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Transcript of Double Trouble: Diabetes and Tuberculosis Kris Ernst, BSN, RN, CDE Division of Diabetes Translation...
![Page 1: Double Trouble: Diabetes and Tuberculosis Kris Ernst, BSN, RN, CDE Division of Diabetes Translation Centers for Disease Control and Prevention.](https://reader030.fdocuments.net/reader030/viewer/2022032523/56649d8b5503460f94a72084/html5/thumbnails/1.jpg)
Double Trouble:Diabetes and Tuberculosis
Kris Ernst, BSN, RN, CDEDivision of Diabetes Translation
Centers for Disease Control and Prevention
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Disclaimer
This presentation represents the opinion of the author and is not the
official opinion of CDC
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Tuberculosis and Diabetes:Old Foes
• Indian physician Susruta, in 600 A.D.“phthisis frequently complicated diabetes”
• Autopsy of diabetics in 1883 showed presence of TB granuloma I 50% of diabetics
• Prior to the insulin era: Diagnosis of DM was a death sentence– Leading cause of death was: Tuberculosis
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Definitions
• Latent Tuberculosis Infection (LTBI)– Persons are infected with M. tuberculosis, but do
not have active TB disease.
• Active TB Disease– Persons infected with M tuberculosis bacteria that
progress from latent TB infection.
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Background
• Diabetes increases risk for progression from latent TB infection (LTBI) to active TB disease and complicates treatment of active TB
• Delays in diagnosis for both diabetes and TB• Globally, the number of people with diabetes
is increasing
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Number (in Millions) of Persons with Diagnosed Diabetes, United States, 1980–2007
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Background
• Pathophysiology – diabetes, especially when poorly-controlled, causes relative immunocompromise and increases likelihood of reactivation of TB
• Epidemiology – dramatic increase of diabetes• Demographics – diabetes disproportionately
affects lower socioeconomic groups and ethnic minorities that also have higher prevalence of TB
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Background
• Treatment considerations – hard to treat TB in the face of poor glucose control
• Hidden epidemic – estimated that ¼ of people with diabetes don’t know they have it
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TB Case Rates,* United States, 2008
< 3.5 (year 2000 target)3.6–4.2
> 4.2 (national average)
D.C.
*Cases per 100,000.
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Reported TB Cases by Age Group, United States, 2008
25–44 yrs (33%)
<15 yrs(6%)
15–24 yrs(11%)
45–64 yrs (30%)
>65 yrs (19%)
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0
10
20
30
40
50
1993 1996 1999 2002 2005 2008
TB Case Rates by Race/Ethnicity* United States, 1993–2008**
Cas
es p
er 1
00,0
00
WhiteBlack or African-AmericanHispanic
American Indian/Alaska NativeAsian/Pacific Islander
*All races are non-Hispanic. In 2003, Asian/Pacific Islander category includes persons who reported race as Asian only and/or Native Hawaiian or Other Pacific Islander only.**Updated as of May 20, 2009.
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Reported TB Cases by Race/Ethnicity* United States, 2008
Hispanic or Latino(29%) Black or
African-American(25%)
Asian(26%)
White(17%)
American Indian or Alaska Native (1%)
Native Hawaiian orOther Pacific Islander (<1%)
*All races are non-Hispanic. Persons reporting two or more races accounted for less than 1% of all cases.
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Reported TB Cases* United States, 1982–2008
10,000
12,000
14,000
16,000
18,000
20,000
22,000
24,000
26,000
28,000
1984 1987 1990 1993 1996 1999 2002 2005 2008
Year
No.
of C
ases
*Updated as of May 20, 2009.
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TB MorbidityUnited States, 2003–2008
Year No. Rate*
2003 14,836 5.12004 14,500 4.92005 14,067 4.72006 13,727 4.62007 13,288 4.42008 12,904 4.2
*Cases per 100,000, updated as of May 20, 2009.
