The Douglas XB-19 was a four-engined, piston-driven heavy bomber produced by the Douglas Aircraft Company for the United States Army Air Forces (USAAF) during the early 1940s. The design was originally given the designation XBLR-2 …

Parvovirus B19 infection is usually mild in people who are otherwise healthy. Common symptoms include "slapped cheek" rash in children, and joint pains in adults. Complications can occur among people with underlying blood disorders or weakened immune system. Infection early during pregnancy can cause a slight increase in the risk of a miscarriage.

Human parvovirus B19, generally referred to as B19 virus (B19V), parvovirus B19[1] or sometimes erythrovirus B19, [2] is a known human virus in the family Parvoviridae, genus Erythroparvovirus; it measures only 23–26 nm in diameter. [3] . Human parvovirus b19 is a below-species classification of Erythroparvovirus primate1. [4] .

Mar 23, 2022 · Operated by a crew of up to 18, the XB-19 was so large that its massive fuselage contained two decks and it had tunnels within the wings so the flight engineer could attend to the engines in flight. The XB-19 could carry up to 36,000 pounds of bombs and had a …

人类细小病毒B19是细小病毒科红视症病毒属病毒，是英国科学家Cossart及其同事于1977年在筛查无症状乙肝患者血清时无意发现的，根据生化及分子生物学特点将其归为细小病毒科。 Human Parvovirus B19. 细小病毒科＞细小病毒亚科＞红视症病毒属＞人细小病毒B19. 由于其是在B组的第19号样品中发现的，故命名为B19病毒。 最初人们认为B19是人群中普遍存在而不致病的一种病毒，但后来发现，B19感染是引起传染性红斑、慢性溶血性贫血患者发生再障危象、免疫抑制患 …

人类微小病毒B19 (Human parvovirus B19,HPV B19。 本文简称B19病毒)是儿科常见的出疹性疾病— 传染性红斑 (又称第五病，Erythema infection,EI)的 病因。 除了这一轻型自限性感染外，B19病毒还可使慢性 溶血病 病人发生再障危象及急性多关节病。 在 免疫缺损 病人中可造成 持续性感染。 如果妊娠期受B19病毒感染，可致流产、死胎和 胎儿水肿 症的发生。 此外它还与多种 造血系统 异常表现如 中性粒细胞减少症 、 血小板减少症 有关。

Nov 1, 2021 · Human parvovirus B19 (B19V) is a human pathogen that belongs to genus Erythroparvovirus of the Parvoviridae family, which is composed of a group of small DNA viruses with a linear single-stranded DNA genome. B19V mainly infects human erythroid progenitor cells and causes mild to severe hematological disorders in patients.

Aug 15, 2024 · P arvovirus B19, a respiratory virus that causes a telltale “slapped-cheek” rash, is on the rise in the U.S., according to an Aug. 13 alert from the U.S. Centers for Disease Control and...

Parvovirus B19 (B19) was discovered serendipitously in 1974 and is the only member of the family Parvoviridae known to be pathogenic in humans. The virus is widespread, and manifestations of infection vary with the immunologic and hematologic status of the host.

Mar 22, 2024 · Parvovirus B19 (B19V) is a single-stranded DNA virus of the family Parvoviridae and genus Erythrovirus. Parvovirus B19 infects only humans. Approximately 60% of adults aged 30 years are immune to...