BioFire® FilmArray® Gastrointestinal (GI) Panel at Chughtai Lab

BioFire® FilmArray® Gastrointestinal (GI) Panel at Chughtai Lab

The BioFire® FilmArray® Gastrointestinal (GI) Panel at Chughtai Lab represents a paradigm shift in the rapid diagnosis of infectious gastroenteritis. Gastroenteritis is a major cause of morbidity and mortality worldwide, particularly in developing regions like Pakistan, where waterborne pathogens and foodborne illnesses are highly prevalent. Traditional diagnostic methods, such as manual stool microscopy, stool culture, and antigen-based enzyme-linked immunosorbent assays (ELISA), often require several days to yield results. Furthermore, these conventional methods suffer from limited sensitivity and are unable to detect many fastidious pathogens or viral etiologies. The BioFire® FilmArray® Gastrointestinal (GI) Panel addresses these clinical challenges by utilizing advanced molecular diagnostics to detect a comprehensive menu of 22 gastrointestinal pathogens from a single stool specimen in approximately one hour.

This state-of-the-art molecular testing system utilizes multiplex nested Polymerase Chain Reaction (PCR) technology. It automates the entire testing process, including sample preparation, nucleic acid extraction, purification, amplification, and detection, within a closed system. By targeting the specific DNA or RNA sequences of bacteria, viruses, and parasites, this panel provides highly sensitive and specific results. This rapid syndromic testing approach enables consultant gastroenterologists, pediatricians, and infectious disease specialists at Chughtai Lab to make timely, evidence-based clinical decisions, initiate targeted antimicrobial therapy, avoid unnecessary empiric treatments, and implement appropriate infection control measures promptly.

The anatomical structures evaluated indirectly through this investigation include the entire gastrointestinal tract, specifically the mucosal linings of the stomach, small intestine, and large intestine. When pathogens invade these mucosal barriers, they induce inflammatory, secretory, or osmotic changes, leading to clinical symptoms such as severe diarrhea, abdominal cramping, vomiting, and systemic fever. Identifying the precise microbial etiology is essential for distinguishing between self-limiting viral infections and severe bacterial or parasitic infestations that require targeted therapeutic intervention.

Clinical Procedure: What to Expect

Patient Preparation

To ensure the highest level of diagnostic accuracy and prevent sample contamination, patients must adhere to the following preparation guidelines:

• No Fasting Required: There is no need to fast or modify your dietary intake prior to stool sample collection.
• Sterile Container: Use only the sterile, leak-proof stool collection container provided by Chughtai Lab. Do not use non-medical containers, as they may contain chemical residues that inhibit PCR amplification.
• Avoid Contamination: Ensure the stool sample does not come into contact with urine, toilet water, soap, or toilet paper. These substances can introduce external contaminants or chemical inhibitors that interfere with the molecular assay.
• Medication History: Inform your physician and the laboratory staff of any recent or ongoing antimicrobial, antiviral, or antiparasitic therapies, as well as any bismuth-containing antacids or laxatives, as these may impact pathogen load and clinical interpretation.
• Prompt Delivery: The collected specimen should be delivered to the nearest Chughtai Lab collection center immediately. If a delay of more than two hours is anticipated, the sample must be stored in a refrigerator at 2 to 8 degrees Celsius, or collected in a specific transport medium (such as Cary-Blair transport medium) as advised by the laboratory staff.

During the Procedure

The clinical procedure for the BioFire® FilmArray® Gastrointestinal (GI) Panel is entirely non-invasive and safe for patients of all ages, including infants and elderly individuals. The process involves the following steps:

• Sample Collection: The patient (or caregiver) collects a small sample of fresh stool (approximately the size of a walnut for solid stool, or 5 to 10 milliliters for liquid stool) using the clean spatula attached to the lid of the sterile container.
• Specimen Reception: Upon arrival at Chughtai Lab, the specimen is verified, barcoded, and logged into the Laboratory Information Management System (LIMS) to prevent any sample mix-ups.
• Reagent Preparation: In the molecular diagnostics laboratory, a trained laboratory technologist injects hydration solution and the stool sample mixed with sample buffer into the BioFire® GI Panel pouch.
• Instrument Loading: The pouch is inserted into the BioFire® FilmArray® instrument, where the automated run begins.
• Automated Processing: The instrument performs cell lysis to release nucleic acids, extracts and purifies the DNA and RNA, performs nested multiplex PCR to amplify target genes, and analyzes the melting curves to detect the presence of specific pathogens.
• Duration: The instrument run time is approximately one hour. However, the overall turnaround time includes sample transport, quality control checks, and pathologist verification.

