EnvironmentalEnvironmental ChallangesChallanges
Bisphenol A (BPA)M ld th/illMold growth/illnessLead extent/illnessLead extent/illness
Ray F. Garman, MD MPHay Ga a ,
Department of Preventive Medicine and EnvironmentalMedicine and Environmental
HealthUK C ll f P bli H lthUK College of Public Health
BISPHENOL ABISPHENOL A
In polycarbonate plastics, including someIn polycarbonate plastics, including some water bottles and baby bottles, & lining of some canned goodsg
FDA:: “Safe at typical exposure levels fromFDA:: Safe at typical exposure levels from food and drink”FDA Final Report is not out yet; noFDA Final Report is not out yet; no comment yet about hormone effects specificallyp y
BISPHENOL ABISPHENOL A
American Chemistry Council (Plastic y (Industry Trade Group): If FDA determines that existing margins of safety are g g yinsufficient in infant applications, we will promptly phase out use of BPA in baby p p y p ybottles and infant formula packaging
BISPHENOL ABISPHENOL A
Natural Resources Defense Council: (NRDC):
FDA has consistently ignored science and sound policy It’s time for the FDA toand sound policy…It s time for the FDA to protect infants and pregnant women.
BISPHENOL ABISPHENOL A
FDA “ lFDA: “… present consensus among regulatory agencies in the United States, Canada, Europe, and Japan is that current levels of exposure toand Japan is that current levels of exposure to BPA through food packaging do not pose an immediate risk to the general population,immediate risk to the general population, including infants and babies”
BISPHENOL ABISPHENOL A
CANADA (late October): BPA banned in baby bottles
FDA: Canadian action taken “out of abundance of caution” No proof of harm to babies with typical exposure to BPAto BPA
BISPHENOL ABISPHENOL A
In polycarbonate plastics, including someIn polycarbonate plastics, including some water bottles and baby bottles, & lining of some canned goodsg
FDA:: “Safe at typical exposure levels fromFDA:: Safe at typical exposure levels from food and drink”FDA Final Report is not out yet; noFDA Final Report is not out yet; no comment yet about hormone effects specificallyp y
BISPHENOL ABISPHENOL A
WHAT TO TELL–WHAT TO TELL PATIENTS:PATIENTS:
–Still a questionable exposureexposure
ACOEM HHE with Indoor MoldsACOEM HHE with Indoor MoldsACOEM HHE with Indoor MoldsACOEM HHE with Indoor Molds
Important Allergens:Important Allergens:Important Allergens:Important Allergens:5% with allergic airway symptoms lifetime5% with allergic airway symptoms lifetimeMay produce MycotoxinsMay produce MycotoxinsMay produce MycotoxinsMay produce Mycotoxins
“Current scientific evidence does not support the“Current scientific evidence does not support theCurrent scientific evidence does not support the Current scientific evidence does not support the proposition that human health has been proposition that human health has been adversely affected by inhaled mycotoxins in adversely affected by inhaled mycotoxins in ad e se y a ected by a ed ycoto sad e se y a ected by a ed ycoto shome, school, or office environments.”home, school, or office environments.”
