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Doctor insights on: Stool Culture Positive For Giardia

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Dr. Creighton Wright
3 doctors shared insights

Stool Culture Positive For Giardia (Overview)

In brief, if giardia was cultured, it is consistent with giardia infection (giardiasis)- see http://www.Emedicinehealth.Com/giardiasis/article_em.Htm however, giardia are generally detectable (as trophozoites and cysts) by simple microscopic evaluation. For early infection eia antigen-antibody based test may be needed. However, giardia culture are practiced rarely in research setting.


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Will a stool culture detect h.pylori?

Will a stool culture detect h.pylori?

Stool antigen: Three methods can be used to diagnose H pylori infection: 1. Upper GI tract biopsy, histologic exam, rapid urease testing, culture 2. Urea breath test employing 14C or 13C-urea 3. Stool antigen detection. So not a stool culture per say, but looking for the presence of H. Pylori antigen in the stool. ...Read more

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Dr. Creighton Wright
3 doctors shared insights

Stool Culture Positive For Giardia (Overview)

In brief, if giardia was cultured, it is consistent with giardia infection (giardiasis)- see http://www.Emedicinehealth.Com/giardiasis/article_em.Htm however, giardia are generally detectable (as trophozoites and cysts) by simple microscopic evaluation. For early infection eia antigen-antibody based test may be needed. However, giardia culture are practiced rarely in research setting.


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Urinalysis negative but culture positive for e.Coli (100, 000 cfu ml) w/cath draw. Blood culture negative. Fever of 104. Why was urinalysis negative?

Urinalysis negative but culture positive for e.Coli (100, 000 cfu ml) w/cath draw. Blood culture negative. Fever of 104. Why was urinalysis negative?

Urinalysis: Sounds like you may have had upper urinary tract infection without spillage of inflammatory cells into the renal calyx, so that although the bacteria showed up the inflammatory cells did not. The other alternative is that this was somehow a contaminated specimen and the e. Coli were not from the urinary tract. ...Read more

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Will mucus in stool cause a false positive for blood in a FOBT stool test?

Will mucus in stool cause a false positive for blood in a FOBT stool test?

No: But depending on the test method there are other causes of false positive. Did you do a guiac test of FIT test. FIT test has fewer false positives, but it only detects colonic bleeds. ...Read more

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Can taking antibiotics effect results for stool specimen for h pylori?

Can taking antibiotics effect results for stool specimen for h pylori?

Yes: Both antibiotics and acid reducing agents such as Prilosec should be held for at least 14 days before testing for h. Pylori. ...Read more

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Will Zantac 150mg cause a false negative H. pylori stool lab result? If so, how long is waiting period before having stool lab for H. Pylori?

Will Zantac 150mg cause a false negative H. pylori stool lab result?  If so, how long is waiting period before having stool lab for H. Pylori?

Good question: Hi, Thank you for your question. Medication that will reduce the bacteria load can lead to false negative result. PPI, bismuth, Sucralfate and antibiotics can reduce H. pylori load. Zantac DOES NOT affect test result. Don't worry! Hope that helps..contact me if you have any other questions :-) Dr. M ...Read more

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Does a positive fecal leucocyte test (when negative for all other bacteria, viral, and parasitic targets) ALWAYS indicate IBD?

Does a positive fecal leucocyte test (when negative for all other bacteria, viral, and parasitic targets) ALWAYS indicate IBD?

No.: It always indicates bowel irritation. It would be inflammatory not irritable bowel, or infection. How can they test for ALL infection ? basically needs scoping and biopsy. ...Read more

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Got a vaginal swab done for chlamydia retest. Chlamydia came back negative. But positive for proteus mirabilis. Could that possibly hidden chlamydia?

Got a vaginal swab done for chlamydia retest. Chlamydia came back negative. But positive for proteus mirabilis. Could that possibly hidden chlamydia?

Chlamydia: There are several means of testing for chlamydia and without knowing what method your doctor used cannot be definitive, but if they used culture (uncommon) proteus mirabilis could interfere. Nucleic acid amplification or hybridazation tests, elisa assays or direct fluorescent antibody testing tests are more common and would not be affected by proteus. ...Read more

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Diagnosis-Chronic Prostatitis, however semen culture+urine sample shows no pathogens. Should I worry about non-cultarable bacteria? STI screen Negativ

Diagnosis-Chronic Prostatitis, however semen culture+urine sample shows no pathogens. Should I worry about non-cultarable bacteria? STI screen Negativ

No: If common bacteria and STDs have been ruled out then your chronic prostatitis is a matter of irritation that is common in young sexually active men and things should settle down later on. No need to worry too much at this time. ...Read more

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Can you have a UTI when urinalysis negative, but urine culture positive for group b strep?

Can you have a UTI when urinalysis negative, but urine culture positive for group b strep?

Perhaps......: The finding of bacteria in the urine without accompanying symptoms is referred to as asymptomatic bacteriuria. Whether or not to treat this should be discussed with your physician, especially if you are pregnant. ...Read more

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Urine; moderate WBC, no nitrites, culture <50k multiple non-uropathogenic gram positive bacteria. No symptoms. Possible contamination? Antibiotics??

Urine; moderate WBC, no nitrites, culture <50k multiple non-uropathogenic gram positive bacteria. No symptoms. Possible contamination? Antibiotics??

Contaminant: Infection is when pathogens (bacteria for example) invade your tissues. This almost always produces signs which include redness, swelling, warmth and pain. In the absence of symptoms this is a contaminant or a colonization of your urinary tract. Note: Do not test urine without a good reason.... ...Read more

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blood test IGG 17.95 positive and IGM 8.50 negative. stool test was negative. do I infect with h.pylori?

 blood test IGG 17.95 positive and IGM 8.50 negative. stool test was negative. do I infect with h.pylori?

Past infection: These results suggest past infection with H. pylori. The blood test can remain positive for years after past infection even if you were treated. The stool test and urea breath test can better detect current infection. The gold standard for testing is a biopsy during endoscopy. https://www.nlm.nih.gov/medlineplus/ency/article/007501.htm ...Read more

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When would one need a giardia lamblia antigen assay?

When would one need a giardia lamblia antigen assay?

Diarrhea: Non-bloody diarrhea with fevers and weight loss, especially after exposure to potentially contaminated fresh water sources (rivers, lakes) may prompt a stool test to rule out giardia. ...Read more

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Is > 100, 000 col/ml staph coagulase negative beta lactamase positive in urine culture an infection or skin contamination?

Is > 100, 000 col/ml staph coagulase negative beta lactamase positive in urine culture an infection or skin contamination?

Skin contmaination: Coag negative staph on urine culture is not of pathological significance. Please consult the site below for preparation for specimen collection to avoid contamination. http://www.webmd.com/a-to-z-guides/urine-culture. ...Read more

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Urine culture positive for chlamydia and mycoplasma. What does this indicate?

Urethritis: You need to be treated with antibiotics. You should see your pcp for a prescription. You should also be tested for other sti such as gonorrhea, syphillis and hiv. ...Read more

Dr. Al Hegab
72 doctors shared insights

Giardia (Definition)

A parasitic disease caused by Giardia lamblia. About 10% of those infected have no symptoms. When symptoms occur they may include diarrhea, abdominal ...Read more


Dr. Michael Gabor
129 doctors shared insights

Stool Culture (Definition)

Involves inoculating specific culture plates with stool to isolate bacteria that cause intestinal infections such as ...Read more