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Transmission of M. tuberculosis
• Spread by airborne route; droplet nuclei• Transmission affected by
– Infectiousness of patient– Environmental conditions– Duration of exposure
• Most exposed persons do not become infected
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TB Pathogenesis (1)Latent TB Infection
• Once inhaled, bacteria travel to lung alveoli and establish infection
• 2–12 wks after infection, immune response limits activity; infection is detectable
• Some bacteria survive and remain dormant but viable for years (latent TB infection, or LTBI)
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TB Pathogenesis (2)Latent TB Infection
• Persons with LTBI are– Asymptomatic– Not infectious
• LTBI formerly diagnosed only with TST• Now QFT-G can be used
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Anergy• Anergy is the immune system’s failure to respond
to injected reagents or antigens• Persons with compromised immunity may not
react to tuberculin• A few persons with normal immunity also do not
react• Thus, absence of TST reaction does not rule out
LTBI or TB disease• Anergy testing not recommended as adjunct to
TST, because TST results alone cannot guide clinical decision making
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What’s New
• QuantiFERON-TB Gold test (QFT-G)• QFT-G is a type of blood assay for M. tuberculosis
(BAMT)– Measures the patient’s immune system reaction to M.
tuberculosis– Blood samples must be processed within 12 hours– Interpretation of QFT-G results is influenced by the
patient’s risk for infection with M. tuberculosis– An alternative to TST
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Clinical Diagnosis• Obtain medical history and physical exam• Place patients with suspected or known
infectious TB disease under AII precautions until determined to be noninfectious
• Evaluate persons with extrapulmonary TB for concurrent pulmonary TB disease
• Although normally not infectious, children should be evaluated for infectiousness
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Diagnosis of Latent TB Infection• Persons with LTBI
– Are asymptomatic– Do not feel sick– Cannot spread TB to others
• Diagnostic procedures– Positive TST with medical evaluation to exclude TB
• Evaluation includes assessing symptoms and signs, x-ray, and sputum tests
– Blood assay for M. tuberculosis (BAMT) now available
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Treatment for LTBI• Treating LTBI reduces the risk that M. tuberculosis
infection will develop into TB disease• Certain groups have higher risk for developing TB
disease after infection; should be treated• Before beginning treatment for LTBI
– Exclude diagnosis of TB– Ensure patient has no history of adverse reactions
resulting from prior LTBI treatment
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Candidates for Treatment for LTBI Give LTBI Treatment to
If M. tuberculosis Test Result Is
Highest risk groups
• Immunocompromised
• Recent contacts
• X-ray indicates previous TB
≥5 mm
Other high-risk groups ≥10 mm
Patients with no risks ≥15 mm
The frequency of TB testing for HCWs will be determined by the risk classification for the setting.