MOLD GROWTHMOLD GROWTHMOLD GROWTHMOLD GROWTH
Hydroscopic surfaces supportHydroscopic surfaces supportHydroscopic surfaces support Hydroscopic surfaces support growth, even clay brick and growth, even clay brick and
t if i t it if i t icement if moisture is cement if moisture is sufficiently absorbedsufficiently absorbed
>3>3 4 Molecule depth of water4 Molecule depth of water>3>3--4 Molecule depth of water 4 Molecule depth of water required to allow droplets to runrequired to allow droplets to run
IOM Summary of FindingsIOM Summary of Findingsthe Association between Health Outcomes &the Association between Health Outcomes &the Association between Health Outcomes & the Association between Health Outcomes &
Exposure to Damp Indoor Environments Exposure to Damp Indoor Environments
DAMP INDOOR DAMP INDOOR SPACESSPACES
National Academies National Academies PressPressPressPress
Washington, DC Washington, DC 2004200420042004
Particle Board release ofParticle Board release ofParticle Board release of Particle Board release of Formaldehyde is increased with Formaldehyde is increased with yy
increased Relative Humidityincreased Relative Humidity
PVC backing on carpet tiles PVC backing on carpet tiles increases release of alcohols with increases release of alcohols with
increased Relative Humidityincreased Relative Humidityincreased Relative Humidity increased Relative Humidity
Association between Health Association between Health Outcomes and Damp Indoor Outcomes and Damp Indoor
EnvironmentsEnvironmentsEnvironmentsEnvironments
Damp Space Associations:Damp Space Associations:CausalCausal RelationshipRelationshipCausalCausal RelationshipRelationship
NONENONE
Association between Health Association between Health Outcomes and Damp indoorOutcomes and Damp indoorOutcomes and Damp indoor Outcomes and Damp indoor
EnvironmentsEnvironments
LimitedLimited or or SuggestiveSuggestive EvidenceEvidence
DyspneaDyspneaAsthma developmentAsthma developmentAsthma developmentAsthma developmentLower Respiratory Illness in Lower Respiratory Illness in
otherwise healthy childrenotherwise healthy childrenotherwise healthy children otherwise healthy children
Association between Health Association between Health Outcomes and Damp indoorOutcomes and Damp indoorOutcomes and Damp indoor Outcomes and Damp indoor
EnvironmentsEnvironmentsInadequateInadequate or or InsufficientInsufficient of Associationof Association
Airflow Obstruction in otherwise healthy Airflow Obstruction in otherwise healthy personspersonspersonspersonsCOPDCOPDN O ti l I h l ti FN O ti l I h l ti FNon Occupational Inhalation FeversNon Occupational Inhalation FeversLower Respiratory illness in otherwise Lower Respiratory illness in otherwise
healthy adultshealthy adults
Association between Health Outcomes and Association between Health Outcomes and D i d E i tD i d E i tDamp indoor Environments:Damp indoor Environments:
InadequateInadequate or or InsufficientInsufficient AssociationAssociationAcute Idiopathic Pulmonary Hemorrhage Acute Idiopathic Pulmonary Hemorrhage in Infantsin Infants
Mucous Membrane Irritation Syndrome Mucous Membrane Irritation Syndrome yySkin, GI, Neuropsychiatric, Reproductive Skin, GI, Neuropsychiatric, Reproductive
symptomssymptomssymptomssymptomsFatigueFatigueCCCancerCancerRheumatologic & other immune diseases Rheumatologic & other immune diseases
Association between Health Association between Health Outcomes with Mold and otherOutcomes with Mold and otherOutcomes with Mold and other Outcomes with Mold and other
Agents in Damp Indoor Agents in Damp Indoor EnvironmentsEnvironments
Damp Space Associations:Damp Space Associations:CausalCausal RelationshipRelationshipCausalCausal RelationshipRelationship
NONENONE
Association between Health Association between Health Outcomes and Mold or otherOutcomes and Mold or otherOutcomes and Mold or other Outcomes and Mold or other
agents in Damp Environmentsagents in Damp Environments
Sufficient Evidence of AssociationSufficient Evidence of Association
Nose & Throat SymptomsNose & Throat SymptomsWheezeWheezeWheezeWheezeCoughCoughAsthma Sx in sensitized asthmatic personsAsthma Sx in sensitized asthmatic personsAsthma Sx in sensitized asthmatic personsAsthma Sx in sensitized asthmatic personsHypersensitivity Pneumonitis in susceptibles Hypersensitivity Pneumonitis in susceptibles
Association between Health Association between Health Outcomes and Mold or otherOutcomes and Mold or otherOutcomes and Mold or other Outcomes and Mold or other
