Blood Culture for Fungus or Yeast

Blood Culture for Fungus or Yeast

Test Name:  

Blood Culture for Fungus or Yeast

Alternate Name (s):  

 

Laboratory Module:  

Microbiology

Ordering Mnemonic:  

BLOOD

In the comment section indicate that the specimen is to be examined for yeast.

Specimen Type:   

BLOOD CULTURE SETS
Two sets of blood cultures (3 bottles Adult/ 2 bottles pediatric) from separate venipuncture sites, drawn within a 24 hour period and prior to antibiotic therapy, are recommended. If endocarditis is suspected, collect a third set. Venipunctures at least 30 minutes apart is the preferred method.

Adult sets -consists of 1 aerobic bottle with a green flip cap and 1 anaerobic bottle with a orange cap. Two sets should be collected

(3 bottles in total).

In addition collect x2 heparinized green tubes. Store at room temperature.

Pediatric collection -consists of a single bottle that has a yellow cap. Two bottles should be collected.

In addition collect x2 heparinized green tubes. Store at room temperature.

For Bone Marrow specimens collect a single pediatric bottle.

Check the expiry date, on the container prior to use. There is a growth sensor in the bottom of the bottle. The sensor should be olive green, this also should visually be inspected prior to use.

Gradations on the side of the bottle may help to measure volume of blood being introduced.
 

IMPORTANT
Bottles for adults should be inoculated with 8 to 10 mL per bottle. *Caution* - there is a strong draw on these bottles. DO NOT EXCEED the maximum 10 mL per bottle.

Pediatric bottles should be inoculated with 2 to 4 mL.

In any venipuncture the blood cultures are always collected first.

Collection Container:  

        Blood Culture Bottles        

(also known as BacT/Alert bottles)

Blood_Culture.jpg 

Collection Information:  

Blood can be collected by venipuncture or intavascular catheters

Site selection - Select a different site for each culture drawn.  Avoid drawing blood through indwelling catheters unless blood cannot be obtained by venipuncture or if diagnosis of catheter sepsis is suspected.

Wash hands and don gloves.

Apply tourniquet.

Site Preparation - select vein appropriate for venipuncture. After selection has been made, remove tourniquet and cleanse the venipuncture site with the 0.5% chlorhexidine-70% isopropyl combination swab in a circular motion from the center of the puncture site outward covering a circular area of 1 1/2 to 2 inches in diameter for a minimum of 30 seconds. Allow to air dry and do not touch after cleansing.

Culture Bottle Preparation - Flip cap off. Clean rubber septum with 70% alcohol. Allow to dry.

Indicate on the blood culture label 10ml mark from the level of the media in each bottle prior to attempting collection. Blood will then be collected to this line.

Clean tops of any other tubes to be collected.

Vacutainer Collection - This method is preferable for adults.
Perform venipuncture and collect vacutainer specimens for other tests first using adapter cuff. Use of insert is optional. Collect blood culture bottles. Inoculate aerobic bottle first so as not to introduce air into the anaeorbic bottle which is inoculated second.

Butterfly Needle Set - Preparation of site and bottles is the same as for vacutainer collection. Collect blood culture bottles.

Needle/Syringe System - This method is preferred for children. Preparation of site and bottles is the same as for vacutainer collection. Collect blood in syringe, change needles and inject up to the pre-marked lines on the bottles. Inoculate aerobic bottle first so as not to introduce air.

Gently mix bottles to avoid clotting.

Labeling - Both blood culture bottles in the set must have the same collection number. Affix one large collection label to each of the bottles in the space provided. Do not cover the bottle bar code. Send all remaining labels in the specimen bag with the blood culture set.

Initial the barcode labels and affix to bottles. Indicate the time of collection on the lead label.

Apply band aid to venipuncture site.

Dispose of any collection system needles in accordance with standard precautions. Adapter cuffs and inserts are not disposable. Clean and sterilize these by disinfecting in bleach.

Remove gloves and wash/disinfect hands between each patient.

Transport to laboratory promptly.  

Second set to be collected 30 minutes later

Test Schedule:  

Daily

Turnaround Time:  

Routine

Preliminary: 48 hours

Final: 21 days

Stat / Urgent

Preliminary: 48 hours

Final: 21 days

Reference Interval:  

 

Critical Values:  

Positives are reported to the designated health care provider upon detection.

Cultures are incubated for 21 days.

Lab Process Notes :  

The blood culture instrument used for detection of bacterial growth monitors the samples once every 10 minutes. Gram stain will be performed when growth is indicated.

Recovery of organisms depends mainly on volume of blood collected and frequency of collection. Timing is less important, particularly if cultures are collected before antimicrobial therapy.

A single set should be discouraged as it is difficult to interpret results.
 

Modify the incubation time on BACTALERT to 21 days

Storage & Transport:  

The specimens should be transported as soon as possible to the lab.

Test Referred to :   

On site, BGH laboratory

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