Pus Cells in Stool​: Causes, Symptoms and Treatment Options

If your stool test report shows the presence of pus cells, it is natural to feel concerned. Pus cells in stool are an important indicator that something is not quite right in your digestive tract. They signal that your body is actively fighting an infection or dealing with inflammation in the intestines.

A stool routine examination is one of the most common diagnostic tests when a patient reports persistent digestive complaints. It points towards an underlying condition that needs medical attention.

This blog covers what pus cells in stool mean, what causes them, the symptoms you should watch out for, how the condition is diagnosed, and what treatment options are available to help you recover.

What are Pus Cells in Stool?

Pus cells, medically referred to as leukocytes, are white blood cells that your immune system sends to areas of infection or inflammation. Their presence in stool indicates that the lining of your intestines or digestive tract is inflamed, infected, or damaged.

Under normal circumstances, white blood cells are found in the blood and lymphatic system. When they appear in the stool, it means the body is responding to a threat within the gastrointestinal tract. A stool routine test can detect these cells under a microscope, and findings are usually reported as the number of pus cells per high-power field (HPF).

A count of 0 to 4 pus cells per HPF is generally considered within the normal range. Anything above this is flagged as abnormal and requires further evaluation by a doctor.

What Causes Pus Cells in Stool?

There are several conditions that can lead to the presence of pus cells in stool. Understanding the cause is essential for effective treatment.

Bacterial Infections

Bacterial infections are one of the most common causes. Bacteria such as Salmonella, Shigella, Campylobacter, and Escherichia coli (E.coli) can infect the gastrointestinal tract and trigger an inflammatory response. These infections are often contracted through contaminated food or water and are particularly common in areas with poor sanitation.

Parasitic Infections

Parasites such as Entamoeba histolytica, the organism responsible for amoebic dysentery, can invade the intestinal lining and cause significant inflammation. This leads to the release of pus cells into the stool. Parasitic infections are commonly spread through contaminated water, raw food, or poor hygiene practices.

Inflammatory Bowel Disease (IBD)

Inflammatory bowel disease, which includes conditions like Crohn's disease and ulcerative colitis, causes chronic inflammation of the digestive tract. In these conditions, the immune system mistakenly attacks the lining of the intestines, leading to persistent inflammation and the presence of pus cells in stool over an extended period.

Intestinal Tuberculosis

Intestinal tuberculosis is caused by the Mycobacterium bacteria and can affect any part of the gastrointestinal tract. It leads to ulceration and inflammation of the intestinal lining, which results in pus cells appearing in the stool. This condition is more prevalent in countries where pulmonary tuberculosis is common.

Colorectal Infections or Abscess

An abscess or localised infection in the colon or rectum can also cause pus cells to appear in the stool. These infections may develop as a complication of other conditions, including diverticulitis or a perianal abscess, where a pocket of pus forms near the rectum and drains into the bowel.

Symptoms of Pus Cells in Stool

The presence of pus cells in stool is usually accompanied by noticeable symptoms that affect your digestive health and overall well-being. Recognising these symptoms early can help you seek timely medical care.

Diarrhoea

Frequent loose or watery stools are one of the most common. The bowel movements may be urgent and difficult to control, often occurring multiple times throughout the day, significantly disrupting your daily routine.

Abdominal Pain and Cramping

You may experience pain or cramping in your abdomen before or during a bowel movement. The pain can range from mild discomfort to severe, depending on the extent of the infection or inflammation affecting your intestinal lining.

Blood or Mucus in Stool

In many cases, pus cells in stool are accompanied by blood or mucus. Blood in the stool may appear as bright red streaks or give the stool a dark, tarry appearance. Mucus in stool indicates irritation or inflammation of the intestinal walls and is often seen alongside pus cells.

Fever

A fever is a common sign that your body is fighting an active infection. When pus cells in stool are caused by a bacterial or parasitic infection, you may develop a mild to high-grade fever accompanied by chills, fatigue, and a general feeling of being unwell.

Nausea and Vomiting

Some patients also experience nausea and vomiting alongside digestive symptoms. This is particularly common in bacterial gastroenteritis, where the infection affects both the stomach and the intestines, causing widespread discomfort throughout the gastrointestinal tract.

How are Pus Cells in Stool Diagnosed?

Diagnosing the underlying cause of pus cells in stool involves a combination of clinical assessment and laboratory investigations.

Stool Routine and Microscopy

The primary test used to detect pus cells in stool is a stool routine examination. A fresh stool sample is examined under a microscope to identify the presence and count of pus cells, red blood cells, parasites, or cysts. This test gives the doctor an initial indication of infection or inflammation.

Stool Culture

If a bacterial infection is suspected, a stool culture is ordered. The sample is placed in a growth medium in the laboratory to identify the specific bacteria responsible for the infection. This helps the doctor choose the most appropriate antibiotic for treatment.

Blood Tests

Blood tests, such as a complete blood count (CBC), can indicate whether there is an active infection or inflammatory response in the body. Elevated white blood cell counts in the blood alongside pus cells in stool further support the diagnosis of an ongoing infection.

