plague is an infectious disease transmitted from rodents to humans. this disease is considered an endemic disease in western iran. the last officially reported case of human plague in iran was in 1965. in the last few decades, human plague has been reported in iran’ neighboring countries. also, according to some recent evidence witnessing infected rodents in western iran, it is probable to have...

in the world history, from ancient times up to now, the plague has been followed by heavy casualties on human societies and social order. one of the deadliest plagues is the great plague of the middle ages, or so-called black death. this plague, in the eighth and ninth ah (fourteenth and fifteenth century ad) swept over some large areas of asia, especially the middle east, as well as europe, an...

timurid era in iran is equivalent to starting the renaissance. black death plague epidemic that is to say, at this time has happened. in one and a half-century timurid rule, several large outbreaks of plague in iran has emerged. the adverse effects of changes in population structure caused many historians point out these conditions in their works.   the literature review shows that, unlike phys...

The plague of Athens raged for 4 years and resulted in the defeat of Athens. The cause of the plague of Athens continues to be debated. Infectious diseases most often cited as causes of the plague include influenza, epidemic typhus, typhoid fever, bubonic plague, smallpox, and measles. Thucydides provides the only available description of the plague of Athens. Given the nuances of the translati...

Domestic fleas were collected in 12 villages in the western Usambara Mountains in Tanzania. Of these, 7 are considered villages with high plague frequency, where human plague was recorded during at least 6 of the 17 plague seasons between 1986 and 2004. In the remaining 5 villages with low plague frequency, plague was either rare or unrecorded. Pulex irritans, known as the human flea, was the p...

A 56-year time series of human plague cases (Yersinia pestis) in the western United States was used to explore the effects of climatic patterns on plague levels. We found that the Pacific Decadal Oscillation (PDO), together with previous plague levels and above-normal temperatures, explained much of the plague variability. We propose that the PDO's impact on plague is conveyed via its effect on...

Yersinia pestis is the causative agent of plague, an enzootic vectorborne disease usually infecting rodents (rats) and fleas. Humans can become infected after being bitten by fleas that have fed on infected rodents. In humans, the disease usually occurs in the form of bubonic plague. In rare cases, the infection spreads to the lungs via the bloodstream and causes secondary pneumonic plague. Per...

Plague occurs episodically in many parts of the world, and some outbreaks appear to be related to increased abundance of rodents and other mammals that serve as hosts for vector fleas. Climate dynamics may influence the abundance of both fleas and mammals, thereby having an indirect effect on human plague incidence. An understanding of the relationship between climate and plague could be useful...

A natural focus of plague exists in the Western Usambara Mountains of Tanzania. Despite intense research, questions remain as to why and how plague emerges repeatedly in the same suite of villages. We used human plague incidence data for 1986-2003 in an ecological-niche modeling framework to explore the geographic distribution and ecology of human plague. Our analyses indicate that plague occur...