travel medicine and travel vaccination
DESCRIPTION
TRAVEL MEDICINE AND TRAVEL VACCINATION. MUDr. RNDr. František Stejskal, Ph.D. 5th year, April 18, 2012 1st Faculty of Medicine Hospital Bulovka Email: fstej @ lf1.cuni.cz. TRAVEL MEDICINE. Recommandation before travel to tropical countries Compulsary and recommended vaccination - PowerPoint PPT PresentationTRANSCRIPT
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TRAVEL MEDICINE AND TRAVEL VACCINATION
MUDr. RNDr. František Stejskal, Ph.D.
5th year, April 18, 2012
1st Faculty of Medicine Hospital Bulovka
Email: [email protected]
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TRAVEL MEDICINE
• Recommandation before travel to tropical countries– Compulsary and recommended vaccination– Antimalarial prophylaxis– Mosquito nets, repelents, insecticides– Prophylaxis of travel diarrhea– Other medical and health riscs– Travel pharmacy
• Investigation of patients after returning from tropics
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• Centers of travel medicine
• Departments of hygiene and epidemiology
• Deprtments of infectious diseases
• Departments of working medicine
• GPs
WHO IS VACCINATING?
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HEALTH PROBLEMS AFTER 1 MONTH STAY IN TROPICS
100%
1%
10%
0.1%
0.01%
0.0001%
0.001% 1
100
1000
10 000
100 000
10
Malaria (W. Africa, w/o proph.)
Acute respiratory infections
Hepatitis A
GonorrheaAnimal bites w. rabies risc
Typhoid fever (Indian Subcont.)
HIV infection
Typhoid fever (other regions)
Legionella
Cholera
Poliomyelitis
Meningococcal infection
Any health problem
Subjectively ill feltPhysicion consulted
Steyed in bed
Incapacity of work after ret.
Stayed in hospital
Air evacuation
Died abrod (chronicly ill)
Died abrod (healthy)
Hepatitis B
Dengue (S.E. Asia)
Travel diarrhea
ETEC diarrhea
30 - 80%
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TRAVEL VACCINATION
• REQUARED (COMPULSARY)– Yellow fever
– Meningococcal meningitis, (Cholera)
• REGULAR– Tetanus, Pertusis, Poliomyelitis, Diphteria
• RECOMMANDED– Hepatitis A, B, Typhoid fever, Meningococcal
meningitis, Rabies, Japanese B Encephalitis
• SPECIAL– Influenza, Pneumococcus, TBE
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GENERAL CONTRAINDICATIONS OF VACCINATION
• Acute febrile disease
• Active infectious, tumor, autoimmune or other systemic disease
• Treatment with immunosupressive drugs (cytostatics, glucocorticoids, interferons)
• Alergic reaction to the previous vaccination
ADVERSE EFFECTS OF VACCINATION
• Local reaction (pain, erythema in the aplication site)
• General signs: featigue, head pain, muscle, joints pain, fever – increased body temperature
• Alergic reaction – exanthema, cought, dyspnoe
• Anaphylactic reaction (cave i.v. aplication!)
