Bartonellosis is a group of gram-negative intracellular facultative bacterium emerging infectious diseases caused by bacteria belonging to the Bartonella genus. Bartonella includes at least 22 named species of bacteria that are mainly transmitted by carriers (vectors), including fleas, lice, or sandflies. Read More >>>>

Barth Syndrome

Barth syndrome is a genetic ultra-rare, infantile-onset, X-linked recessive metabolic mitochondrial disorder characterized by cardiomyopathy, neutropenia, skeletal myopathy, prepubertal growth delay, and distinctive facial gestalt (most evident in infancy); not all features may be present and mainly affects males. It Read More >>>>

Bardet-Biedl Syndrome (BBS)

Bardet-Biedl syndrome (BBS) is a genetic rare autosomal recessive ciliopathy condition that impacts multiple body systems. It is characterized by heterogeneous clinical manifestations including primary features of the disease (rod-cone dystrophy, polydactyly, obesity, genital abnormalities, renal defects, and learning difficulties) Read More >>>>

Barakat Syndrome

Barakat syndrome, also known as HDR syndrome is a clinically variable (heterogeneous), rare genetic disorder characterized by three characteristics: hypoparathyroidism (H) (decreased function of the parathyroid glands which are small endocrine glands in the neck whose main function is to Read More >>>>

Banti Syndrome

Banti syndrome is a disorder of the spleen, the large, gland-like organ in the upper left side of the abdomen that produces red blood cells before birth and, in newborns, removes and destroys aged red blood cells, and plays a Read More >>>>

Bannayan-Riley-Ruvalcaba Syndrome (BRRS)

Bannayan-Riley-Ruvalcaba syndrome (BRRS) also known as Bannayan-Zonana syndrome, Riley-Smith syndrome, and Ruvalcava-Myhre-Smith syndrome is a rare genetic overgrowth syndrome and hamartomatous with the occurrence of multiple subcutaneous lipomas, macrocephaly and hemangiomas disorder that is present at birth and is characterized by a large head size (macrocephaly), and Read More >>>>

Balo Disease

Balo Disease is also known as Balo disease, encephalitis periaxialis concentrica, leukoencephalitis periaxialis concentric and concentric sclerosis are rare and progressive variants of multiple sclerosis. It usually first appears in adulthood, but childhood cases have also been reported. While multiple Read More >>>>

Baller-Gerold Syndrome

Baller-Gerold syndrome (BGS) also referred to as craniosynostosis-radial aplasia syndrome is a rare genetic disorder that is characterized by craniosynostosis, particularly of the coronal sutures, a dysmorphic face, such as a prominent forehead, ocular proptosis, hypertelorism, and a small mouth, Read More >>>>


Balantidiasis is a rare intestinal infection caused by the bacterium, Balantidium coli, a single-celled parasite (ciliate protozoan) that frequently infects pigs but on occasion (rarely) infects humans. Some infected people may have no symptoms or only mild diarrhea and abdominal Read More >>>>


Babesiosis is a rare infectious disease caused by single-celled microorganisms (protozoa) belonging to the Babesia family. Babesiosis is an infectious disease caused by intraerythrocytic, tick-borne protozoa of the Babesia species. It is believed that the Babesia protozoa are usually carried and transmitted Read More >>>>

Axenfeld-Rieger Syndrome (ARS)

Axenfeld-Rieger syndrome (ARS) is a rare genetic disorder that encompasses anterior segment ocular dysgenesis in addition to systemic abnormalities such as dental, cardiac, craniofacial, and abdominal wall defects as well as other parts of the body. Ocular findings include anterior Read More >>>>

Autosomal Recessive Polycystic Kidney Disease (ARPKD)

Autosomal recessive polycystic kidney disease (ARPKD) is a rare genetic disorder characterized by the formation of fluid-filled sacs (cysts) in the kidneys. Most affected infants have enlarged kidneys during the newborn (neonatal) period and some cases may be fatal at Read More >>>>