influenza: back to the future, it never gets old › ... › influenza2018.pdfflu : the story of the...
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Jack M. Bernstein, M.D. Emeritus Professor, Wright State University
Influenza: Back to the Future, it never gets old
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“If the epidemic continues its mathematical rate of
acceleration, civilization could easily disappear from
the face of the earth.”
The Army Surgeon General
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The 1918 “Spanish flu”
•Started in the U.S. during March.
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Course of Untreated Influenza
Small PA Jr Hospital Practice 1990
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•By December there had been 200 - 1000 million cases which killed more than 25 million people worldwide
•550,000 deaths within the US (20,000 in NYC; 11,000 in Philadelphia in one month)
•389,000 deaths in Japan.
•60% of the Alaskan Eskimo population died (100% mortality in some villages)
•25% of the Samoan population died.
•The strain (H1N1) was so virulent that many people died within hours of symptom onset.
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Flu as
zoonoses
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Novel Influenza A (H1N1)pdm09) A(H1N1)pdm09 A (H3N2) A (H3N2)
A(H1N1)pdm09 A (H3N2)
A(H1N1)pdm09
2009
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The Faces of Flu
Married. Works for
EPA in Columbus.
Married. Pediatric
social worker in
Cleveland.
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Bernstein Family Viral Cultures
Joshua Rebecca Jonathan
1986 Flu A
1988 Flu A/H3
Flu B
1989 Flu A/H1 Flu A/H1
+Flu B
1991 Flu B (2/91)
Flu A (12/91)
Para 2 (11/91)
Fourth beer
book coming out
soon. Married
with a 4 year old
daughter
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Influenza A In Young Adults (Taken from Kilbourne: Influenza, 1987, p159)
headache
cough, fever, prostration
Productive cough (sputum)
substernal pain
sore throat
myalgia, conjuctival injection
sudden onset, nasal discharge, pharyngeal injection
% <10 <20 <30 <40 <50 <60 <70 <80 <90 100
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Shedding of Influenza A in Volunteer
Adapted from Mandell GL, Bennett JE, Dolin R, eds. Mandell, Douglas and Bennett’s Principles
and Practice of Infectious Disease. 4th ed. 1995:1554.
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Synergy Health Care, Inc. data, data on file, Outcomes Management, Roche Laboratories. Slide 5.
Secondary Complications of Influenza
Sinusitis Bronchitis Otitis Media Pneumonia Rhinitis
Co
mp
lica
tio
ns/1
,00
0 E
ve
nts
30
27
22
18
9
Southwestern US Health Plan Study, October 1994-
September 1996
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Inactivated Influenza Virus Vaccine
Content Updated yearly to protect against anticipated strains, consists of type A (2) and type B (1)
Process Grown in embryonated chicken eggs and formalin inactivated
MMWR. 1999;48:4-5.
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MMWR. 1999;48:4.
Efficacy of the Influenza Vaccine
• Most effective (70%-90%) in preventing illness in persons aged <65 yrs
• 30%-70% in preventing P/I hospitalization in elderly not in chronic care facility
• 30%-40% in preventing illness in frail elderly
• 50%-60% in preventing P/I hospitalization in nursing home elderly
• 80% in preventing death in nursing home elderly
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Relation between Influenza Vaccination and Outpatient Visits, Hospitalization, and
Mortality in Elderly Persons with Chronic Lung Disease. Nichol KL, Baken L, Nelson A.
Ann Intern Med. 1999;130:397-403.
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N Engl J Med 2001; 344:889-96
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Conclusions
The effect of influenza on mortality is much greater in Japan than in the United
States and can be measured about equally well in terms of deaths from all causes
and deaths attributed to pneumonia or influenza. Vaccinating schoolchildren against
influenza provides protection and reduces mortality from influenza among older
persons. (N Engl J Med 2001; 344:889-96.)
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CDC Recommendations: Who Should Receive Influenza Vaccine?
• Persons at increased risk (age 6 mos)
• Hospital and outpatient employees
• Nursing home employees with patient contact
• Home health care providers working with high-risk persons
• Household members of high-risk persons
• Persons desiring to avoid influenza infection MMWR. 1999;48:5-7.
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Composition of the 2017-18 InfluenzaVaccine
• A/Michigan/45/2015 (H1N1)pdm09-like virus (updated) • A/Hong Kong/4801/2014 (H3N2)-like virus • B/Brisbane/60/2008-like (B/Victoria lineage) virus
Four component vaccines are recommended to include the same three viruses above, plus B/Phuket/3073/2013-like virus (B/Yamagata lineage).
• Standard dose flu shots.
• A high-dose shot for people 65 and older.
• A shot made with adjuvant for people 65 and older.
Live attenuated influenza vaccine (LAIV) – or the nasal spray vaccine – is
not recommended
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Antiviral Therapy
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Influenza: Mechanisms and Targets
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Previously available medications for
influenza
(THAT HAVE EFFICACY)
ADAMANTADINES
•Amantadine (Symmetral®)
•Originally utilized for Parkinson’s
•Prophylactic and therapeutic efficacy
•Problems with CNS toxicity
•Rimantadine (Flumadine®)
•Same as amantadine but less CNS toxicity
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Problem:
100% of seasonal H3N2
and 2009 pandemic flu
samples tested showed
resistance to rimantadine
and it is no longer
recommended for
treatment of influenza A.
