overview of child health - session 4 - child health in... · 2015. 7. 20. · neonatal...
TRANSCRIPT
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Overview of Child Health ���in developing countries���
Brett D. Nelson, MD, MPH, DTM&H Division of Global Health MassGeneral Hospital for Children Harvard Humanitarian Initiative [email protected]
Photo by Brett Nelson. No permission needed.
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Discussion outline
I. Child mortality (U5MR) and its causes
II. Essentials in the management of U5MR
III. Summary
Photo by Brett Nelson. No permission needed.
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I. Child mortality and its causes
Photo by Brett Nelson. No permission needed.
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Child mortality • 7.6 million children <5 each year (2010)
• ~half of these deaths in Africa
• 94% of these deaths in 60 countries
Image retrieved from Worldmapper.org. Creative Commons license associated: http://creativecommons.org/licenses/by/2.0. © Copyright SASI Group (University of Sheffield) and Mark Newman (University of Michigan)
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Child mortality
Image retrieved from Worldmapper.org. Creative Commons license associated: http://creativecommons.org/licenses/by/2.0. © Copyright SASI Group (University of Sheffield) and Mark Newman (University of Michigan)
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Public health spending
Image retrieved from Worldmapper.org. Creative Commons license associated: http://creativecommons.org/licenses/by/2.0. © Copyright SASI Group (University of Sheffield) and Mark Newman (University of Michigan)
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Physicians working
Image retrieved from Worldmapper.org. Creative Commons license associated: http://creativecommons.org/licenses/by/2.0. © Copyright SASI Group (University of Sheffield) and Mark Newman (University of Michigan)
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Child mortality by region
[ WHO figure of child mortality by region, available from WHO. Global Burden of Disease. 2004. ]
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Child mortality trend over time
[ WHO figure of child mortality over time. Available from WHO World Health Report. http://www.who.int/
whr/en/index.html ]
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Image from WHO. World Health Report, 2005. Image in public domain.
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Image from WHO. World Health Report, 2005. Image in public domain.
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Millennium Development Goals
Images from MDGs Campaign in Brazil. Images in public domain: http://www.worldvolunteerweb.org/mdgs.html.
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Millennium Development Goals
Images from MDGs Campaign in Brazil. Images in public domain: http://www.worldvolunteerweb.org/mdgs.html.
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UN MDG #4
• Most off-track of any MDG
• 91 countries likely won’t meet goal
• Many have had increased mortality
Reduce U5MR by 2/3 between 1990-2015
(from 93 to 31 of every 1,000 children)
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Causes of U5MR
WHO. The global burden of disease: 2004 update.
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Causes of U5MR
WHO. The global burden of disease: 2004 update.
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Causes of U5MR
WHO. The global burden of disease: 2004 update.
Malnutrition
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Causes of U5MR
1. Neonatal deaths
2. Acute respiratory infections (ARIs)
3. Diarrheal illnesses
4. Malaria
5. Measles
6. HIV/AIDS
+ Malnutrition WHO. The global burden of disease: 2004 update.
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II. Essentials in the management of U5MR
Photo by Brett Nelson. No permission needed.
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Neonatal mortality (#1)
Photo by Brett Nelson. No permission needed.
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Neonatal mortality
• Of nearly 9 million under-five deaths annually...
• Over 3 million occur within neonatal period
• Vast majority could be prevented with low-tech, low-cost interventions
• These numbers don’t include additional 3.3 million stillbirths
1. United Nations Children’s Fund (UNICEF). State of world children. 2005. 2. Neonatal Survival Series. Lancet. March 2005.
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Neonatal mortality
• In most of world, infant and under-five mortality rates have declined substantially in past 4 decades
• Neonatal mortality has declined less rapidly
• Neonatal deaths now account for 40-70% of all infant mortality
Department of International Health. Johns Hopkins Bloomberg School of Public Health. Reducing perinatal and neonatal mortality. http://ih.jhsph.edu/chr/fhacs/neonatal.ppt
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Infant mortality
Neonatal mortality
Infant and neonatal mortality in Ghana 1975-1995
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Causes of neonatal mortality
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Causes of neonatal mortality
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Neonatal mortality
• Simple preventive practices can save many!
