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TB
Describes basics of TB
82
Health Care
Graduate
10/02/2011

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Cards

Term
How long can TB live in a dark, humid environment?
Definition
90 days
Term
What causes TB
Definition
Myobacterium Tuberculi
Term
How long does TB live in soap or alcohol solutions?
Definition
1-12 hours
Term
How long does TB live in the direct sunlight?
Definition
1-5 minutes
Term
What is TBs transmission?
Definition
Droplet nuclei
Term
What generates 3,000 droplet nuclei?
Definition
coughing, talking for 5 minutes, singing for one minute.
Term
What is TB's portal of exit and entry?
Definition
Respiratory tract (TB case coughs, sneezes, speaks, or sings for exit, direct or indirect for entry)
Term
Define latent infection?
Definition
Agent is in a non replicating, non-infectious state, but is still viable.
Term
What percentage of the world has latent tb?
Definition
1/3
Term
What is the risk of progressing from latent to active TB?
Definition
5% in the first two years after date of infection, 5% in the years following.
Term
What percentage of people develop pulmonary TB?
Definition
85%
Term
Symptoms of active TB (6)?
Definition
Unexplained weight loss
Loss of appetite
Night sweats
Fever
Fatigue
Chills
Term
Symptoms of pulmonary TB?
Definition

Coughing for 3 weeks or longer
Hemoptysis (coughing up blood)
Chest pain
Term
What are the parts of the epedimiologic triad?
Definition
Host, agent, environment.
Term
Agent factors?
Definition
Exposure, virulence of TB strain.
Term
Environmental factors (3)?
Definition
Air quality, housing, occupational setting
Term
Host factor?
Definition
Infection with HIV
Chest x-ray findings suggestive of previous TB
Substance abuse
Recent TB infection
Prolonged therapy with corticosteroids and other immunosuppressive therapy, such as prednisone and tumor necrosis factor-alpha [TNF-α] antagonists
Organ transplant
Silicosis
Diabetes mellitus
Severe kidney disease
Certain types of cancer
Certain intestinal conditions
Low body weight
Term
When did TB emerge?
Definition
40,000 years ago
Term
What is the origin of TB?
Definition
Possibly came from buffalo. Was spread when advent of agriculture created new niches for increased transmission.
Term
When were TB hospital established.
Definition
1500 BC
Term
What percentage of deaths did TB account for in the industrial revolution? Why (4)?
Definition
25, d/t urbanization, lack of medical care, crowding, malnutrition
Term
When was TB identified?
Definition
1880
Term
When did TB drugs come out? BCG vaccine?
Definition
Late 1940s, 1950
Term
How many new cases of tb are there a year?
Definition
9 million
Term
How many people die of TB a year
Definition
2 million/ 1 person every 17 seconds
Term
What percentage of TB cases occur in the developing world?
Definition
98
Term
US incedent rate of TB
Definition
5/1000
Term
Percentage of TB cases have MDR TB
Definition
5%?
Term
What 5 countries have the greatest burden of TB?
Definition
India, china, russian federation, bangladesh, south africa
Term
What number of countries have experienced cases of XDR TB
Definition
54
Term
What region has the highest number of TB cases?
Definition
Asia
Term
What burden of world TB cases do Asia and Africa shoulder
Definition
55 and 31
Term
Study slide 44
Definition
Term
What percentage of HIV infected TB cases are in Africa?
Definition
85
Term
What is the affect of HIV on TB incidence
Definition
It increases it greatly, as in the case of Africa. TB has remained stable in other areas.
Term
How many women of reproductive age die of TB each year?
Definition
750,000
Term
Are women more or less likely to progress from latent to active tb?
Definition
more likely
Term
What percentage of tb cases occur between ages 15-54?
Definition
75
Term
How many months of lost work does TB cause on average?
Definition
3-4
Term
How many years of economic productivity is lost in a family with a member that dies of TB?
Definition
15
Term
When did TB cases in the US spike again? Why?
Definition
1986-1992What co
Term
What contributed to the resurgence of TB (5)
Definition
Lack of funding, HIV, immigration, increase in MDR TB, increase in shelters and prisons.
Term
What percent decrease in Tb occurred between 1993 and 2008?
Definition
50
Term
What is the national average rate of TB
Definition
4.2
Term
What are the two high risk TB groups?
Definition
High risk for becoming infected, for developing TB disease post infection
Term
Who is at high risk for TB infection (8).
Definition
Close contacts
Foreign-born persons
Low-income groups and homeless persons
Correctional Facilities
Healthworkers
Children and adolescents
Racial and ethnic minorities
Individuals who live and/or work in special settings
Health care workers who serve high-risk groups
Racial and ethnic minorities
Infants, children, and adolescents
People who inject drugs
Term
What percentage of close contacts of TB cases become infected?
Definition
20-30
Term
High risk groups for TB infection?
Definition
Close contacts, foreign born immigrants, low-income and homeless people.
Term
What percentage of US TB patients are homeless?
Definition
6 percent
Term
What are factors that increase risk of TB in correctional facilities
Definition
Inmates who already have tb have a higher chance of developing infection, overcrowding, increased rates of HIV
Term
Risk of healthcare professionals infection depends on...
Definition
Number of persons with TB in facility.
Job duties.
Infection control procedures.
Term
Risk in adolescents and children depends on...
Definition
high risk if exposed to adults in high risk groups
Term
If a child had TB, what does it suggest?
Definition
TB was transmitted recently.
Person who transmitted TB to child may still be infectious.
Others may have been exposed.
Term
What percentage of TB cases occur in racial and ethnic minorities?
Definition
83 percent
Term
What groups are at increased risk of progressing to active TB? (5)
Definition
People living with HIV
People with medical conditions known to increase the risk for TB
People infected with M. tuberculosis within past 2 years
Infants and children younger than 4 years old
People who inject drugs
Term
What is the strongest risk factor for Tb?
Definition
HIV
Term
What is the leading cause of death for people with HIV/AIDS?
Definition
TB
Term
What is the risk of developing TB each year for people with HIV?
Definition
7-10
Term
Medical conditions that lead to increased risk of TB (5)?
Definition