Colonoscopy or Sigmoidoscopy

In cases where inflammatory bowel disease or a more serious condition is suspected, your doctor may recommend a colonoscopy or sigmoidoscopy. These procedures allow direct visualisation of the intestinal lining to identify ulcers, inflammation, or other abnormalities that may be causing the symptoms.

Treatment Options for Pus Cells in Stool

Treatment depends entirely on the underlying cause identified through diagnostic tests. Self-medication is not recommended, as using the wrong treatment can worsen the condition.

Antibiotics for Bacterial Infections

If a bacterial infection is confirmed through stool culture, your doctor will prescribe a course of antibiotics targeted at the specific bacteria identified. Common antibiotics used include ciprofloxacin, metronidazole, or azithromycin, depending on the type of organism and its sensitivity to medication.

Antiparasitic Medications

For parasitic infections such as amoebic dysentery, antiparasitic medications like metronidazole or tinidazole are prescribed. These drugs work by eliminating the parasite from your digestive tract and reducing the associated inflammation. The full course of medication must be completed as directed by your doctor.

Management of Inflammatory Bowel Disease

If the cause is IBD, treatment focuses on reducing inflammation and managing symptoms over the long term. Doctors may prescribe anti-inflammatory drugs, immunosuppressants, or biologics depending on the severity of the condition. Regular monitoring and dietary adjustments also play an important role in managing IBD effectively.

Oral Rehydration and Supportive Care

Regardless of the cause, maintaining adequate hydration is essential, especially when diarrhoea and vomiting are present. Oral rehydration salts (ORS) help replace lost fluids and electrolytes. In severe cases, intravenous fluids may be required if the patient is unable to retain fluids orally.

Dietary Modifications

During treatment, your doctor may advise a bland, easily digestible diet to reduce stress on your intestines. Foods that are high in fibre, spicy, or difficult to digest should be avoided temporarily. As your condition improves, you can gradually reintroduce foods into your diet under medical guidance.

Final Thoughts

Pus cells in stool should never be ignored. While the finding itself may seem alarming, it is a useful diagnostic signal that helps your doctor identify what is affecting your digestive health. Early detection, accurate diagnosis, and timely treatment are key to a full recovery.

At Niva Bupa, we are committed to supporting your health at every step. Our health insurance plans cover diagnostic tests, specialist consultations, and hospitalisation, ensuring that you receive the care you need without financial stress. Taking a proactive approach to your health today can help you avoid more serious complications tomorrow.

FAQs

1. What is the normal range of pus cells in stool?

A count of 0 to 4 pus cells per high-power field (HPF) is generally considered normal in a stool examination. Any count above this range is flagged as abnormal and indicates possible infection or inflammation in the gastrointestinal tract that requires further medical evaluation.

2. Are pus cells in stool always a sign of infection?

Not always. While bacterial and parasitic infections are the most common causes, pus cells can also appear due to inflammatory bowel disease or intestinal tuberculosis. Your doctor will assess your full report and symptoms to determine the exact cause before recommending treatment.

3. Can pus cells in stool resolve on their own?

In mild cases caused by a minor infection, pus cells may reduce with adequate rest and hydration. However, it is always advisable to consult a doctor. Without proper diagnosis and treatment, the underlying cause may worsen and lead to more serious complications over time.

4. Is it safe to eat normally when pus cells are detected in stool?

It is advisable to follow a light, bland diet during this period. Avoid spicy, oily, and high-fibre foods that can irritate your intestines further. Your doctor will guide you on the appropriate diet based on the underlying cause and severity of your condition.

5. Can children have pus cells in their stool?

Yes, children can have pus cells in their stool, often due to bacterial or parasitic infections from contaminated food or water. It is important to consult a paediatrician promptly, as children are more vulnerable to dehydration from associated symptoms like diarrhoea and vomiting.

6. How is a stool sample collected for testing?

A fresh stool sample is collected in a clean, dry, sterile container provided by the laboratory. The sample should ideally be delivered to the lab within one to two hours of collection. Your doctor or the laboratory will provide specific instructions on how to collect and store the sample correctly.

7. Can stress cause pus cells in stool?

Stress alone does not directly cause pus cells. However, chronic stress can weaken your immune system and worsen conditions like inflammatory bowel disease, which may lead to elevated pus cell counts. The presence of pus cells always points to a physical cause that requires medical assessment.

8. What happens if pus cells in stool are left untreated?

Leaving pus cells in the stool untreated can allow the underlying infection or inflammation to worsen. This may lead to complications such as severe dehydration, intestinal damage, spread of infection, or chronic bowel disease. Early diagnosis and appropriate treatment are essential to prevent long-term health consequences.

9. Can I take antibiotics without a prescription if pus cells are found?

No. Self-medicating with antibiotics is strongly discouraged. Not all causes of pus cells in stool respond to antibiotics, and using the wrong medication can lead to antibiotic resistance or worsen your condition. Always consult a doctor for an accurate diagnosis and a proper prescription.

10. How long does it take to recover after treatment?

Recovery time varies depending on the underlying cause. Bacterial infections typically improve within five to seven days of starting antibiotics. Parasitic infections may take slightly longer. Chronic conditions like IBD require ongoing management. Your doctor will guide you on the expected recovery timeline based on your diagnosis.