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TB Patient Characteristics That Increase Risk for Infectiousness (1)
• Coughing• Undergoing cough-inducing or aerosol-
generating procedure• Failing to cover cough• Having cavitation on chest radiograph
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TB Patient Characteristics That Increase Risk for Infectiousness (2)
• Positive acid-fast bacilli (AFB) sputum smear result
• Disease of respiratory tract and larynx• Disease of respiratory tract and lung
or pleura• Inadequate TB treatment
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Characteristics of Infectiousness
Infectiousness related to– Cough >3 weeks– Cavitation on chest radiograph– Positive sputum smear results
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Characteristics of Infectiousness
– Respiratory tract disease involving lung, airway, or larynx
– Failure to cover mouth and nose when coughing– Inadequate treatment– Undergoing cough- or aerosol-producing
procedures
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Antituberculosis Drugs
• Isoniazid
• Rifampin
• Pyrazinamide
• Ethambutol
• Rifabutin*
• Rifapentine
• Streptomycin
• Cycloserine
• p-Aminosalicylic acid
• Ethionamide
• Amikacin or kanamycin*
• Capreomycin
• Levofloxacin*
• Moxifloxacin*
• Gatifloxacin*
First-Line Drugs Second-Line Drugs
** Not approved by the U.S. Food and Drug Administration for use in the Not approved by the U.S. Food and Drug Administration for use in the treatment of TBtreatment of TB
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Drug Abbreviations
Ethambutol EMBIsoniazid INHPyrazinamide PZARifampin RIFRifapentine RPTStreptomycin SM
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Treatment Regiments for LTBI
DrugsMonths of Duration
IntervalMinimum
Doses
INH 9*Daily 270
2x wkly 76
INH 6Daily 180
2x wkly 52
RIF 4 Daily 120
*Preferred
INH=isoniazid; RIF=rifampin
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Treatment for TB Disease
• TB treatment regimens must contain multiple drugs to which M. tuberculosis is susceptible
• Treating TB disease with a single drug can lead to resistance
• Also, adding a single drug to a failing regimen can lead to drug resistance
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Treatment for TB Disease • Preferred regimen
– Initial phase: 2 months isoniazid (INH), rifampin (RIF), pyrazinamide (PZA), and ethambutol
– Continuation phase: 4 months INH and RIF• In patients with cavitary pulmonary TB and positive
culture results at end of initiation phase, continuation phase should be 7 months
• TB patients with HIV who are taking anti-retrovirals (ARVs) should be managed by TB/HIV disease experts– TB treatment regimens might need to be altered
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Factors Guiding Treatment Initiation
• Epidemiologic information • Clinical, pathological, chest x-ray findings
• Microscopic examination of acid-fast
bacilli (AFB) in sputum smears • Nucleic acid amplification test (when
performed)
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Persons at Higher Risk for Exposure to and Infection with M. tuberculosis
• HCWs unknowingly exposed to TB patient• Low-income, medically underserved groups• Locally defined high-risk groups• Young persons exposed to high-risk adults
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When to Consider Treatment Initiation
• Positive AFB smear • Treatment should not be delayed because of
negative AFB smears if high clinical suspicion:– History of cough and weight loss– Characteristic findings on chest x-ray– Emmigration from a high-incidence country
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Other Examinations to Conduct When TB Treatment Is Initiated
• Counseling and testing for HIV infection• CD4+ T-lymphocyte count for HIV-positive
persons• Hepatitis B and C serologic tests, if risks
present
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Other Examinations to Conduct When TB Treatment Is Initiated
• Measurements of aspartate aminotransferase (AST), alanine aminotransferase (ALT), bilirubin, alkaline phosphatase, serum creatinine, and platelet count
• Visual acuity and color vision tests (when EMB used)
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Algorithm to Guide Treatment of Culture-Negative TB
Give continuation- phase treatment
of INH/RIF dailyor twice weekly for
2 months
NO YES
Wasthere
symptomaticor chest x-ray
improvement after2 months of treatment?
NO YES
Isinitial
culture positive?