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REQUARED TRAVEL VACCINATION
• Yellow fever
• Meningococcal
meningitis
• Cholera
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YELLOW FEVER DISRIBUTION
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ŽLUTÁ ZIMNICE - ROZŠÍŘENÍ
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ŽLUTÁ ZIMNICE - ROZŠÍŘENÍ
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YELLOW FEVER VACCINE• STAMARIL (Aventis-Pasteur)• Live, attenuated strain 17D cultured on the chick embryo (contains agg
proteins (albumine – cave alergy!), developed in the 30-ties of 20 centure• Lyophilized vaccine – aplication during 1 hour after dissolution - 0,5 ml s.c.• Effective 10 days after application and for 10 years• Aplikovat min. 4 týdny po jiné živé atenuované vakcíně, odstup minimálně 2
týdny, jestliže YF předchází jiné živé vakcíně• Application together with polysaccharide typhoid Vi vaccine increases
antibody production against YF• Contraindications: pregnancy, immunosupression (HIV < 400 CD4), allergy
to the egg proteins, neomycine, polymyxine, children under 6 – 9 months• Side effects: local (pain at the application site); general (muscle pain,
headache, flu-like symptoms 5-12 days after application, mild hepatitis)• Indication: Tropical Africa and America; travellers from endemic regions to
Asia, America, Meditteranien • Application is noticed to the International Certificate of Vaccination
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INTERNATIONAL CERTIFICATE OF VACCINATION
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YELLOW FEVER
18 MAY 2008
29 MAY 2008
18 MAY 2018STAMARIL
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Yellow Fever - Complications
SEVERE VISCEROTROPIC COMPLICATIONS ASSOCIATED WITH VACCINATION OF ELDERLY PERSONS (over 60 years)
• 36 cases recorded (5 cases per 1 million vaccinated) since 1996 • Isolated virus of YF genetically identical with vaccination 17D strain• 2 – 8 days after vaccination; risc factors:
– Age over 60 years (20 cases per million vaccinated)– Thymectomy 2 – 20 years before vaccination) or thymoma in history
• Many cases with fever, elevation of LFT and renal dysfunction
SEVERE NEUROLOGIC COMPLICATIONS
• 28 cases recorded (4 cases per 1 million vaccinated) • 4 – 28 days after vaccination: headache, fever• Risc factors :
– Higher age; first application
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MENINGITIS BELT IN AFRICA
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MENINGOCCOCAL MENINGITIS
Tetravalent conjugated vaccine: A, C, Y, W135 (MENVEO, Novartis)• Recommended for travellers and in endemic countries• Effective for 10 years, childern over 11 years
Tetravalent polysachride vaccine: A, C, Y, W135 (MENOMUNE, Aventis)• Recquired for travellers to Mecca and Medina• Limited availability in Europe (30-50 €), effective for 3 years• Used during epidemics in Africa
MENINGOCOCCAL VACCINE A + C (Aventis); MENCEVAX A+C (SKB)• Inactivated bivalent polysacharide vaccine• Childern over 2 years, 1 dose, 0.5 ml s.c.; effective 10–14 days after application for 3
years
New conjugated vaccines: against type C– NeisVac-C – polysaccharide C conjugated with tetanic toxoid (Aventis)– Meningitec – conjugated with diphteric toxoid (Weith)– Menomune– Menjugate – conjugated with diphteric toxoid (Chiron)
• Not used in travellers to tropics, where epidemic type A dominate• Effective at least for 8 years, application at childern under 1 year possible
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CHOLERA DISRIBUTION
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CHOLERA
• Not requiered by WHO
• Some countries may requiere (Tanzania, Kenia, Egypt, Saudy Arabi – travelers to Mekka a Medina)
• Inactivated, parenteral vaccines no more recommended (low effectivity, severe side effects)
• New oral vaccines for persons over 2 years– ORACHOL (MUTACHOL), Berna – live, attenuated
• Minimal effectivity 80%, cover for 6 mo after 1 dose
• DUKORAL (distribuce Behringer-Chiron): inaktivovaná, buněčná + rekombinantní beta podjednotka cholerového toxinu
– DUCORAL (Chiron) – inactivated, Vibrias + recombinant beta subunit of cholera toxine
• 2 doses (in the U.S.A. 3 doses) with 1-6 weeks interval
