{"id":51421,"date":"2025-04-25T21:50:33","date_gmt":"2025-04-26T01:50:33","guid":{"rendered":"https:\/\/www.hancockhealth.org\/mayo-health-library\/group-b-strep-disease\/"},"modified":"2026-02-04T11:58:24","modified_gmt":"2026-02-04T16:58:24","slug":"group-b-strep-disease","status":"publish","type":"mayo","link":"https:\/\/www.hancockhealth.org\/ja\/mayo-health-library\/group-b-strep-disease\/","title":{"rendered":"Group B strep disease"},"content":{"rendered":"<div class=\"container mx-auto   wordpress-block wordpress- core-\">\n<p>Group B strep is a common type of bacteria. Another name for it is Streptococcus agalactiae. It&#8217;s often carried in the intestines or lower genital tract.<\/p>\n<p>It is usually harmless in healthy adults. But in newborns it can cause a serious illness known as group B strep disease.<\/p>\n<p>Group B strep also can cause dangerous infections in adults with some long-term conditions, such as diabetes or liver disease. Older adults have a higher risk of illness from group B strep too.<\/p>\n<p>If you&#8217;re a healthy adult, there&#8217;s nothing you need to do about group B strep. <\/p>\n<p>If you&#8217;re pregnant, get a group B strep screening test during your third trimester. If you have this type of bacteria in your body, medicines called antibiotics given to you during labor can protect your baby.<\/p>\n<h3>Infants<\/h3>\n<p>Most babies born to women carrying group B strep are healthy. But the few who are infected by group B strep during labor can become very ill. Some infections with this type of bacteria can be life-threatening.<\/p>\n<p>In infants, illness caused by group B strep can start within six hours of birth. This is called early onset disease. Or the illness could start weeks or months after birth. This is called late onset disease.<\/p>\n<p>Symptoms might include:<\/p>\n<ul>\n<li>Fever.<\/li>\n<li>Low body temperature.<\/li>\n<li>Trouble feeding.<\/li>\n<li>Sluggishness, limpness or weak muscle tone.<\/li>\n<li>Trouble breathing.<\/li>\n<li>Irritable behavior.<\/li>\n<li>Jittery movements.<\/li>\n<li>Seizures.<\/li>\n<li>Rash.<\/li>\n<li>Jaundice.<\/li>\n<\/ul>\n<h3>Adults<\/h3>\n<p>Many adults carry group B strep in their bodies and have no symptoms. Most often, the bacteria is carried in the bowel, vagina, rectum, bladder or throat.<\/p>\n<p>But sometimes, group B strep can cause a urinary tract infection or other more-serious infections. Symptoms of infections that may be caused by group B strep include the following:<\/p>\n<p>Urinary tract infection<\/p>\n<ul>\n<li>A strong, persistent urge to urinate.<\/li>\n<li>A burning sensation or pain when urinating.<\/li>\n<li>Passing frequent, small amounts of urine.<\/li>\n<li>Urine that appears red, bright pink or cola colored &mdash; a sign of blood in the urine.<\/li>\n<li>Pelvic pain.<\/li>\n<\/ul>\n<p>Blood infection from the bacteria, also called bacteremia<\/p>\n<ul>\n<li>Fever.<\/li>\n<li>Chills.<\/li>\n<li>Confusion or lack of alertness.<\/li>\n<\/ul>\n<p>\u80ba\u708e<\/p>\n<ul>\n<li>Fever.<\/li>\n<li>Chills.<\/li>\n<li>Cough.<\/li>\n<li>Shortness of breath.<\/li>\n<li>Chest pain when you breathe or cough.<\/li>\n<\/ul>\n<p>Skin or soft-tissue infection<\/p>\n<ul>\n<li>Swelling, warmth or a skin color change in the area of the infection.<\/li>\n<li>Pain in the area of the infection.<\/li>\n<li>Sores with pus or drainage.<\/li>\n<\/ul>\n<p>Bone or joint infection<\/p>\n<ul>\n<li>Fever.<\/li>\n<li>Chills.<\/li>\n<li>Swelling, warmth or a change in skin color over the area of the infection.<\/li>\n<li>Pain in the area of the infection.<\/li>\n<li>Stiffness or no ability to use a limb or joint.<\/li>\n<\/ul>\n<p>If you have symptoms of group B strep infection, call a member of your health care team right away. This is especially important if you have any of the following risk factors:<\/p>\n<ul>\n<li>You&#8217;re pregnant.<\/li>\n<li>You have an ongoing medical condition.<\/li>\n<li>You&#8217;re older than 65.<\/li>\n<\/ul>\n<p>If you think your infant has symptoms of group B strep disease, call your baby&#8217;s health care professional right away.<\/p>\n<p>Many healthy people carry group B strep bacteria in their bodies. You might carry the bacteria in your body for a short time. It can come and go. Or you might always have it. Group B strep bacteria are not spread through sex, food or water. It isn&#8217;t clear how the bacteria are spread to anyone other than newborns.<\/p>\n<p>Group B strep can spread to a baby during a vaginal delivery. This happens if the baby is exposed to &mdash; or swallows &mdash; fluids that contains the bacteria.<\/p>\n<h3>Infants<\/h3>\n<p>An infant born prematurely, meaning earlier than 37 weeks, has a higher risk of getting group B strep disease.<\/p>\n<p>A baby&#8217;s risk also goes up if the pregnant parent has:<\/p>\n<ul>\n<li>Group B strep in the body.<\/li>\n<li>Breaking of the waters 18 hours or more before the baby is delivered.<\/li>\n<li>An infection of the placenta and amniotic fluid, called chorioamnionitis.<\/li>\n<li>A urinary tract infection during the pregnancy.<\/li>\n<li>A temperature higher than 100.4 F (38 C) during labor.<\/li>\n<li>Previously given birth to an infant with group B strep disease.<\/li>\n<\/ul>\n<h3>Adults<\/h3>\n<p>Adults age 65 and older have a higher risk of group B strep disease.<\/p>\n<p>The risk is also higher for adults who have a condition that weakens the immune system or other serious diseases, such as:<\/p>\n<ul>\n<li>\u7cd6\u5c3f\u75c5\u3002<\/li>\n<li>HIV.