agents in Damp Environmentsagents in Damp Environments
LimitedLimited or or SuggestiveSuggestive AssociationAssociation
Lower Respiratory Illness in Lower Respiratory Illness in otherwise healthy childrenotherwise healthy childrenotherwise healthy childrenotherwise healthy children
Association between Health Association between Health Outcomes and Mold or otherOutcomes and Mold or otherOutcomes and Mold or other Outcomes and Mold or other
agents in Damp Environmentsagents in Damp EnvironmentsInadequate or Insufficient EvidenceInadequate or Insufficient Evidence--DyspneaDyspnea
--Airflow obstruction in otherwise healthy personsAirflow obstruction in otherwise healthy persons-- COPDCOPD
Non occupational inhalation feversNon occupational inhalation fevers--Non occupational inhalation feversNon occupational inhalation fevers-- Lower Respiratory Illness in otherwiseLower Respiratory Illness in otherwise
Healthy adultsHealthy adultsHealthy adultsHealthy adultsAcute Idiopathic Pulmonary Hemorrhage in Infants Acute Idiopathic Pulmonary Hemorrhage in Infants
Association between Biological &Association between Biological &Association between Biological & Association between Biological & Chemical Exposures and Chemical Exposures and
Exacerbation of Asthma in Exacerbation of Asthma in Sensitive PersonsSensitive PersonsSensitive PersonsSensitive Persons
From:From: Clearing the AirClearing the AirFrom: From: Clearing the AirClearing the AirIOMIOM20002000
ASTHMA ASTHMA SSOC O / O SSSOC O / O SASSOCIATION/RELATIONSHIPASSOCIATION/RELATIONSHIP
Biological Agents Chemical AgentsBiological Agents Chemical Agents
Sufficient Evidence of Causal RelationshipSufficient Evidence of Causal Relationship
Cat ETS in preschoolersCat ETS in preschoolersCockroachCockroachHouse Dust Mite House Dust Mite
ASTHMA ASSOCIATION/RELATIONSHIP
Biological ChemicalBiological Chemical
ASSOCIATION/RELATIONSHIP
Biological ChemicalBiological Chemical
Sufficient evidence of an AssociationSufficient evidence of an AssociationSufficient evidence of an AssociationSufficient evidence of an AssociationDog Dog NONOxx NONO22
Rhinoviruses Rhinoviruses
ASSOCIATION/RELATIONSHIP
Biological ChemicalBiological ChemicalASTHMA
Limited Evidence of an AssociationLimited Evidence of an AssociationDomestic Birds ETS is school age adultsDomestic Birds ETS is school age adultsDomestic Birds ETS is school age, adults Domestic Birds ETS is school age, adults
Chlamydia trachoma is FormaldehydeChlamydia trachoma is FormaldehydeMycoplasma pneumoniae FragrancesMycoplasma pneumoniae FragrancesMycoplasma pneumoniae FragrancesMycoplasma pneumoniae FragrancesRSVRSV
BiologicalBiological ChemicaChemicallInadequate or Insufficient Evidence for Inadequate or Insufficient Evidence for AssociationAssociation
Cow, horse PesticidesCow, horse PesticidesRodents PlasticizersRodents PlasticizersChlamydia Trachomatis Chlamydia Trachomatis HouseplantsHouseplantsppPollen ExposurePollen Exposure
(in indoor environment) (in indoor environment) Insects other than CockroachesInsects other than CockroachesInsects other than Cockroaches Insects other than Cockroaches
Inadequate Evidence of Inadequate Evidence of AssociationAssociation
MM M b I it ti S dM b I it ti S dMucousMucous Membrane Irritation SyndromeMembrane Irritation SyndromeSkin ,GI, Neuropsychiatric, Reproductive SxSkin ,GI, Neuropsychiatric, Reproductive SxFatigueFatigueCancerCancerRheumatologic & other immune diseasesRheumatologic & other immune diseases
Presence of fungus does not indicate moldPresence of fungus does not indicate moldPresence of fungus does not indicate mold Presence of fungus does not indicate mold damagedamage
“Indicator Fungi” that exceed outdoor “Indicator Fungi” that exceed outdoor t ti i di tt ti i di t M ld C l i tiM ld C l i ticoncentration indicate concentration indicate Mold ColonizationMold Colonization
ASTHMA ASTHMA ASSOCIATION/RELATIONSHIPASSOCIATION/RELATIONSHIP
Other IOther Impactsmpacts not Addressednot AddressedOther IOther Impactsmpacts not Addressednot AddressedHouse Dust MitesHouse Dust MitesVirusesVirusesTobacco SmokeTobacco SmokeCockroachesCockroachesPesticidesPesticidesNONO22 NONOxx
See IOM Report See IOM Report Clearing the Air, 2000Clearing the Air, 2000Indoor Allergens, 1993Indoor Allergens, 1993g ,g ,
Indicator Fungi:Indicator Fungi:Indicator Fungi:Indicator Fungi:
******Aspergillus fumigatusAspergillus fumigatusAspergillus fumigatus Aspergillus fumigatus A. versicolorA. versicolorA penecilloides Actinomyctes A penecilloides Actinomyctes
Gram Negative BacteriaGram Negative BacteriaGram Negative BacteriaGram Negative Bacteria***Penecillium***Penecillium
^Stachybotrys chartarum^Stachybotrys chartarum^Chartomium PLUS: ^Chartomium PLUS: Trichoderma sp. ActinomyctesTrichoderma sp. ActinomyctesUrocladum sp. Gram Neg BacteriaUrocladum sp. Gram Neg BacteriaUrocladum sp. Gram Neg Bacteria Urocladum sp. Gram Neg Bacteria
Some Mold Toxic ProductsSome Mold Toxic ProductsSome Mold Toxic ProductsSome Mold Toxic Products
Fusarium producing DONFusarium producing DONFusarium producing DON Fusarium producing DON (deoxynivalenol); called vomitoxin(deoxynivalenol); called vomitoxin
OTA (ochratoxin A); leads to DNA breaksOTA (ochratoxin A); leads to DNA breaks
AFBAFB11 (Aflatoxin); leads to expoxide through (Aflatoxin); leads to expoxide through PP450450 SystemSystemPP450450 System System
“Hypersensitivity Pneumonitis Antigens” “Hypersensitivity Pneumonitis Antigens” yp y gyp y gTesting (IgG Antibodies) of limited prognostic Testing (IgG Antibodies) of limited prognostic Values, rather indicators of exposure. Values, rather indicators of exposure.
Perhaps better test is StachylsenPerhaps better test is Stachylsen(protein hemolysin) as indicator of exposure to(protein hemolysin) as indicator of exposure to(protein hemolysin) as indicator of exposure to (protein hemolysin) as indicator of exposure to
Stachybotrys chartarum, [not the same as Stachybotrys chartarum, [not the same as satratoxin H a trichothecene]satratoxin H a trichothecene]satratoxin H, a trichothecene]satratoxin H, a trichothecene]
Bacteria Genera Isolates from Building Materials:Bacteria Genera Isolates from Building Materials:AcinatobacterAcinatobacterBacillus NocardiaBacillus NocardiaClavibacter StreptomycesClavibacter StreptomycesCorybacterium ThermonosporiaCorybacterium ThermonosporiaFlavo BacteriumFlavo BacteriumMycobacteriaMycobacteria
Remediation TasksRemediation TasksRemediation TasksRemediation Tasks
STOP Water IntrusionSTOP Water IntrusionIdentify Vulnerable PopulationsIdentify Vulnerable Populationsy py pDetermine Extent & Location of Determine Extent & Location of
Fungal ContaminationFungal Contamination(i.e. water and nutrients)(i.e. water and nutrients)
Identify Moisture DynamicIdentify Moisture DynamicControl source of moisture and nutrientsControl source of moisture and nutrients
after initial remediationafter initial remediation
DECONTAMINATION OF MOLDDECONTAMINATION OF MOLD--11DECONTAMINATION OF MOLDDECONTAMINATION OF MOLD 11
(Work site example)(Work site example)(Work site example)(Work site example)Internal Capsule in large room; wiped withInternal Capsule in large room; wiped withf i id i di t lf i id i di t lfungicide immediatelyfungicide immediatelyAir lock at both ends, 4 chambersAir lock at both ends, 4 chambersHazHaz Mat SuitsMat Suits
DECONTAMINATION OF MOLDDECONTAMINATION OF MOLD--22DECONTAMINATION OF MOLDDECONTAMINATION OF MOLD 22
(Work site example)(Work site example)(Work site example)(Work site example)Office items into Chamber #1Office items into Chamber #1M d F i id it i #2M d F i id it i #2Move, and Fungicide items in #2Move, and Fungicide items in #2Move, and HEPA vacuum in #3Move, and HEPA vacuum in #3Move, Move, rewiperewipe in #4in #4Out of airlock for inspection possiblyOut of airlock for inspection possiblyOut of airlock for inspection, possiblyOut of airlock for inspection, possibly
repassagerepassage
DECONTAMINATION OF MOLDDECONTAMINATION OF MOLD--33DECONTAMINATION OF MOLDDECONTAMINATION OF MOLD 33
(Work site example)(Work site example)(Work site example)(Work site example)DISCARD: Plants, Paper, insulation ceiling DISCARD: Plants, Paper, insulation ceiling tiles insulationtiles insulationtiles, insulationtiles, insulationCLEAN: Drip pans, Office Machines, CLEAN: Drip pans, Office Machines, C t U h l t d tC t U h l t d tCarpets, Upholstered seatsCarpets, Upholstered seats
Rye Grass StaggersRye Grass StaggersRye Grass StaggersRye Grass Staggers
ld t i t d f d t h dld t i t d f d t h dmold contaminated feed to herd mold contaminated feed to herd animalsanimals
ASTHMA ASTHMA SSOC O / O SSSOC O / O SASSOCIATION/RELATIONSHIPASSOCIATION/RELATIONSHIP
Mucous Membrane Irritation SyndromeMucous Membrane Irritation Syndromeyy(MMI):(MMI):
RhinorrheaRhinorrheaNasal CongestionNasal CongestionSore ThroatSore Throat
(?Inflammatory Cytokine based) (?Inflammatory Cytokine based)
A M ld Q ti ?A M ld Q ti ?Any Moldy Questions?Any Moldy Questions?