Continue treatment for culture-
positive TB
• Discontinue treatment• Patient presumed to
have LTBI• Treatment completed
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Role of New Drugs
• Rifabutin: For patients receiving medications having unacceptable interactions with rifampin (e.g., persons with HIV/AIDS)
• Rifapentine: Used in once-weekly continuation phase for HIV-negative adults with drug-susceptible noncavitary TB and negative AFB smears at completion of initial phase of treatment
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Role of New Drugs
• Fluoroquinolones (Levofloxacin, Moxifloxacin, Gatifloxacin): Used when
-first-line drugs not tolerated;-strains resistant to RIF, INH, or EMB; or-evidence of other resistance patterns with fluoroquinolone susceptibility
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Common Adverse Reactions to Drug Treatment
Drug Adverse Reaction Signs and SymptomsAny drug Allergy Skin rash
Ethambutol Eye damage Blurred or changed visionChanged color vision
Isoniazid,Pyrazinamide,orRifampin
Hepatitis Abdominal painAbnormal liver function test resultsFatigueLack of appetiteNauseaVomitingYellowish skin or eyesDark urine
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Common Adverse Reactions to Drug Treatment
Drug Adverse Reaction Signs and SymptomsIsoniazid Peripheral
neuropathyTingling sensation in hands and feet
Pyrazinamide Gastrointestinalintolerance
Arthralgia
Arthritis
Upset stomach, vomiting, lack of appetite
Joint aches
Gout (rare)Streptomycin Ear damage
Kidney damage
Balance problems
Hearing loss
Ringing in the ears
Abnormal kidney function test results
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Common Adverse Reactions to Drug Treatment
Caused by Adverse Reaction Signs and SymptomsRifamycins
• Rifabutin
• Rifapentine
• Rifampin
Thrombocytopenia
Gastrointestinal intolerance
Drug interactions
Easy bruising
Slow blood clotting
Upset stomach
Interferes with certain medications, such as birth control pills, birth control implants, and methadone treatment
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Drug Interactions • Relatively few drug interactions substantially
change concentrations of antituberculosis drugs
• Antituberculosis drugs sometimes change concentrations of other drugs-Rifamycins can decrease serum concentrations of many drugs, (e.g., most of the HIV-1 protease inhibitors), to subtherapeutic levels
-Isoniazid increases concentrations of some drugs (e.g., phenytoin) to toxic levels
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Prevention of TB in persons with DM
Persons with diabetes mellitus (DM) who are at increased risk of tuberculosis (TB) should be screened for latent TB infection (LTBI)
• TST or IGRA should be done at time of DM diagnosis
Patients with DM who are found to have LTBI should be encouraged to take INH for 9 months
• Patients with DM on INH should receive vitamin B6 to prevent INH induced neuropathy
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Screening for DM in persons with TB
• Every patient with TB over the age of 18 should be screened for DM– A fasting plasma glucose > 125 mg/dl = DM– A random plasma glucose > 200 mg/dl = DM– A Hemoglobin A1c > 6.5% = DM
• Abnormal glucose values should be repeated in patients who have no symptoms of DM
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Screening for DM in persons with TB
• Glucose should be repeated after 2-4 weeks of TB Rx or if symptoms of hyperglycemia develop– Rifampin and INH can markedly elevate glucose
levels– Use the same criteria to diagnose DM as at initial
evaluation
• Ask about polyuria/polydipsia at TB clinic visits
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Management of DM in patients receiving TB treatment
• Use the frequent contact with the patient during TB treatment to help manage his/her DM in the TB clinic– There should be a glucose meter in every TB clinic and
blood glucose should be frequently checked in the clinic for those with DM
– All clinical staff should reinforce lifestyle changes at TB clinic visits
– If available, refer persons with diabetes to a diabetes specialty clinic or clinician comfortable with treating DM
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Management of DM in patients receiving TB treatment
• DOT workers should encourage lifestyle changes at every encounter– Dietary changes and physical activity are most
important in this effort– Use available structured diabetes education materials
i.e. NDEP available at: www.YourDiabetesInfo.org– Consider delivering DM meds with TB meds via DOT
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Treatment of TB in persons with DM
• Ensure that TB treatment is appropriately adjusted in persons with DM– Check creatinine for diabetic nephropathy– May need to adjust frequency of PZA and EMB
administration– Give B6 to prevent INH induced peripheral
neuropathy
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Treatment of TB in persons with DM
• Ensure that TB treatment is appropriately adjusted in persons with DM– Persons with DM have a relative immune suppression
and often a higher burden of disease– Consider extending treatment to 9 months for
persons with DM and caviatary disease OR delayed sputum clearance.
