Gram-positive bacterial infections

This trial tests a new pneumococcal vaccine, called PG4, in adults aged 18 to 49. Researchers compare three batches of PG4 to each other and to the current vaccine, Prevnar 20, to see if they produce similar immune responses and are equally safe. Participants receive one injectio…

This phase 3 trial tests a new combination vaccine called BK1803 in healthy infants aged 2 to 7 months. The vaccine aims to protect against six diseases: whooping cough, diphtheria, tetanus, polio, hepatitis B, and Haemophilus influenzae type b. Researchers compare BK1803 to a st…

This first-in-human study tests a new microneedle patch (Miracus) that dissolves in the skin to deliver a tetanus vaccine without a needle. Thirty healthy adults will receive either an empty patch or one loaded with vaccine. Researchers will check safety, tolerability, and whethe…

This study tests a new vaccine called TdaP2gen in 320 pregnant women in Thailand to see if it safely protects their babies from tetanus, diphtheria, and whooping cough. The vaccine is given during pregnancy, and researchers measure antibody levels in mothers and infants up to 18 …

This study tests a new vaccine to protect babies against pneumococcal infections, which can cause pneumonia and meningitis. About 500 healthy infants will receive either the new vaccine or an existing one. Researchers will check if the new vaccine triggers a strong immune respons…

This early-stage trial is testing a new combination vaccine that protects against whooping cough, diphtheria, and tetanus (Tdap) in people aged 10 and older. Researchers want to see if different doses are safe and trigger an immune response. The study involves 96 volunteers and c…

This study tests a new version of the Tdap vaccine (which protects against tetanus, diphtheria, and whooping cough) that has reduced antigens. The goal is to see if it is safe and triggers a strong immune response in people aged 6 and up. Around 660 volunteers will receive either…

This study tests whether a pneumococcal vaccine (Pneumosil) can produce a strong immune response in children aged 6-59 months who are hospitalised with severe acute malnutrition. Half the children will receive the pneumococcal vaccine, and the other half will receive a typhoid va…

This early-stage trial tests an oral capsule containing a genetically modified probiotic yeast designed to neutralize toxins produced by C. diff bacteria. The study first evaluates safety in healthy adults, then in people at risk for recurrent C. diff infection. Participants take…

Researchers are testing a new immunotherapy called Lm-LLO-TT in adults with advanced pancreatic ductal adenocarcinoma that has already been treated with chemotherapy. Lm-LLO-TT uses a weakened form of Listeria bacteria engineered to carry a tetanus toxoid antigen, aiming to spark…

Researchers are testing an experimental antibody called EA5 in adults with generalized myasthenia gravis whose blood contains antibodies against the acetylcholine receptor and who have not tried complement inhibitor drugs. EA5 targets complement protein C5, part of the immune cas…

This trial tests whether a dietary fiber called resistant potato starch can reduce the amount of drug-resistant bacteria living in the gut. The study enrolls Veterans who carry these bacteria without symptoms, and half will take the starch daily while the other half takes a place…

This early-stage study tests a new pneumococcal vaccine (Pn-MAPS30plus) in 60 healthy infants to see if it is safe and what side effects it may cause. Babies will receive three doses starting around 2 months old, followed by a booster at 12-15 months. The study compares the new v…

This pilot study tests a long-acting antibiotic called oritavancin for treating gram-positive heart infections, such as infective endocarditis. The goal is to see if weekly IV doses can replace the usual weeks-long hospital stays and daily antibiotics. The study will enroll 20 ad…

This study tests whether wearing compression stockings alone can prevent repeat episodes of erysipelas (a bacterial skin infection) as well as the usual approach of antibiotics plus stockings. About 200 adults who have had at least two infections in the same leg will be randomly …

This study tests whether canagliflozin, a diabetes drug, can reduce dangerous brain swelling and bleeding in people who have had a severe stroke and are receiving clot-removal therapy. About 150 adults will be randomly assigned to take the drug for 14 days or receive standard car…

This study tests if xylitol, a common sweetener, can safely clear C. difficile bacteria from the gut in people with inflammatory bowel disease (IBD). About 99 adults with mild or inactive IBD will take either a low or high dose of xylitol or a placebo for four weeks. Researchers …

This study will evaluate how well the drug raxibacumab works and how safe it is for people who have symptoms of inhalational anthrax after a large-scale exposure, such as a bioterrorist attack. Up to 100 people of all ages, including pregnant women and children, who receive the d…

This study follows up to 10 people with severe anthrax who receive a treatment called AIGIV. Researchers will track how many patients survive and whether the drug causes serious side effects. The goal is to learn more about how well AIGIV works and how it behaves in the body.