Heavy lead is not always musicHeavy lead is not always music
Lead PoisoningLead PoisoningLead has no known biological function.Lead has no known biological function.
Lead PbLead Pb++++, competes with Ca, competes with Ca++++, Fe, Fe++++
It is cheap, useful, easy to mine, thereforeIt is cheap, useful, easy to mine, thereforeIt is cheap, useful, easy to mine, thereforeIt is cheap, useful, easy to mine, thereforeLead is ubiquitousLead is ubiquitous-- in air, food, water, soil, ceilings in air, food, water, soil, ceilings etc.etc.
There is no consensus for safe lower limit for lead.There is no consensus for safe lower limit for lead.
4848
Number of new cases with blood lead levels Number of new cases with blood lead levels >> 25 25 g/g/dLdL that occurred among 100,000 employed that occurred among 100,000 employed
d lt 16d lt 16 64 ld i 2005 N ll t64 ld i 2005 N ll tadults 16adults 16--64 years old in 2005. Null category 64 years old in 2005. Null category states did not report.states did not report.
Uses and Sources of Uses and Sources of LeadLead
Paint (until 1970)Paint (until 1970)Household dust (via settlement of airHousehold dust (via settlement of airHousehold dust (via settlement of air Household dust (via settlement of air
pollution, paint removal)pollution, paint removal)C ili d tC ili d tCeiling dustCeiling dustOccupationalOccupationalSolderSolderCeramic glazesCeramic glazes
5050
Ceramic glazesCeramic glazesMines, smeltersMines, smelters
More Uses and More Uses and Sources of Lead Sources of Lead
TV's, Computer monitorsTV's, Computer monitorsBatteries, Bullets SinkersBatteries, Bullets SinkersAviationAviationXX--ray shieldsray shieldsCrystalCrystal--ware (high levels in decanters)ware (high levels in decanters)ExplosivesExplosivesNN ti k li i f t (i th t)ti k li i f t (i th t)NonNon--stick linings of pots (in the past)stick linings of pots (in the past)Plastic colouring (wire, blinds)Plastic colouring (wire, blinds)PewterPewter
5151
PewterPewter
Home Lead TestingHome Lead TestingHome Lead TestingHome Lead Testing
Reduction of Lead Reduction of Lead hazards in the homehazards in the home
5353
Absorption of LeadAbsorption of Lead
5454
Absorption of Absorption of LeadLead
Lead goes down iron or calcium absorption pathway in Lead goes down iron or calcium absorption pathway in g p p yg p p yGIT.GIT.Children absorb lead well orally (~50%) cf adults poorly Children absorb lead well orally (~50%) cf adults poorly ( 10%) Child l h h d t th ti it( 10%) Child l h h d t th ti it(~10%). Children also have more hand to mouth activity.(~10%). Children also have more hand to mouth activity.Lead absorption is enhanced if diet is poor in iron or Lead absorption is enhanced if diet is poor in iron or calcium.calcium.calcium.calcium.Pica is one of the worst risk factors.Pica is one of the worst risk factors.Lead can be inhaled.Lead can be inhaled.[Tetraethyl lead can be absorbed via skin].[Tetraethyl lead can be absorbed via skin].
