culture • Medical facilities • Public health infrastructure • Political will
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How Does Infection Occur? Agent
Host Environment
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Chain of Infection
• Agent • Reservoir • Portal of exit • Transmission • Portal of entry • Establishment of infection (disease?)
in new host
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Chain of Infection
Host Agent
Reservoir
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Reservoir
The Habitat in which an infectious agent normally lives, grows, and multiplies
Human Reservoir - Respiratory infections
e.g., tuberculosis, pertussis - Sexually-transmitted infections
e.g., gonorrhea, Chlamydia infection
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Animal Reservoirs: Zoonotic infections Example: Rabies
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Other reservoirs
• Water • Legionella
• Soil
• Clostridium species (botulism, tetanus)
• Histoplasma capsulatum
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Portals
Portals of Entry • GI tract
• Respiratory tract
• Skin
• Mucous membrane
• Percutaneous (blood)
Portals of Exit • Body fluids
• Skin
• Shower head
• Wind
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Modes of Transmission
• Direct • direct contact • droplet spread
• Indirect • Vector • common vehicle • airborne
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Direct Transmission: Direct Contact
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Direct Transmission: Droplet
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Indirect Exposure: Common vehicle?
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Indirect Exposure: Common Vehicle
• Inanimate object that facilitates transmission of an infectious agent – Food – Water – Medical equipment – Toys – Kitchen equipment
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Indirect Exposure: Common Vehicle
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Indirect Exposure: Vector
A living animal (arthropod) capable of transmitting infectious agent from one host to another – biological transmission – mechanical transmission
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Natural History of Disease
• Susceptible stage • Exposure • Incubation period • Onset of symptoms • Clinical disease • Recovery or death • Immunity
– temporary versus permanent
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Incubation Period
• Minutes • Hours • Days • Weeks • Months • Years
Heavy metals Staphylococcal toxin Shigella, Salmonella Hepatitis Rabies, tuberculosis Leprosy
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Spectrum of Disease
Clinical features • Subclinical • Mild • Moderate • Severe / Fatal Epidemiological features • Asymptomatic Carrier • Chronic Carrier
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Varying Degrees of Clinical Severity
0% 20% 40% 60% 80% 100%
TB
Measles
Rabies
Inapparent Mild Moderate Severe Fatal
Mausner & Kramer, 1985
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Levels of Disease Incidence
• Individual infection • Endemic levels • Epidemic levels • Pandemic levels
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Causes of Epidemics
• Change in virulence of agent • Change in environment • Change in host susceptibility • Change in modes of transmission
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Approaches to Prevention Agent
Host Environment
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Prevention: Agent
• Control measures aimed at destroying the agent in its reservoir
• Examples: – chlorination
– surgical scrubbing
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Prevention: Host
• Modify hosts to make them less vulnerable to disease / infection
• Examples:
– vaccination – prophylaxis – improving nutritional status
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Prevention: Environment
• Control measures are adapted to the type of transmission involved
• Examples:
– spraying of insecticide to eliminate mosquito vectors
– draining cooling towers when not in use
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Prevention: Community
• Support your local public health department! • Examples:
– Collaborative investigations: restaurant inspection and co-worker interviews when a Salmonella case who works there is identified
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Conclusion
• Infectious disease results from interactions between agent, host, and the environment
• Epidemiologic triad provides the conceptual framework – disease in individuals – disease in communities – prevention and control measures
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How to reach us Communicable Disease
Branch (24/7):
(919) 733-3419
If only investigations were this easy...