• Existing interventions can prevent 35-55% neonatal deaths worldwide, including:
• Interventions for pregnant women
• Interventions for newborns
Bellagio, Lancet Survival Series
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Interventions for pregnant women
A. Tetanus toxoid immunization
B. Iron supplementation
C. Folate supplementation
D. Treatment of maternal malaria
E. Treatment of maternal syphilis
Photo by Brett Nelson. No permission needed.
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• Caused by Clostridium tetani
• G+, anaerobic bacterium w/ spores in soil and animal GI
• Spore inoculation occurs through dirty wounds
• Once inside, spores germinate and produce tetanospasmin (very potent neurotoxin)
• Tetanospasmin disseminates to nerves
• Toxin blocks inhibitory neurotransmitter release and causes unopposed muscle contraction
A. Tetanus
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• Shortest peripheral nerves are affected first
• facial distortion
• back and neck stiffness
• Autonomic nervous system may also be affected
• Seizures may occur
A. Tetanus: presentation
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Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=6374. Image in public domain.
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• Tetanus kills ~70,000 newborns in Africa each year
• 6% of all neonatal deaths
• Very hard to treat neonatal tetanus(!)
• Preventing disease by immunizing mothers critical
A. Tetanus: epidemiology
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• Can be prevented with tetanus-toxoid (TT)-containing vaccines
• Mothers should receive at least 2 TT vaccines during pregnancy
• Protects mother and her baby
• Also important to have clean care of umbilical cord
A. Tetanus: prevention
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• Iron-deficiency anemia affects ~50% of women
• Contributes significantly to maternal mortality, causes an estimated 10,000 deaths/year
• Maternal anemia also causes neonatal mortality
• Newborns more likely LBW, premature, or perinatal death
• Newborns also at greater risk for cognitive impairment
B. Iron supplementation
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• Folate supplements before and around conception can reduce neural tube defects by 72% (42-87%)
C. Folate supplementation
Image retrieved from http://www.cdc.gov/ncbddd/folicacid/recommendations.html. Image in public domain.
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• Malarial infection causes 400,000 cases/year of severe maternal anemia
• Causes 75,000-200,000 infant deaths/year
• Effects on fetus:
• Fetal loss, prematurity, IUGR, LBW
D. Treatment of maternal malaria
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Malaria-infected human placenta examined under microscope. Intervillous spaces (central area of picture) are filled with red blood cells, most of which are infected with Plasmodium falciparum
malaria parasites.
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• Insecticide-treated bed nets (ITNs):
• Provide to pregnant women as early in pregnancy as possible
• Encourage use throughout pregnancy and during postpartum period
D. Treatment of maternal malaria: ITNs
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• Intermittent preventive treatment of malaria
• Give IPT with each scheduled antenatal visit after quickening
• Goal of at least 2 doses, not more frequently than monthly
• Best drug is sulfadoxine-pyrimethamine (SP) because of safety during pregnancy, (16-36wks), effectiveness, and feasibility
D. Treatment of maternal malaria: IPT
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• STI caused by a spirochete, Treponema pallidum
• Can cause miscarriages, premature birth, still-birth, or death of newborn babies
• 40% of births to syphilitic mothers are stillborn
• 40-70% of surviving infants will be infected
• 12% of infected infants will subsequently die
E. Treatment of maternal syphilis
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• Systemic sx:
• FTT, fever, irritability
• Skeletal:
• no bridge to nose (saddle nose), Huthinson teeth, frontal bossing, saber shins
• Rashes:
• blisters (infectious) then lesions on palms and soles
• Other:
• severe congenital pneumonia, watery discharge from nose, blindness / clouding of cornea, decreased hearing or deafness
E. Treatment of maternal syphilis: s/sx
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Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=2246. Image in public domain.
Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=3510. Image in public domain.
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• One dose of penicillin will cure a mother who has had syphilis for <1 year
• More doses are needed to cure a mother who has had it for >1 year
• A baby born with syphilis needs daily penicillin treatment for 10 days
E. Treatment of maternal syphilis: rx
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Interventions for newborns
• Clean deliveries
• Newborn resuscitation
• Exclusive breastfeeding
• Kangaroo / skin-to-skin care
• Oral polio and BCG injections
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Neonatal resuscitation
• Most newborns will do well without assistance
• However, approximately 10% will need some intervention
• 13 million neonates worldwide every year
• Fortunately, simple and effective steps
American Heart Association, American Academy of Pediatrics. Pediatrics. 2006;117:e1029-e1038
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Warm, dry, bulb suction, stimulate
Add PPV if apnea or HR<100
Add compressions if HR<60 …
Neonatal resuscitation
Image courtesy of the American Academy of Pediatrics. Used with permission.