S:S:\\LeadgpcLeadgpc\\BB Lead Poisoning.pptBB Lead Poisoning.ppt 5555
Contribution ofContribution ofSourcesSourcesSourcesSources
5656
Distribution ofDistribution ofDistribution of Distribution of LeadLead
95% long bones.95% long bones.Binds into matrix.Binds into matrix.R l d d iR l d d iReleased during Released during osteolysis.osteolysis.4% brain,liver, kidneys.4% brain,liver, kidneys.4% brain,liver, kidneys.4% brain,liver, kidneys.1% blood.1% blood.Crosses placenta, foetal Crosses placenta, foetal
5757
BBB is openBBB is open
Release of lead during Release of lead during osteolysisosteolysis
Pregnancy increases mobilization of lead from Pregnancy increases mobilization of lead from maternal skeletonmaternal skeletonGulson BL, Jameson CW, Mahaffey KR, Mizon KJ, Korsch MJ, Vimpani G.. J Lab Clin Med 1997a;130:51Gulson BL, Jameson CW, Mahaffey KR, Mizon KJ, Korsch MJ, Vimpani G.. J Lab Clin Med 1997a;130:51--62 62 yy
Mobilization of lead from the skeleton during the postMobilization of lead from the skeleton during the post--natal period is larger than duringnatal period is larger than during ppregnancyregnancy..Gulson BL, Mahaffey KR, Jameson CW, Mizon KJ, Korsch MJ, Cameron MA, Eisman JA. J Lab Clin Med Gulson BL, Mahaffey KR, Jameson CW, Mizon KJ, Korsch MJ, Cameron MA, Eisman JA. J Lab Clin Med yy1998a;131:3241998a;131:324--99
Lead is released in menopausal bone lossLead is released in menopausal bone lossLead levels have second peak in middle ageLead levels have second peak in middle age-- more inmore inLead levels have second peak in middle ageLead levels have second peak in middle age more in more in men than women (NHANES 3).men than women (NHANES 3).Lead follows calcium into and out of bone.Lead follows calcium into and out of bone.
5858
Lead movementLead movement
In childhood, blood lead levels reflect In childhood, blood lead levels reflect the environmental lead level ie the environmental lead level ie exogenousexogenous lead. Protection requires lead. Protection requires placing barriers between the child and placing barriers between the child and p gp gthe lead.the lead.In adults lead levels reflect the releaseIn adults lead levels reflect the releaseIn adults, lead levels reflect the release In adults, lead levels reflect the release of of endogenousendogenous lead from bone, as well lead from bone, as well as the intake ofas the intake of exogenousexogenous leadlead
5959
as the intake of as the intake of exogenousexogenous lead. lead. Protection requires prevention of Protection requires prevention of exposure plus preservation of boneexposure plus preservation of bone
Data from the US NHANES 3 study showing Data from the US NHANES 3 study showing the second peak of lead levels in adulthood. the second peak of lead levels in adulthood. Hi h d lt l l l fl t tiHi h d lt l l l fl t tiHigher adult male levels reflect occupation Higher adult male levels reflect occupation and hobby. High risk occupations would be and hobby. High risk occupations would be
even higher. Women get a posteven higher. Women get a post--menopausal menopausal peak.peak.
6060
Lead and Race. Data from the UIS Lead and Race. Data from the UIS NHANES 3 study showing differences NHANES 3 study showing differences
with racewith race probably reflectingprobably reflectingwith race with race ––probably reflecting probably reflecting differences in accommodation and differences in accommodation and
occupationoccupation
6161
U S Lead Situation 1U S Lead Situation 1U.S. Lead Situation 1U.S. Lead Situation 11.1. 1978 Lead banned from paint1978 Lead banned from paintpp2.2. 1980's1980's-- Levels higher than AustraliaLevels higher than Australia3.3. Late 1980's Removal of lead from gasolineLate 1980's Removal of lead from gasoline44 1980' U i l ti i i1980' U i l ti i i4.4. 1980's Universal questionnaire screening1980's Universal questionnaire screening5.5. 1991 Universal blood testing1991 Universal blood testing6.6. 1990's Public housing program1990's Public housing program66 990 s ub c ous g p og a990 s ub c ous g p og a7.7. 1990's Private housing program1990's Private housing program8.8. 1990's Massive EPA environmental program1990's Massive EPA environmental program
6262
Health Health Eff t fEff t fEffects of Effects of
LeadLeadeadeadConcentration Concentration relatedrelatedIQ/ delinquency IQ/ delinquency related to total related to total dosage in childhooddosage in childhood
6363
dosage in childhooddosage in childhood
Symptoms from lead are rare!Symptoms from lead are rare!Symptoms from lead are rare!Symptoms from lead are rare!