– Upon completion of therapy, obtain smear and culture for AFB
– Follow up the patient at 6 months and one year after treatment completion
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Treatment of TB in persons with DM
• Observe closely for treatment failure– Be aware of poor absorpti0on of some TB meds in
DM– Manage the many interactions between TB and DM
meds– There may be a slight increase in diabetic retinopathy
in persons with DM
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Special Treatment SituationsRenal Insufficiency and End-Stage
Renal Disease • Renal insufficiency complicates management
of TB because some antituberculosis medications are cleared by the kidneys
• Dosage should not be decreased because peak serum concentrations may be too low; smaller doses may decrease drug efficacy
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• Dosing interval of antituberculosis drugs should be decreased
• Most drugs can be given 3 times weekly after hemodialysis; for some drugs, dose must be adjusted
Special Treatment SituationsRenal Insufficiency and End-Stage
Renal Disease
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Special Treatment SituationsHepatic Disease
• Must consider regimens with fewer hepatotoxic agents for patients with liver disease
• Recommended regimens:1) Treatment without PZA
Initial phase (2 months): INH, RIF, and EMBContinuation phase (7 months): INH and RIF
2) Treatment without INHInitial phase (2 months): RIF, PZA, and EMBContinuation phase (4 months): RIF, EMB, and PZA
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Special Treatment SituationsHepatic Disease
• Recommended regimens: (continued)
3) Regimens with only one potentially hepatotoxic drug
• RIF should be retained• Duration of treatment is 12-18 months
4) Regimens with no potentially hepatotoxic drugs
– Duration of treatment is 18-24 months
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Treatment Failure• Defined as positive cultures after 4 months of
treatment in patients for whom medication ingestion was ensured
• Single new drug should never be added to a failing regimen; it may lead to acquired resistance to the added drug
• Add at least three new drugs (e.g., fluoroquinolone, ethionamide, and an injectable drug: SM, amikacin, kanamycin, or capreomycin) to the existing regimen being cognizant of the possibility of drug resistance
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References• Centers for Disease Control and Prevention. Guidelines
for preventing the transmission of Mycobacterium tuberculosis in health-care settings, 2005. MMWR 2005; 54 (No. RR-17): 1–141.
http://www.cdc.gov/nchstp/tb/pubs/mmwrhtml/ Maj_guide/infectioncontrol.htm
• Errata (August 2006) available onlinehttp://www.cdc.gov/nchstp/tb/pubs/mmwrhtml/ Errata_table.pdf
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Guidelines for Preventing the Transmission of M. tuberculosis in Health-Care Settings,
2005
Division of Tuberculosis EliminationDecember 2006
note: Slide #123 has been edited.
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Additional TB Guidelines• CDC. Prevention and Control of Tuberculosis in Correctional and Detention Facilities:
Recommendations from CDC.MMWR 2006; 55 (No. RR-09): 1–44. • CDC. Guidelines for the investigation of contacts of persons with infectious tuberculosis:
recommendations from the National Tuberculosis Controllers Association and CDC. MMWR 2005; 54 (No. RR-15): 1-37.
• CDC. Guidelines for using the QuantiFERON-TB Gold Test for detecting Mycobacterium tuberculosis infection, United States. MMWR 2005; 54 (No. RR-15): 49-55.
• CDC. Controlling tuberculosis in the United States: recommendations from the American Thoracic Society, CDC, and the Infectious Diseases Society of America. MMWR 2005; 54 (No. RR-12): 1-81.
• CDC. Guidelines for infection control in dental health-care settings—2003. MMWR 2003; 52 (No. RR-17).
• CDC. Treatment of tuberculosis. American Thoracic Society, CDC, and Infectious Diseases Society of America. MMWR 2003; 52 (No. RR-11).
• CDC. Guidelines for environmental infection control in health-care facilities: recommendations of CDC and the Healthcare Infection Control Practices Advisory Committee (HICPAC).MMWR 2003; 52 (No. RR-10).
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Additional Resources
For additional information on TB, visit the CDC Division of Tuberculosis Elimination website at
http://www.cdc.gov/tb
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