Prolonged therapy with corticosterods, and other immunosuppressive therapy.
Silicosis.
Diabetes.
Severe kidney disease.
Certain types of cancer.
Term
Why do infants and children under 4 have an increased risk of Tb?
Definition
underdeveloped immune system
Term
Why do injectable drug users have an increased risk?
Definition
greater chance of HIV, injecting drugs may weaken immune system
Term
Diagnoses for latent TB?
Definition
Tuberculin Skin Test (PPD), and Quantiferon blood test
Term
Diagnosis of Active TB?
Definition
Chest X ray
Clinical exam
Sputum smear microscopy
Sputum culture
Molecular detection
Term
What are the molecular tests for Tb
Definition
GeneXpert, nucleic acid amplification
Term
Sputum smear microscopy issues?
Definition
insensitive
Term
sputum culture
Definition
slow/difficult to implement in resource poor settings.
Term
Central challenges to treating TB?
Definition
prolonged therapy, 4 drugs, resistance
Term
What is the treatment regimen
Definition
Isoniazid, Rifampin, Ethambutol, Pyrazinamide x 2 months

Isoniazid, Rifampin x 4 months
Term
What type of diagnosis does DOTS employ
Definition
Sputum smear microscopy
Term
What is the objective incidence rate in the US
Definition
1 case in 1 million, elimination
Term
What are the two foci of the TB control program in the US?
Definition

Preventing re-activation of latent TB

Preventing TB among foreign born-persons
Term
Challenges to global TB control
Definition

Persistent inequalities in health, disparities in wealth.

Inadequate political commitment.

Incomplete DOTS coverage

MDR-TB and XDR-TB.

Impact of the TB/HIV syndemic.

Slow development of new diagnostic tools and new drugs for TB.
Term
Average cost per MDR TB case in US
Definition
between 2 and 3k
Term
What is treatment for MDR tb
Definition
often times with toxic IVs, 18-24 months
Term
Issues with treating MDR tb
Definition

Long periods of isolation may be necessary

Depression is common

Disease may be incurable (chronic)

Higher rate of death
Term
What causes resistence to TB?
Definition
treating with a single drug
Term
What broader factors lead to TB resistance
?
Definition
Non compliance, health care errors, health system errors (no clinics, no drugs, poor drug quality, no lab capacity)
Term
Definition of mono-resistant tB
Definition
resistance to a single drug
Term
MDR TB is resistant to what drugs?
Definition
at least rifampin and isoniazid
Term
What drugs are XDR TB resistant to
?
Definition
rifampin, isoniazid, floroquinolones, and at least one of the three injectible drugs (amikacin, kanamycin, capreomycin)
Term
Estimated number of cases and deaths of MDR TB
Definition
511,000 150k
Term
Estimated number of cases/death of XDR TB
Definition
50k 30k
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