When is a BioFire® FilmArray® Gastrointestinal (GI) Panel Performed?

Severe, Persistent, or Bloody Diarrhea

Physicians request this panel when a patient presents with acute, severe diarrhea, particularly when accompanied by blood (dysentery) or mucus in the stool. These symptoms often indicate invasive bacterial pathogens such as Shigella, Campylobacter, or enteroinvasive Escherichia coli (EIEC). Rapid identification is critical to initiate appropriate antibiotic therapy and prevent severe complications like hemolytic uremic syndrome (HUS), which is associated with Shiga toxin-producing E. coli (STEC).

Immunocompromised Patient Evaluation

In immunocompromised individuals—such as patients undergoing chemotherapy, organ transplant recipients on immunosuppressive medications, or individuals with HIV/AIDS—gastrointestinal infections can be atypical, severe, and rapidly life-threatening. Opportunistic pathogens like Cryptosporidium, Microsporidia, or Cytomegalovirus can cause chronic, debilitating diarrhea. The BioFire GI Panel allows clinicians to quickly identify these pathogens and tailor targeted antimicrobial or supportive therapies.

Suspected Outbreaks of Foodborne or Waterborne Illness

When multiple individuals present with similar gastrointestinal symptoms after consuming shared food or water, a localized outbreak is suspected. Public health officials and clinicians utilize this comprehensive molecular panel to rapidly identify the causative agent, whether it be Salmonella, Vibrio cholerae, or Norovirus. This rapid identification is essential for implementing immediate public health interventions, tracing the source of contamination, and preventing further spread within the community.

Persistent Diarrhea in Returned Travelers

Travelers returning from regions with varying sanitation standards often present with persistent diarrheal illness, commonly referred to as traveler’s diarrhea. This condition can be caused by a wide array of bacterial, parasitic, or viral pathogens, including Enterotoxigenic E. coli (ETEC), Giardia lamblia, or Cryptosporidium. Because empirical treatment may not cover all potential pathogens, the BioFire GI Panel provides a comprehensive diagnostic screen to guide targeted, effective therapy.

Hospital-Acquired Diarrhea and Antibiotic-Associated Colitis

Patients who develop diarrhea after being hospitalized for more than three days, or those with a history of recent antibiotic use, are at a high risk for Clostridioides difficile infection (CDI). Differentiating CDI from other causes of nosocomial diarrhea is critical. The BioFire GI Panel detects Clostridioides difficile toxin A/B genes rapidly, allowing for immediate patient isolation, discontinuation of the inciting antibiotic, and initiation of targeted therapy with vancomycin or fidaxomicin.

What Does a BioFire® FilmArray® Gastrointestinal (GI) Panel Detect?

The BioFire® FilmArray® Gastrointestinal (GI) Panel is designed to detect 22 distinct pathogens simultaneously. The specific targets detected by this panel include:

• Campylobacter species: Common bacterial pathogens causing inflammatory diarrhea, often associated with undercooked poultry.
• Clostridioides difficile (Toxin A/B): The primary cause of antibiotic-associated pseudomembranous colitis.
• Plesiomonas shigelloides: A waterborne bacterium associated with gastroenteritis from contaminated fresh water or shellfish.
• Salmonella species: Major bacterial pathogens responsible for food poisoning, gastroenteritis, and enteric fever.
• Vibrio species: Including Vibrio cholerae, the causative agent of cholera, characterized by severe, watery “rice-water” stools and rapid dehydration.
• Yersinia enterocolitica: A bacterium causing enterocolitis, often mimicking acute appendicitis.
• Enteroaggregative E. coli (EAEC): A diarrheagenic E. coli strain associated with acute and persistent diarrhea.
• Enteropathogenic E. coli (EPEC): A major cause of infantile diarrhea in developing countries.
• Enterotoxigenic E. coli (ETEC): The primary causative agent of traveler’s diarrhea, producing heat-labile and/or heat-stable enterotoxins.
• Shiga-like toxin-producing E. coli (STEC): E. coli strains producing Shiga toxins (stx1/stx2), which can lead to hemorrhagic colitis and hemolytic uremic syndrome.
• E. coli O157: A specific, highly pathogenic serotype of STEC associated with severe foodborne outbreaks.
• Shigella / Enteroinvasive E. coli (EIEC): Pathogens causing bacillary dysentery, characterized by painful, bloody stools.
• Cryptosporidium: A microscopic parasite causing watery diarrhea, particularly severe in immunocompromised individuals.
• Cyclospora cayetanensis: A coccidian parasite causing prolonged, relapsing watery diarrhea.
• Entamoeba histolytica: The protozoan parasite responsible for amebic dysentery and liver abscesses.
• Giardia lamblia: A flagellated protozoan causing malabsorptive diarrhea, bloating, and flatulence.
• Adenovirus F40/41: A common viral cause of pediatric gastroenteritis.
• Astrovirus: A virus causing mild diarrheal illness, primarily in children and the elderly.
• Norovirus GI/GII: The leading cause of epidemic non-bacterial gastroenteritis worldwide, highly contagious.
• Rotavirus A: The most common cause of severe, dehydrating diarrhea in infants and young children globally.
• Sapovirus: A calicivirus causing acute gastroenteritis across all age groups.