• after 2 doses cover for 1-2 years against cholera (protection of 85% at 6 mo and 50% at 3 years);
• 6 months protection against enterotoxic E. coli strains travel diarrhea (2,2 – 6 % of protection after recent studies)
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EPIDEMICS OF CHOLERA IN WEST AFRICA IN 2005
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HEPATITIS A HIGH RISC AREAS
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HEPATITIS A
• Hepatitis A– Inactivated– 2 doses of 0.5 ml s.c. in the interval of 6 to 18
months, protection 2 weeks after first dose – Immunity minimal for 20 years, probably life-long
• HAVRIX (SKB)• AVAXIM (Aventis)• VAQTA (Merck)• EPAXAL (Berna)
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HEPATITIS B HIGH RISC AREAS
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HEPATITIS B VACCINES
• Hepatitis B– rekombinant HBsAg – Long-life immunity after 3 doses (0, 1, 6
months)• ENGERIX-B (SKB)• RECOMBIVAX (MSD)
• Combine hepatitis A + B vaccine– TWINRIX (SKB) – 3 doses (0, 1, 6 months)
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TYPHOID FEVER VACCINES
• Whole-cell inactivated parenteral vaccines are not more used – severe side effects, low effectivity
• TYPHIM Vi (Aventis), TYPHERIX (SKB)– Inactivated polysacharide vaccine S.typhi Ty2; for persons older than 2
years– 1 dose, 0.5 ml i.m. or deep s.c. application, effective 1 - 2 weeks after
vaccination– Immunity for 2 – 3 years (protection 60 - 80 %); booster after 3 years (at
high risc after 1-2 years)– Well tolerated, around 1 % of side effects
• VIVOTIF (Berna), TYPHORAL L (Chiron)– Oral live attenuoated vaccine S.typhi Ty21a– 3-4 capseln every other day 1 hour before meal; liquid form for childern of
2 – 6 years– Effective 7 days after last dose– Immunity last for 1 - 3 years; (5 years after 4 doses)– Do not combine with mefloquine, antibiotics, chemotherapeutics
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TYPHOID FEVER IMPORTED TO THE EUROPE
Rok 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006
6 5 5 1 1 0 1 1 2 4 3 6
Number of notified cases of the typhoid fever to the CZ (CEM):
• TRENDS: Decreased number of imported cases to the Europe:– Indian subcontinent dominates – Decrease of cases from northern Africa and Peru
• Vaccination has 60-80% effectivity
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JAPANESE B ENCEPHALITIS DISRIBUTION
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JAPANESE B ENCEPHALITIS VACCINE
• JE-VAX (Biken, Japonsko) – limited availability in Europe• Inactivated, purified virus cultured in mice brain (Nakayama
strain)
• Application of 1 ml (childern of 1 – 3 years old 0.5 ml) s.c.• Schema: 0, 7, 14 or 0, 7, 28 day, effective after 2nd dose
(91% effectivity)• Booster after 1 - 2 years and then every 3 years• Up to 20% side effects:
– Local: 1 – 31% (everage 20%); pain, erythema, oedema– General: 10%; fever, headache, rash; encephalopaty (1:2,3 mil.)
• Indication: India, China, S.E. Asia; stay for more than 1 month in the forestery regions in rainy season
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LYSSA = RABIES
• Etiology: Lyssavirus ssRNA- , 6 „strains“
• Pre-expose prophylaxis 3 doses– VERORAB (Pasteur)– RABIPUR, RABAVERT (Chiron)
• After bitening with a risk of infection:– Imunne globulin + – 3 doses of vaccine
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HUMAN RABIES IN ASIA IN 2001
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Rabies at animals in the CZ in 1990
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Rabies at animals IIRabies at animals in the CZ in 1996
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Rabies at animals in the CZ in 1999
The last case at wild animals (exception of bats) was detected in the 2002
The Czech Republic is rabies free
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VZTEKLINA U ZVÍŘAT V EVROPĚ: 2010
http://www.who-rabies-bulletin.org
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RABIES IN WILD ANIMALS IN EUROPE
• Lyssavirus: ssRNA-, 6 „strains“
• Vaccines:
– VERORAB (Pasteur)
– RABIPUR, RABAVERT (Chiron)
• Pre-expossition prophylaxis: 3 doses (0., 7., 21. or 28. day)
• Booster after 1 year and than every 3 years
