Bacterial skin infections

Author: Dr Amanda Oakley, Dermatologist, Waikato Hospital, Hamilton, New Zealand, 2002.

Bacterial skin infections — codes and concepts


Some细菌live on normal skin和cause no harm, such as some Staphylococcus species, Corynebacterium spp., Brevibacterium spp and Acinetobacter. Propionibacteria live in the头发folliclesof adult skin and contribute to粉刺。See DermNet's page on the微生物found on the skin

Some bacteria invade normal skin, broken skin from湿疹/皮炎要么伤口s(导致伤口感染). Bacteria, like病毒也可能有时会导致exanthems.(rashes).

Which bacteria cause skin infection?



Corynebacterium species


打钩-borne细菌l感染s include:

Other conditions sometimes caused by or associated with bacterial infection include:

Which tests should be done?

Laboratory tests for bacterial infectionsmay include:

  • 全血计数:细菌感染常常提高白细胞计数随着增加的增加中性粒细胞
  • C-reactiveprotein(CRP.): elevated > 50 in serious bacterial infections
  • ProCalcitonin:血液测试标记generalised败血症due to bacterial infection
  • 血清学: tests ten days apart to determine immune response to a particular要么ganism
  • Polymerase chain reaction(PCR)和特定的ELISA测试生物
  • Blood文化: if high fever > 38C
  • A swab of the inflamed site, such as throat, skin lesions for culture.

How are bacterial infections treated?

轻微的细菌感染可能在没有治疗的情况下解决。然而,persistent和serious bacterial infections are treated with抗生素。这些可供选择localised采用 (面霜, gels,solutions), such as痤疮的抗生素, or as systemic treatment as tablets, capsules andintramuscular或静脉注射。

最好采取样品来测试哪种有机体在开始之前对感染负责感染。如果感染是严重的(例如,如果脑膜炎球菌病is suspected), immediate treatment with a broad-spectrum antibiotic may commence. Once the specific organism causing infection has been determined, the antibiotic may be changed to a narrow-spectrum antibiotic directed against this organism.

Antibiotics have important individual risks and societal impact and should not be prescribed or taken if they are not required or if they are unlikely to be of benefit, for example, if the infection is viral in origin.Adverse reactions包括皮肤effects

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