Adamantines: How and Why?
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Fri 1/28/00 Becky: “just thought i would write you and tell you
that i am feeling tons better. dad that medicine was a wonder
drug. i was feeling better by wed. night. now all i have is a
stuffy nose but that can't be helped.”
Amantadine Therapy….. 2000
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Neuraminidase Inhibition
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The Search for Influenza Neuraminidase Inhibitors
Wade RC. Structure. 1997;5:1140. Zanamivir
(1980)
random screening
mechanism-
Based design structure-based
design
(1983)
oseltamivir
(1996)
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Neuraminidase Therapy 2001
• Jon came home from Bob Evans on 20 Jan c/o sore throat, backache and chills. Temp 101.5 F. Duration sx <6 h.
• Started on neuraminidase inhibitor therapy immediately. Afebrile by morning 21 Jan. Back at work and school
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Efficacy and safety of the oral neuraminidase
inhibitor oseltamivir in treating acute influenza:
A randomized controlled trial.
Treanor JJ, Hayden FG, Vrooman PS, Barbarash R, Bettis R, Riff D, Singh S, Kinnersley N,
Ward P, Mills RG.
JAMA 2000 Feb 23;283(8):1016-24.
Reduced illness duration (76.3 h & 74.3 h for 75 mg and 150 mg, respectively, vs 97.0 h for placebo; P = .004
Reduced illness severity (686 score-hours and 629 score-hours for 75 mg and 150 mg, respectively, vs 887 score-hours for placebo; P < .001 for both comparisons).
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Resistance to Neuraminidase Inhibitor
January - April, 2012, 16 oseltamivir-resistant 2009 H1N1 viruses were detected
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Oseltamivir Resistance during Treatment of
Influenza A (H5N1) Infection
de Jong, Menno D. et al. N Engl J Med 2005; 353:2667-2672
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Traditional Herbal Medicine
Numerous reports of the anti-influenza activity of medicinal plant extracts and
plant products
Korrossy-Horwood et al. (P-458) Glycyrrhizin from licorice roots
Tsai et al. (P-450) Platform to screen Chinese herbal medicines
Ehrhardt et al. (O-871) Cystus052, a polypenol-rich extract from pink rockrose
Plant polyphenols possess ant-influenza activity:
Anti-influenza activity of resveratrol from red grapes:
Improved survival and reduced lung titers in infected mice
(Palamara et al. J.Infect. Dis.191,1719–1729)
Epigallocatechin-3-gallate and theaflavindigallate from green tea:
Unspecific binding of the HA and agglutination of virus particles
(Nakayama et al.; Antiviral Res. 21,289–299)
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Influenza viruses are important pathogens for humans and the discovery of
novel anti-influenza drugs with low toxicity deserves great efforts. Fullerenes have attracted considerable attention in different fields of sciences including antiviral activity. We synthesized a fullerene-liposome incorporated compound and investigated its antiviral activity on influenza virus infection in a mouse model. The results showed that fullerene-liposome could reduce mean pulmonary virus yields, decrease the lung index and eventually significantly prolong mean time to death (MTD) and decrease mortality of H1N1 virus-infected mice. Our data indicated that fullerene-liposome has the anti-influenza activity in vivo at much lower concentrations as compared to the Rimantadine, and then reveals that fullerene-liposome is a promising agent in the clinical therapy of influenza infection with favorable water-solubility and low toxicity.
Chun-Xian Du1, Hai-Rong Xiong, Hong Ji, Qiang Liu, Hong Xiao and Zhan-
Qiu Yang The antiviral effect of fullerene-liposome complex against
influenza virus (H1N1) in vivo. Scientific Research and Essays Vol. 7(6),
pp. 706-711, 16 February, 2012
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Flu : The Story of the Great Influenza Pandemic of
1918 and the Search for the Virus That Caused It
by Gina Bari Kolata
Feeling tired, achy, and congested? You'll hope not after reading
science writer Gina Kolata's engrossing Flu, a fascinating look at the 1918
epidemic that wiped out around 40 million people in less than a year and
afflicted more than one of every four Americans. This tragedy, just on the
heels of World War I and far more deadly, so traumatized the survivors that
few would talk about it afterward. Kolata reports on the scientific
investigation of this bizarre outbreak, in particular the attempts to sequence
the virus' DNA from tissue samples of victims. She also looks at the social
and personal effects of the disease, from improved public health awareness
to the loss of productivity. (The disease affected 20- to 40-year-olds
disproportionately.)
How could this disease, now almost trivial to healthy young
people, have become so virulent? The answer is complex, invoking
epidemiology, immunology, and even psychology, but Kolata cuts a swath
through medical papers and statistical reports to tell a story of an out-of-
control virus exploiting an exhausted world on the brink of transition into
modern society. Through letters, interviews, and news reports, she pieces
together a cautionary tale that captures the horror of a devastating illness.
Research marches onward, but we're still at the mercy of something as
simple as the flu. --Rob Lightner
Wed 1/26/00
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New York Times 3 Feb. 1999
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