When is an outbreak not an outbreak?

When is an outbreak not an outbreak? Fit, divergent strains of Mycobacterium tuberculosis display independent evolution of drug resistance in a large London outbreak.

OBJECTIVES To study the evolutionary relationship of Mycobacterium tuberculosis isolates from 13 patients in a large outbreak of isoniazid-resistant tuberculosis in London. METHODS Genotypic and phenotypic susceptibility tests were performed. Molecular genotyping using restriction fragment length polymorphisms and mycobacterial interspersed repetitive units was carried out. Additionally, the ...

How an Outbreak is Investigated

It is worth summarizing and elaborating briefly on the steps (or activities) of outbreak investigation (Exhibit 1-1). Although the steps may not always occur in exactly this order, this is the general pattern of events. It is not unusual for more than one step to be occurring at the same time. Not all lists of outbreak investigation steps are identical, as some steps may be combined into one ov...

Is Really Weather or Tropical Conditions Affects an Outbreak of COVID-19: A Brief Report

Corona viruses are large group of viruses that can cause sickness ranging from normal flu to severe respiratory diseases. The new novel corona virus (nCOV-19) or COVID-19 is a new kind of pandemic virus that did not identified before in humans. Global nations have heightened their surveillance in the quick diagnosis of potential cases across the COVID-19. After it had originated in China more c...

Relapsing Fever, an Outbreak

come "under the observation of the medical officers; then in July the disease broke out with crreat virulence in the schools of the C M S. situated with several industrial workshops and missionaries houses, etc., alongside of the Christian village of Sharanpur, over a mile from the city. The settlement attacked consists of numerous small buildings, boarding schools for boys and girls, normal sc...

An outbreak of acute swine erysipelase in a herd