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University of Iowa Diagnostic Laboratories (UIDL) Test Directory 319-384-7212 (local) 1-866-844-2522 (toll free) |
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| Viral Culture | |
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Order Form: A-1a Clinical Microbiology Laboratory Requisition |
Collection Medium: |
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Rejection Criteria: |
Sputum specimen or dry swab. | ||||||||
Testing Schedule: |
0700-1630, 7 days a week, including holidays. | ||||||||
Comments: |
Viruses that may be isolated at UIHC include respiratory viruses (influenza A including H1N1; influenza B; RSV; parainfluenza 1, 2, 3; adenovirus), Herpes Simplex virus (HSV)/varicella-zoster virus (VZV), and cytomegalovirus (CMV). Specimens submitted for culture of other viruses (including enteroviruses and nonrespiratory specimens submitted for adenovirus culture) will be sent to the University Hygienic Laboratory (UHL). PCR assays for the detection of HSV (CSF), enterovirus (CSF), and CMV (blood or CSF) are available in the Molecular Pathology laboratory (see individual test listings). Requests for CMV PCR on amniotic fluid will be sent to a reference laboratory (see "CMV Quant PCR, Amniotic Fluid"). Requests for detection of enteric adenovirus antigens 40-41 in stool specimens will be sent to a reference laboratory for an ELISA test (see "Adenovirus Antigen, Fecal". | ||||||||
Sample Processing: |
Immediately place specimen into vial of transport media and seal tightly. Indicate specimen/fluid type on requisition. Label transport tube with two patient identifiers, date and time of collection. Maintain sterility and forward promptly to lab. Specimen should be collected and packaged as close to shipping time as possible. Specimen source is required on requisition for processing. Submit in sterile transport container. Submit in leakproof container. | ||||||||
Sample Storage: |
Refrigerate up to 24 hours. Specimen cannot be frozen. | ||||||||
Transport Instructions: |
Place requisition into outside pocket of bag. Place coolant packs into styrofoam container. Recommend express mail or equivalent if not on courier service. | ||||||||
Instructions: |
Collect nasopharyngeal swab in viral transport medium (33595).
Alternatively, collect tracheal aspirate, bronchoalveolar lavage,
bronchial wash, or nasopharyngeal wash/aspirate in sterile, leak-proof
container.
See specific viral agents for more details.
A. Biopsy or tissue - Keep moist with sterile saline or viral transport
media [do not use viral transport media (VTM) if bacterial, AFB, or
fungal cultures are also requested; VTM is available in kits from
Hospital Stores (923740, 33595, 33625)].
B. Blood or buffy coat culture - collect 10 mL of blood in a
lavender (EDTA) tube.
C. Bone Marrow - collect in a lavender (EDTA) tube.
D. CSF - collect 1-5 mL in a sterile container.
E. Nasopharyngeal swab: Collect specimen using the flexible minitip
flocked swab (Hospital Stores #33595).
1. Measure the distance from the patient's nostril to the
nasopharynx (half the distance from nostril to base of the ear)
and hold the swab at that location. Do not advance the swab
beyond that point.
2. Gently insert the swab along the base of one nostril (straight
back, not upwards) and continue along the floor of the nasal
passage until reaching the nasopharynx.
3. Rotate swab 2-3 times and hold in place for 5 seconds. Place swab
in tube containing viral transport medium. Break off the excess
length of swab at the score mark to permit capping of the tube.
F. Nasopharyngeal wash/aspirate:
1. Assemble equipment:
Sterile specimen trap
Personal Protective Equipment (gloves, surgical mask, eye
protection)
Appropriate size suction catheter (8 fr for infants/children,
10/12 fr for adults)
Normal saline vial
Wall suction
Bag or cup of ice for specimen transport to laboratory
2. Place patient with the head tilted slightly back.
3. With sterile gloved hand, insert suction catheter into the
patient's nose to the depth of the nasopharyngeal area (beyond
the turbinates). Do not remove catheter until end of procedure.
(see diagram)
4. With the non-sterile gloved hand, instill approximately 1-2 mL
normal saline outside the catheter.
5. Apply suction to aspirate nasopharyngeal secretions.
6. Above steps may need to be repeated to obtain 1 mL sample in
specimen trap.
7. Remove catheter from patient. With specimen trap still in-line,
rinse catheter with remaining saline to clear secretions.
8. Specimens transported by tube system must be transferred from
trap to a leak-proof sterile container (be sure the lid is
tightly secured).
G. Respiratory secretions - Collect specimens in sterile, leak-proof
container. Sputum is unacceptable for viral cultures.
H. Sterile Body fluids: Use sterile, leak-proof containers.
I. Swab - Only use swabs available in transport kits. For respiratory
virus testing use nasopharyngeal swab in flexible minitip flocked swab
kit (33595, green sticker). For skin lesions use regular flocked swab
in HSV/VZV kit (33625, beige sticker). For Chlamydia PCR testing use
Chlamydia transport kit (923740) - large swab for female cervical
specimens and small swab with metal shaft to collect male urethral
specimens.
J. Vesicle - Expose the base of the lesion by lifting the cap of the
vesicle or ulcer. Using swab from Regular flocked swab collection kit
(33625), swab the entire base of the lesion firmly to collect cellular
material (without causing bleeding). Place swab in viral transport
media and transport immediately on ice.
K. Urine - collect 1-10 mL of clean voided midstream morning urine
in a sterile, leak-proof container. |
Updated: 11/09/2009