• After bitting with a risk of infection (non-vaccinated):
– Immune globulin (horse or human) + 5 doses of vaccine
• After bitting with a risk of infection (vaccinated):
– 0. a 3. day (immune serum is not used)
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Vzteklina u zvířat – Polsko 2010
http://www.who-rabies-bulletin.org
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Vzteklina u zvířat – Itálie 2010
http://www.who-rabies-bulletin.org
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POLIOMYELITIS
• Current epidemiological situation in Africa:– 19.10.2006 – 1 case (type A) imported from Somalien to the north Kenya
(in Somalien 216 cases since 6/2005 (virus originated in Nigerien)
– 37 cases in Ethiopia since 12/2004
– 34 suspected cases of polio in Namibia around capital Windhoek (last cases in 1996), imported from Angola
• Polio Sabin – oral live attenuated vaccine (OPV): 2 drops• Imovax Polio – inactivated parenteral vaccine (IPV)
- primary immunisation from 2 months of age:3 doses in the interval of 1-2 months
i.m.booster 1 year after 3rd dose
- nonimmune adults (over 18 years – not use OPV): 2 doses in the interval of 1-2 months booster 12 months after 2nd dose)
• Booster at adults traveling to Africa and Asia every 10 years
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Současná epidemiologická situace poliomyelitidy ve světě
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REGULAR VACCINATION IN TRAVELERS
• Tetanus, pertusis, diphteria
• Poliomyelitis
• Measles, parotitis (mumps), rubella (MMR)
• Hepatitis B
• Haemophilus influenzae B conjugated vaccine
• Meningococcal C conjugated vaccine
• Varicella (chickenpox) – USA, Japan
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PERTUSIS
• Whole-cell, inactivated, parenteral vaccine – side effects • Acellular – detoxicated pertussis toxin• Adult persons are not vaccinated (side effects), but may
represent the source of infection
TETANUS
• Revaccination in the Czech Republic every 10 - 15 years
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DIPHTERIA
Vaccination of adults:• Diphteric anatoxin:Absorbed Diphteria adult (Diphterie – Adsorbat –
Impfstoff Behring fur Erwachsene) – persons older than 6 years
Td-pur = (diphteria + tetanus) for adult person• Booster at adult travellers over 30 - 40 years
travelling to regions with pertusis (tropics, Ukrainien, Russia)
• Booster in persons in contact with refugies from endemic countries
• Revaccination every 10 years – 1 dose i.m.
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INCREASED RISC OF TUBERCULOSIS
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TUBERCULOSIS VACCINES
• Recommanded for routine vaccination by WHO• Regullar universal vaccination in the Cz, Slovakia, Finland• In the EC countries at persons in the risc• BCG vaccination recommended for long stay in tropics• USA do not vaccinate → tuberculin i.d. test is used for diagnostics
of tuberculosis
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• Influenza
• Tick borne encephalitis (TBE)– FSME Immun.
– ENCEPUR, ENCEPUR K
– 0, 1-3, 9-12 mo, booster every 3 - 5 years
SPECIAL VACCINATION IN TRAVELLERS
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RESISTANCE OF MALARIC PLASMODIA
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IIVI
II
II
II (I)
IV
(I) II
III
IV IV
BALI I
II (I)III
IV
I
CHEMOPROFYLAXE MALÁRIE A ZÓNY WHO, 2009
I – bez chemoprofylaxe
II – chlorochin
III – chlorochin + proguanil
IV – meflochin, Malarone (A/P), doxycyklin
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• Zone II:– Central Amerika, Haiti, Dominican Republic– chloroquine (PLAQUENIL, 150 mg tbl.) – 2 tbl weekly
• Start 1 week before departure continue 4 weeks after returning
• ZoneIII:– India, Sri Lanca– Chloroguine + proguanil (PALUDRINE)
• proguanil: 2 tbl daily• Start 1 week before departure continue 4 weeks after returning
• Zone IV:– Tropical Africa, South America, SE Asia, Oceania– mefloquine (LARIAM) – 1 tbl weekly
• Start 1 week before departure continue 4 weeks after returning– atovaquon + proguanil (MALARONE) - 1 tbl daily
• Start 1 day before departure continue 7 days after returning– Doxycykline 100 mg tbl./day - 1 week before - 4 weeks after
ANTIMALARIAL PROFYLAXIS