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Simple, cost-effective innovations
Image courtesy of Laerdal Medical. Used with permission.
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Acute respiratory infections (#2)
Covered in another lecture. Brief review.....
Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=580. Image in public domain.
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ARIs
• Leading cause of death in children 1-4yo
• 2 million deaths each year, nearly one in five child deaths globally
• Plus additional deaths in neonatal period
• ~60% of significant ARIs in developing world caused by bacteria
• Majority are viral in developed world
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Recognition of respiratory distress
Two major obstacles to reducing mortality from pneumonia is care-giver awareness of:
1) signs and symptoms of respiratory infection
2) when to seek medical attention
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Image retrieved from “Pneumonia, the forgotten killer,” UNICEF. Image in public domain.
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Pneumonia is a clinical diagnosis
• On auscultation:
• Crackles, decreased breath sounds, pleural rub, abnormal vocal resonance
• Suggested by the following:
• Cough
• Fever
• Respiratory distress (tachypnea, retractions, flaring, grunting)
[ WHO figure of child chest indrawing. Available at: https://apps.who.int/chd/
publications/referral_care/chap3/chap3fr.htm ]
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CXR needed abroad? • CXR usually not needed for diagnosis of
pneumonia (and infrequently available)
• CXR only recommended:
• Very severe pneumonia (to look for complications)
• After 2 days of treatment if condition has not improved or has gotten worse
• In cases of acute unexplained worsening
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Supplemental oxygen
• Assess oxygen saturation with pulse oximetry
• If available, give oxygen if SpO2 <90% or respiratory distress
Phillips Respironics Oxygen Concentrator. Image retrieved from http://en.wikipedia.org/wiki/Oxygen_concentrator. Image in public domain and used under a Creative Commons license.
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Diarrheal illnesses (#3)
Covered in another lecture.
Brief preview.....
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Scope of diarrheal illnesses
• In developing countries, children typically have 2-6 diarrheal illnesses each year
• ~2.2 million children under age 5 die each year (8,000 children/day)
• 1/20 children die before age 5
• Impaired nutrition, growth, development, fitness, cognitive, and school performance
• Susceptibility to other acute infections
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Differential diagnosis
[ WHO table: Table 11. Differential diagnosis of the child presenting with diarrhoea
(Page 111). WHO Pocket book of hospital care for children in resource-limited settings. Available at: Image retrieved from
http://whqlibdoc.who.int/publications/2005/9241546700.pdf ]
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Diarrhea: management
• Early replacement of fluid losses
• Oral rehydration solution (ORS)....
• Continue/increase feeding and breastfeeding
• Recognize signs of dehydration or other concerning symptoms
• Antibiotic use only when appropriate
• Zinc x10-14 days
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Oral rehydration solution (ORS)
• Sodium and glucose solution for management of acute diarrhea
• “Potentially the most important medical advance of this [20th] century” Water with sugar and salt [editorial]. Lancet 1978;2(8084):300-1.
[ Image of ORS sachet.
Available at: http://www.unicef.de/projekte/themen/nothilfe/nothilfe-
medizinische-versorgung/ ]
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Malaria (#4)
Covered in another lecture. Brief preview.....
Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=7862. Image in public domain.
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Malaria
• 1.5 billion live in endemic areas
• Over 500 million infected annually
• 1-2 million deaths annually
[ Image: world map of malarial infections. Available at: http://www.cdc.gov/malaria/
malaria_worldwide/impact.html ]
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Malaria
• Caused by protozoa in Plasmodium genus:
• P. facliparum, vivax, ovale, malariae, knowlesi
• Transmitted by female Anopheles mosquito
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Plasmodium life cycle
Image retrieved from http://dpd.cdc.gov/dpdx/html/Malaria.htm. Image in public domain.
