| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Giardia/Cryptosporidium EIA (LABCORP)
Test Code99901000638
Alias/See Also
LAB3027: Giardia/Cryptosporidium Test by Immunoassay | LABCORP EAP: 183558
CPT Codes
87328x1, 87329x1
Preferred Specimen
LABCORP LAB: Pink & White Para Paks (Room Temperature) Min Vol: 2 g or 2 mL
Minimum Volume
Min Vol: 2 g or 2 m
Transport Temperature
Test Includes: Cryptosporidium antigen; Giardia lamblia antigen
Specimen: Stool
Volume: 2 g (thumbnail size portion of stool) or 2 mL liquid stool
Minimum Volume: 2 g or 2 mL
Container: O&P transport vial with formalin (Para-Pak® Pink & White); stool C&S transport vial with Cary Blair medium (Para-Pak® orange); sterile screw cap container or Para-Pak® white
Collection: Fecal specimens for parasitic examination should be collected before initiation of antidiarrheal therapy or antiparasitic therapy. The highest yield on hospitalized patients occurs when diarrhea is present on admission or within 72 hours of admission. The onset of diarrhea more than 72 hours after admission is usually caused by Clostridium difficile toxin rather than parasites or the usual stool pathogens. The following recommendations are made for efficient and cost-effective diagnosis of diarrheal disease in patients admitted with gastroenteritis.
• Submit one or two specimens per diarrheal illness immediately. Consider first requesting EIAs for Giardia and Cryptosporidium (See test Giardia lamblia, Direct Detection EIA [182204] or Giardia lamblia, Direct Detection EIA and Cryptosporidium, Direct Detection EIA [183558]). Giardia and Cryptosporidium are the most common causes of parasitic gastroenteritis in the United States.
• If EIAs are negative, request add-on testing for Ova and Parasites Examination (008623), and submit an additional specimen after five days for O&P examination.
• Also consider testing for unusual stool pathogens (Cyclospora Smear Stool [183145]), especially in the immunocompromised patient.
Storage Instructions: Maintain stool specimens in O&P transport with formalin at room temperature or refrigerate and test within two months of collection. Stool collected in Cary Blair medium should be refrigerated or frozen and tested within one week of collection. Stool in sterile container should be frozen or can be kept refrigerated if tested within 48 hours.
Specimen: Stool
Volume: 2 g (thumbnail size portion of stool) or 2 mL liquid stool
Minimum Volume: 2 g or 2 mL
Container: O&P transport vial with formalin (Para-Pak® Pink & White); stool C&S transport vial with Cary Blair medium (Para-Pak® orange); sterile screw cap container or Para-Pak® white
Collection: Fecal specimens for parasitic examination should be collected before initiation of antidiarrheal therapy or antiparasitic therapy. The highest yield on hospitalized patients occurs when diarrhea is present on admission or within 72 hours of admission. The onset of diarrhea more than 72 hours after admission is usually caused by Clostridium difficile toxin rather than parasites or the usual stool pathogens. The following recommendations are made for efficient and cost-effective diagnosis of diarrheal disease in patients admitted with gastroenteritis.
• Submit one or two specimens per diarrheal illness immediately. Consider first requesting EIAs for Giardia and Cryptosporidium (See test Giardia lamblia, Direct Detection EIA [182204] or Giardia lamblia, Direct Detection EIA and Cryptosporidium, Direct Detection EIA [183558]). Giardia and Cryptosporidium are the most common causes of parasitic gastroenteritis in the United States.
• If EIAs are negative, request add-on testing for Ova and Parasites Examination (008623), and submit an additional specimen after five days for O&P examination.
• Also consider testing for unusual stool pathogens (Cyclospora Smear Stool [183145]), especially in the immunocompromised patient.
Storage Instructions: Maintain stool specimens in O&P transport with formalin at room temperature or refrigerate and test within two months of collection. Stool collected in Cary Blair medium should be refrigerated or frozen and tested within one week of collection. Stool in sterile container should be frozen or can be kept refrigerated if tested within 48 hours.
Report Available
LABCORP LAB STAT: 5760 min Routine: 5760 min Extended TAT: No TAT min Timed: 5760 min Life or Death: 5760 min
Last Updated: August 28, 2025
