The sensitivity and specificity of the gram-positive diplococci identification in the sputum culture of Streptococcus pneumoniae were 60% and 97.6%, and the positive and negative predictive values were 91% and 85.3%, respectively. Conclusions Good-quality sputum with PM could be obtained in only 14.4% of all patients.

What does a sputum culture reveal?

A sputum culture test can reveal whether there is an infection in the lungs and, if so, the type of bacteria or fungus involved. It is often used in the diagnosis and follow-up care of people with respiratory diseases like pneumonia and tuberculosis.

What can sputum samples show?

A sputum culture is most often used to: Find and diagnose bacteria or fungi that may be causing an infection in the lungs or airways. See if a chronic illness of the lungs has worsened. See if treatment for an infection is working.

What are some conditions that can be diagnosed through a sputum culture?

• Bronchitis.
• Lung abscess.
• Pneumonia.
• Tuberculosis.
• Chronic obstructive pulmonary disease.
• Cystic fibrosis.

How accurate is sputum test for TB?

For example, for sputum-negative, culture-positive specimens, sensitivity for a single sample is reported as 72.5%, whereas for three samples it is only 90.2% (estimated 95% confidence interval, 84.9–93.8%).

What is the color of phlegm with tuberculosis?

Tuberculosis (TB) If someone has TB, they may cough up green or bloody phlegm. They will also experience symptoms that can include: weight loss. night sweats.

How long does it take for a sputum culture to come back?

When will I get the results from my sputum tests? Smear test results are usually ready within 1 to 2 business days after it arrives at the lab. Culture results may take up to 8 weeks, depending on how quickly the bacteria grow.

What does GREY sputum indicate?

For most people, white or light gray phlegm, especially when accompanied by nasal congestion, typically signals the onset of viral bronchitis. The color indicates the presence of infection-fighting white blood cells, and phlegm and nasal mucus will be thicker than usual.

How long does it take for bacterial pneumonia to develop?

The symptoms of pneumonia can develop suddenly over 24 to 48 hours, or they may come on more slowly over several days. Common symptoms of pneumonia include: a cough – which may be dry, or produce thick yellow, green, brown or blood-stained mucus (phlegm)

How much sputum is needed for a specimen?

The necessary amount of sputum for most tests is 5 ml (about 1 teaspoon). However, multiple tests are often ordered so more specimen may be needed. Some testing is best done on serial specimens, so you may be asked to collect for three days in a row.

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Will latent TB show up on xray?

People with LTBI are healthy and do not feel sick. They typically have a negative (normal) chest x-ray. They have a positive TST and/or a positive TB blood test.

Does AFB positive mean TB?

If your AFB culture was positive, it means you have active TB or another type of AFB infection. The culture can identify which type of infection you have. Once you have been diagnosed, your provider may order a “susceptibility test” on your sample.

What if the sputum test is negative?

When a patient is “culture negative,” there are no detectable TB organisms in his/her sputum and the patient is considered completely non-contagious. The likelihood of transmission derives primarily from factors related to the TB patient or the environments in which contacts are exposed.

What are the 4 stages of pneumonia?

• Stage 1: Congestion. During the congestion phase, the lungs become very heavy and congested due to infectious fluid that has accumulated in the air sacs. …
• Stage 2: Red hepatization. …
• Stage 3: Gray hepatization. …
• Stage 4: Resolution.

What does no organisms seen mean?

A negative Gram stain is often reported as “no organism seen.” This may mean that there is no bacterial infection present or that there were not enough bacteria present in the sample to be seen with the stain under a microscope.

Does coughing up phlegm mean your getting better?

Mucus: The Warrior Coughing and blowing your nose are the best ways to help mucus fight the good fight. “Coughing is good,” Dr. Boucher says. “When you cough up mucus when you are sick, you are essentially clearing the bad guys—viruses or bacteria—from your body.”

Is TB cough dry or wet?

Cough lasting more than three weeks is often a first symptom of active tuberculosis (TB). It can start as a dry irritating cough. It tends to continue for months and get worse. In time the cough produces a lot of phlegm (sputum), which may be bloodstained.

What color is phlegm with COPD?

The color of the mucus in people with COPD can be an important sign. Most of the time mucus is clear or gray colored, although some people with chronic bronchitis will have a chronic cough with pale yellow mucus.

Can you have pneumonia without a fever?

It’s not the norm but, yes, it’s possible to have pneumonia with a low fever or even no fever. If this occurs, it’s usually in the very young (newborns and infants) and in older adults or adults with a weakened immune system.

Can bacterial pneumonia go away by itself?

Bacterial pneumonia is treated with antibiotic therapy, while viral pneumonia will usually get better on its own. In some cases, viral pneumonia can lead to a secondary bacterial pneumonia. At that point, your doctor may prescribe antibiotic therapy.

What's worse bacterial or viral pneumonia?

Both Bacteria and Viruses Can Cause Pneumonia, But One Is Much Worse for the Heart. CHICAGO — Pneumonia caused by bacterial infections poses a much greater threat to the heart than pneumonia caused by viral infections, a new study suggests.

Why is my phlegm rubbery?

Sometimes, your body needs to produce more mucus than normal to lubricate and cleanse your sinus system. That can mean that the mucus your body produces becomes stickier and rubbery. This happens because the membranes in your nose run out of moisture to make your mucus watery and clear.

What color is pneumonia sputum?

A dry cough that brings up thick phlegm is one of the main symptoms of pneumonia. The mucus might be yellow, green, red, brown, or rust-colored. Sometimes the color can be a tip-off of the type of bacteria that caused the illness.

Can GERD cause brown phlegm?

Your symptoms are suggestive of hyperacidity causing GERD which has led to the brown sputum most likely. You may require antacids to control your situation.

What is the best time to collect a sputum sample?

Best time of day to collect sputum is when you first wake. Do not eat, drink or smoke before coughing up sputum from the lungs. Rinse (do not swallow) the mouth with water before sputum is collected to minimize residual food particles, mouthwash, or oral drugs that might contaminate the specimen.

How long does sputum sample last?

It is concluded that sputum should not be stored at room temperature for longer than 3 days for culture but it can be stored for 4 weeks without any loss of smear-positivity.

What are the symptoms of latent TB?

• a bad cough that lasts 3 weeks or longer.
• pain in the chest.
• coughing up blood or sputum.
• weakness or fatigue.
• weight loss.
• no appetite.
• chills.
• fever.

Can active TB be asymptomatic?

tuberculosis do not develop the active disease and remain asymptomatic, around 5% to 10% of those infected develop the disease.

What happens if latent TB is not treated?

Without treatment, on average 1 in 10 people with latent TB infection will get sick with TB disease in the future. The risk is higher for people with HIV, diabetes, or other conditions that affect the immune system.

Can AFB smear be negative and culture positive?

AFB cultures are quite accurate. Rarely an AFB smear will be positive when the culture is negative. In these cases, the smear results are usually wrong because the sputum was contaminated. An AFB smear could also be falsely positive if you are taking antibiotics for a mycobacterial infection.

How do you collect sputum for AFB?

Take a very deep breath and hold the air for 5 seconds. Slowly breathe out. Take another deep breath and cough hard until some sputum comes up into your mouth. Spit the sputum into the plastic cup.