This study will test a medicine called AIGIV for people who have breathed in anthrax germs during a large-scale emergency. The goal is to see if the drug helps more people survive and to check for side effects. The study will only start if a major anthrax event happens, and it wi…

This pilot study tests whether xylitol, a common sugar alcohol, can safely clear C. difficile bacteria from the guts of people with inflammatory bowel disease (IBD). About 69 adults with mild or inactive IBD will take different doses of xylitol for up to 8 weeks. Researchers will…

This study compares two antibiotics, fidaxomicin and vancomycin, to see which one is better at clearing C. difficile bacteria from the gut in people with inflammatory bowel disease (IBD). About 60 adults with IBD will take one of the two antibiotics for 10 days and be followed fo…

This study aims to create a quick, non-invasive test using saliva to see if someone has enough antibodies to fight tetanus. Instead of drawing blood, a small saliva sample on a test strip would give results in 10-15 minutes. The test is designed for low- and middle-income areas w…

This study tests whether a simple WhatsApp message reminding people turning 65 in Chile to get their free pneumococcal vaccine can increase vaccination rates. Over 43,000 adults will be randomly assigned to receive the reminder or not, and researchers will track who gets vaccinat…

This large trial will study whether flu and pneumonia vaccines can reduce serious flare-ups and medical costs in people aged 45-80 with COPD. About 7,000 participants will be split into four groups: flu vaccine, pneumonia vaccine, both, or no vaccine. Researchers will track lung …

This study tests a new medicine called SNA02-48 to see if it can prevent tetanus in people who have had a high-risk wound, like a deep cut or puncture from a dirty object. About 600 adults will receive either the new injection or the standard treatment (human tetanus immunoglobul…

This study compares two schedules (2+1 vs 3+1 doses) of a 13-valent pneumococcal vaccine in 210 healthy infants starting at 2 months old. Researchers will measure antibody levels and track side effects to find the best way to prevent pneumococcal infections.

This early-phase trial tests whether adding Ursodeoxycholic Acid (UDCA) to standard antibiotics can prevent Clostridioides difficile (C. diff) infection from returning. About 30 adults with C. diff and risk factors for recurrence will take UDCA three times daily for up to eight w…

This study will look at 250 people who received the CYFENDUS anthrax vaccine after being exposed to anthrax bacteria during a mass event. Researchers want to see if the vaccine, given along with antibiotics, can prevent inhalational anthrax and anthrax meningitis. The study is ob…

This study tests whether a probiotic called Clostridium butyricum CBM588 can reduce diarrhea and improve quality of life in people who have had their pancreas removed due to cancer or other growths. About 158 patients will take either the probiotic or a placebo for three months a…

This study tests whether using a cold spray or a Buzzy device (a vibrating cold pack) can reduce pain and fear during penicillin injections. Ninety adults receiving intramuscular penicillin will be randomly assigned to one of three groups: cold spray, Buzzy device, or standard ca…

Researchers are studying where the bacteria that infect skin sores come from in people with scabies or atopic dermatitis. They will compare bacteria grown from infected skin lesions with bacteria from nasal swabs to see if the same species appear in both places. A group of health…

Researchers in Panama survey adults age 50 and older about pneumococcal disease and the PCV21 vaccine, which protects against pneumonia and other serious infections. One group covers ages 50 to 64; another covers adults 65 and older plus a caregiver who helps them. Each person an…

This study checks how long protection from a tetanus vaccine lasts. Researchers take blood samples from 240 people who received the vaccine or a control in an earlier trial, 2.5 years after their shots. They measure antibody levels to see if they still meet protective thresholds.…

This study follows 100 infants who received a pneumococcal vaccine in an earlier trial. Researchers will take a small blood sample to measure antibody levels one and two years after vaccination. The goal is to see how long protection against pneumococcal infections lasts. No new …

This study follows 160 people who previously received a 5-component DTP vaccine (protecting against diphtheria, tetanus, and pertussis) to see how long their immune protection lasts. Blood samples are taken at 2.5, 5, and 10 years after vaccination to measure antibody levels. The…

This observational study looks at whether children aged 3 months to 16 years are more likely to complete their full course of antibiotics when prescribed at a primary care clinic versus a hospital emergency department. Researchers surveyed parents by phone after treatment ended t…

This study looks at adults who had a C. diff infection and were treated with either a fecal transplant (FMT) or antibiotics alone. Researchers want to see if FMT leads to healthier gut bacteria and fewer health problems years later. Participants will give blood, stool, and urine …

This observational study will follow up to 10 people in the U.S. who have a confirmed case of systemic anthrax and are treated with the drug raxibacumab. Researchers will track survival, side effects, and drug levels in the blood to better understand how well the treatment works.…

This study looks at how certain immune cells, called MAIT cells, behave in people with hidradenitis suppurativa (HS), a painful skin condition. Researchers will take skin and blood samples from 45 adults with HS and compare them to samples from people with other skin diseases. Th…