Turnaround Time and Report Access at Chughtai Lab

Chughtai Lab is committed to delivering highly accurate and timely diagnostic results. Because the BioFire® FilmArray® Gastrointestinal (GI) Panel utilizes automated molecular technology, the processing time within the laboratory is highly optimized. Reports are typically verified and made available within 24 to 48 hours of sample receipt at the main molecular diagnostics facility.

Patients and referring physicians can access reports seamlessly through multiple digital channels. Once the report is finalized by a consultant pathologist, an automated SMS notification containing a secure download link is sent to the patient’s registered mobile number. Reports can also be accessed online via the official Chughtai Lab website portal or through the user-friendly Chughtai Lab Mobile App, available on iOS and Android platforms. Physical copies of the report can be collected from any of the numerous Chughtai Lab collection centers located across Lahore, Karachi, Islamabad, and other major cities nationwide.

BioFire® FilmArray® Gastrointestinal (GI) Panel Findings Overview

Structure / Parameter Evaluated	Normal Findings	Possible Abnormal Findings
Campylobacter (jejuni/coli/lari)	Not Detected	Detected (indicates active Campylobacter infection)
Clostridioides difficile (Toxin A/B)	Not Detected	Detected (indicates C. difficile infection or colonization)
Salmonella species	Not Detected	Detected (indicates Salmonella gastroenteritis)
Shigella / Enteroinvasive E. coli (EIEC)	Not Detected	Detected (indicates bacillary dysentery)
Shiga-like toxin-producing E. coli (STEC)	Not Detected	Detected (requires monitoring for hemolytic uremic syndrome)
Giardia lamblia	Not Detected	Detected (indicates giardiasis, requiring antiparasitic therapy)
Cryptosporidium species	Not Detected	Detected (indicates cryptosporidiosis, critical in immunocompromised)
Norovirus GI/GII	Not Detected	Detected (indicates highly contagious viral gastroenteritis)
Rotavirus A	Not Detected	Detected (common cause of pediatric dehydrating diarrhea)

Note: Diagnostic findings should always be interpreted by a qualified healthcare professional together with the patient’s symptoms, medical history, physical examination, laboratory investigations, previous imaging studies, and other relevant clinical information. Additional investigations or specialist consultation may be recommended depending on the findings.

Why Choose Chughtai Lab for BioFire® FilmArray® Gastrointestinal (GI) Panel?

• Experienced Healthcare Professionals: Chughtai Lab employs highly qualified molecular biologists and consultant pathologists who oversee all testing procedures to ensure clinical excellence.
• Patient-Focused Care: The laboratory prioritizes patient comfort, safety, and convenience at every stage of the diagnostic journey.
• Quality Diagnostic Services: Utilizing state-of-the-art molecular diagnostic platforms ensures high sensitivity and specificity for all PCR-based assays.
• Professional Reporting: Reports are structured clearly, providing detailed information on all 22 targets to assist clinicians in rapid decision-making.
• Modern Diagnostic Approach: By implementing syndromic multiplex PCR panels, Chughtai Lab remains at the forefront of modern laboratory medicine.
• Comfortable Environment: All collection centers are designed to offer a clean, hygienic, and welcoming environment for patients.
• Convenient Location: With a vast network of hundreds of collection centers across Pakistan, patients can easily access diagnostic services close to home.
• Commitment to Accurate Diagnosis: Strict internal quality control protocols and participation in external quality assurance programs guarantee the reliability of every test result.