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Malaria presentation • Systemic symptoms
• Malaise, headache, chills, emesis, fever
• Severe malaria • Prostration, shock, metabolic acidosis
• Hypoglycemia
• Severe anemia, jaundice, hepatosplenomegaly
• Organ failure (pulmonary edema, hemoglobinuria, etc)
• Cerebral malaria
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Malaria diagnosis
• Clinical diagnosis not always accurate
• But may treat empirically, esp children in high-endemic areas
• Thick and thin blood smears
• Rapid tests also available
Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=5905. Image in public domain.
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Malaria treatment • Varies by region, but commonly....
• Chloroquine: first-line agent for all non-falcip malaria and for non-severe falcip in parts of Africa
• Artemesinins: very effective against all (x3 days in combo or x6 days alone)
• Quinine: for severe falcip
• Blood transfusion prn and other supportive care
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Measles (#5)
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Measles
• RNA myxovirus
• Spread via respiratory droplets
• Attack rate 90%
• 30-40 million cases annually
• 242,000 deaths in 2006
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Measles presentation
• Incubation: 14 days
• Fever + three C’s: • Cough, Coryza,
Conjunctivitis
• [C]Koplik spots
• Malaise (very miserable)
• Rash: head-toe spread
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Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=3187. Image in public domain.
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Image retrieved from http://phil.cdc.gov/phil/details.asp?pid=6571. Image in public domain.
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Measles mortality
• Developed countries: 0.02%
• West Africa: 12%
• Displaced populations: up to 30%
• Risk factors: overcrowding, poor nutrition, Vit A deficiency, lack of immunization, immunocompromised
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Measles vaccine coverage
[ Image: map of measles vaccine coverage. Available at: http://www.who.int/immunization_monitoring/diseases/
big_measles_map_coverage.jpg ]
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Measles treatment • Supportive care
• Antipyretics, hydration, isolation
• Vitamin A
• 0-6 months: 50,000 IU x1
• 6-12 months: 100,000 IU x1
• >12 months: 200,000 IU x1
• If eye complications: 200,000 IU daily x2
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Malnutrition
Covered in another lecture.....
Photo by Brett Nelson. No permission needed.
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Summary (1)
• Nearly 8 million children die each year
• Leading causes of child mortality:
• Neonatal mortality, ARIs, diarrheal illnesses, malaria, measles, HIV/AIDS
• Malnutrition contributes to >50%
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Summary (2)
• Neonatal mortality is a huge component of childhood mortality, particularly in developing world
• Most common causes are infections, asphyxia, and prematurity
• Simple, inexpensive interventions are currently available and remarkably effective
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References • Black RE, Morris SS, Bryce J. Where and why are 10 million children dying every year? Lancet 2003; 361:2226-34.
• International Rescue Committee. Mortality and morbidity in the Democratic Republic of Congo, 2002.
• Mills EJ, Singh S, Nelson BD, Nachega JB. The impact of conflict on HIV/AIDS in Africa. International Journal of STD & AIDS. 2006; 17(11):713-717.
• Williams BG, Gouws E, Boschi-Pinto C, Bryce J, Dye C. Estimates of world-wide distribution of child deaths from acute respiratory infections. Lancet Infect Dis 2002;2:25-32.
• WHO programme for the control of acute respiratory infections. Technical basis for the WHO recommendations on the management of pneumonia in children at first level health facilities. WHO/ARI/91.20. Geneva: WHO, 1991.
• Unicef and WHO. Reduced osmolarity oral rehydration salts (ORS) formulation: A report from a meeting of experts jointly organised by UNICEF and WHO. Unicef House, New York, USA, 18 July 2001.
• S.K. Hahn, Y.J. Kim, P. Garner. Reduced osmolarity oral rehydration solution for treating dehydration due to diarrhoea in children: systematic review. BMJ 2001, 323:81-5.
• USAID. Diarrhoea treatment guidelines including new recommendations for the use of ORS and zinc supplementation for clinic-based healthcare workers. 2005. www.eddcontrol.org/files/Diarrhoea_Treatment_guidelines_USAID.pdf
• WHO. The treatment of diarrhoea: A manual for physicians and other senior health workers. 2005. http://www.eddcontrol.org/files/Treatment_of_Diarrhoea_manual_WHO.pdf
• Sasson M, Shvartzman P. Hypodermoclysis: An Alternative Infusion Technique. American Family Physician 2001;64:1575-8.
• WHO. Pocket Book of Hospital Care for Children. http://www.who.int/child_adolescent_health/documents/9241546700/en/index.html