6464
Lead and Lead and NeurodevelopmentNeurodevelopment
Each 0.48 µmol/l(10µg/dl)Each 0.48 µmol/l(10µg/dl) in children.in children.µ ( µg )µ ( µg )= 4 to 7 IQ points (US Acad. Pediatrics).= 4 to 7 IQ points (US Acad. Pediatrics).Industry/ Industry/ Australian Australian government consensusgovernment consensusof 3of 3 55 IQ pointsIQ pointsof 3of 3--55 IQ points.IQ points.Effects on behaviour are FAR WORSE.Effects on behaviour are FAR WORSE.Delinquency rates are 8 times higher in the top 30% Delinquency rates are 8 times higher in the top 30% of bone lead. Needleman 1996.of bone lead. Needleman 1996.Needleman, Herbert L. et al, "Bone Lead Levels and Delinquent Behavior," JOURNAL OF THE AMERICAN Needleman, Herbert L. et al, "Bone Lead Levels and Delinquent Behavior," JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION Vol. 275, No. 5 (February 7, 1996), pgs.363MEDICAL ASSOCIATION Vol. 275, No. 5 (February 7, 1996), pgs.363--369.369.
Measurable adverse behaviour changes in 2 yearMeasurable adverse behaviour changes in 2 yearMeasurable adverse behaviour changes in 2 year Measurable adverse behaviour changes in 2 year olds Mendelsohn 1999. olds Mendelsohn 1999. Alan L. Mendelsohn, Benard P. Dreyer, Arthur H. Fierman, Alan L. Mendelsohn, Benard P. Dreyer, Arthur H. Fierman, Carolyn M. Rosen, Lori A. Legano, Hillary A. Kruger, Sylvia W. Lim, and Cheryl D. Courtlandt "Carolyn M. Rosen, Lori A. Legano, Hillary A. Kruger, Sylvia W. Lim, and Cheryl D. Courtlandt "LowLow--Level Level Lead Exposure and Behavior in Early Childhood“Lead Exposure and Behavior in Early Childhood“ PPediatrics 1998; 101: e10 ediatrics 1998; 101: e10
6565
Lead and IQLead and IQ
6666
Lead and the ElderlyLead and the ElderlyLead and the ElderlyLead and the Elderly
Risk of dementia increases with leadRisk of dementia increases with leadRisk of dementia increases with lead Risk of dementia increases with lead burdenburdenRisk of accidental lead ingestionRisk of accidental lead ingestionRisk of accidental lead ingestionRisk of accidental lead ingestion
6767
Unresolved QuestionsUnresolved QuestionsUnresolved QuestionsUnresolved Questions
How much does lead contribute toHow much does lead contribute toHow much does lead contribute to How much does lead contribute to cognitive decline and Alzheimer’s cognitive decline and Alzheimer’s disease?disease?disease?disease?Do bone preserving therapies or calcium Do bone preserving therapies or calcium supplements reduce cognitive decline?supplements reduce cognitive decline?supplements reduce cognitive decline?supplements reduce cognitive decline?Is lead a modifiable risk factor for Is lead a modifiable risk factor for d ti ?d ti ?dementia?dementia?
6868
Childhood Risk FactorChildhood Risk FactorQuestionnaireQuestionnaireQuestionnaireQuestionnaire
Does your child….
H b h i h NHave a brother or sister, housemate or playmate with an elevated blood lead level?
No Yes
Sometimes eat non-food items such as soil or i t?
No Ypaint? Yes
Have any of the following conditions NoHave any of the following conditions sometimes associated with lead poisoning, eg iron deficiency anaemia, behaviour problem, learning problem or developmental delay?
No Yes
learning problem or developmental delay?