<\/li>\n<li>Liver disease.<\/li>\n<li>Heart disease.<\/li>\n<li>Cancer or a history of cancer.<\/li>\n<\/ul>\n<p>Group B strep infection can lead to life-threatening disease in infants, including:<\/p>\n<ul>\n<li>Pneumonia.<\/li>\n<li>Inflammation of the membranes and fluid that surround the brain and spinal cord, called meningitis.<\/li>\n<li>Infection in the bloodstream, called bacteremia.<\/li>\n<\/ul>\n<p>If you&#8217;re pregnant, group B strep can cause the following:<\/p>\n<ul>\n<li>Urinary tract infection.<\/li>\n<li>Infection of the placenta and amniotic fluid, called chorioamnionitis.<\/li>\n<li>Infection of the membrane lining the uterus, called endometritis.<\/li>\n<li>Bacteremia.<\/li>\n<\/ul>\n<p>If you&#8217;re an older adult or you have a chronic health condition, group B strep bacteria can lead to any of the following conditions:<\/p>\n<ul>\n<li>Skin infection.<\/li>\n<li>Bacteremia.<\/li>\n<li>Urinary tract infection.<\/li>\n<li>Pneumonia.<\/li>\n<li>Bone and joint infections.<\/li>\n<li>Infection of the heart valves, called endocarditis.<\/li>\n<li>Meningitis.<\/li>\n<\/ul>\n<p>If you&#8217;re pregnant, the American College of Obstetricians and Gynecologists recommends a group B strep screening test during weeks 36 to 37 of pregnancy. Talk to your health care professional about when to get screened if you live outside of the U.S.<\/p>\n<p>During the screening test, a member of your health care team takes swab samples from your vagina and rectum. Then the samples are sent to a lab for testing. <\/p>\n<p>A &#8220;positive&#8221; test result means that you carry group B strep. It doesn&#8217;t mean that you&#8217;re ill or that your unborn baby will be affected. But you do have a higher risk of passing the bacteria to your baby.<\/p>\n<p>Medicine can prevent group B bacteria from spreading to your baby during labor or delivery. An antibiotic through a needle in a vein, also called an IV, is given to you when labor begins. The antibiotic is usually penicillin or a related medicine.<\/p>\n<p>If you&#8217;re allergic to penicillin or related medicines, you might receive another antibiotic such as clindamycin or vancomycin instead. But it&#8217;s not clear how well these other antibiotics work.<\/p>\n<p>For that reason, your newborn&#8217;s health care team closely watches the baby&#8217;s health for up to 48 hours.<\/p>\n<p>Taking antibiotics by mouth ahead of time won&#8217;t help lower the risk of passing the bacteria to your baby. That&#8217;s because the bacteria can return before labor begins.<\/p>\n<p>Antibiotic treatment during labor also is recommended if you:<\/p>\n<ul>\n<li>Have a urinary tract infection.<\/li>\n<li>Delivered a previous baby with group B strep disease.<\/li>\n<li>Get a fever during labor.<\/li>\n<li>Haven&#8217;t delivered your baby within 18 hours of your water breaking.<\/li>\n<li>Go into labor before 37 weeks and haven&#8217;t been tested for group B strep.<\/li>\n<\/ul>\n<h3>Vaccine in development<\/h3>\n<p>Although it&#8217;s not available yet, researchers are working on a group B strep vaccine. It could help prevent group B strep infections in the future.<\/p>\n<p>If your newborn might have group B strep disease, a sample of your baby&#8217;s blood or spinal fluid likely will be taken. A lab checks the sample for the bacteria that causes the infection.<\/p>\n<p>If your baby appears ill, the baby might be given other tests, including:<\/p>\n<ul>\n<li>Urine culture.<\/li>\n<li>Lumbar puncture.<\/li>\n<li>Chest X-ray.<\/li>\n<\/ul>\n<p>For adults who have an infection, a blood test can find out if group B strep is the cause. Learning the cause may be important for figuring out the right treatment.<\/p>\n<h3>Infants<\/h3>\n<p>If your baby tests positive for group B strep, the baby receives IV antibiotics through a vein. Depending on your baby&#8217;s condition, the baby might need IV fluids, oxygen or other medicines.<\/p>\n<h3>Adults<\/h3>\n<p>Antibiotics can treat group B strep infection in adults. The choice of antibiotic depends on the location and extent of the infection. It also depends on your specific circumstances.<\/p>\n<p>If you&#8217;re pregnant and you have medical problems because of group B strep, you&#8217;ll likely receive antibiotics by mouth. Most often, you&#8217;ll be given penicillin, amoxicillin (Amoxil, Larotid) or cephalexin. All are considered safe to take during pregnancy.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>This common type of bacteria is often harmless in healthy adults. But it can cause serious illness in newborns and adults with certain long-term conditions, such as diabetes.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","tags":[1686,1685,1682],"class_list":["post-51421","mayo","type-mayo","status-publish","hentry","tag-anatomical-structure","tag-condition","tag-person-group-concept","content_type-diseases-conditions"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Group B strep disease - Hancock Health<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hancockhealth.org\/ja\/mayo-health-library\/group-b-strep-disease\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Group B strep disease - Hancock Health\" \/>\n<meta property=\"og:description\" content=\"This common type of bacteria is often harmless in healthy adults. 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