Dengue is the most common infection transmitted by mosquitoes in human beings, which in recent years has become a major international public health problem. It is usually found in tropical and subtropical regions around the world. The incidence of dengue has grown dramatically around the world in recent decades. Over 40% of the world's population is now at risk from dengue. World Health Organization currently estimates that there may be 50–100 million dengue infections worldwide every year.
The first confirmed outbreak of dengue fever in Pakistan was in 1994, but a sudden rise in cases and the annual epidemic trend first occurred in Karachi in November 2005. Since 2010, Pakistan has been experiencing an epidemic of dengue fever that has caused
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Hyperendemicity may occur due to the cocirculation of multiple virus serotypes in the same city. Humans become infected with dengue viruses due to the the bite of an infective mosquito (Gubler, 1998). The principal vector of dengue virus is Aedes agypti which is a domesticated mosquito and prefers to lay eggs in artificial water containers found in and around residential areas, for example, old automobile tires, flower vases, refrigerator trays, coolers and trash. The adult mosquitoes prefer to rest indoor and feed on humans mostly during daylight hours. The two peak timings of biting of this mosquito are early morning and in the afternoon before dusk. The female mosquitoes disrupts the feeding process at the slightest movement but returns to the same or a different person after few moments to continue feeding process. Female Aedes aegypti mosquitoes often feed on several persons during their single blood meal and therefore have tendency to transmit dengue virus to multiple persons in a short time (Putnam etal., 1995 ; Scott etal., 1997) After transmission of virus from insect to human during biting, the virus undergoes 3 to 14 days incubation period after which the person may experience symptoms of dengue fever. During this period dengue virus circulates in the peripheral blood and during this stage if any other Aedes aegypti mosquito bites the ill person then that mosquito may also become infected and subsequently transmits the virus to other uninfected person (Gubler,
The first outbreak occurred in September of 1918 in Quebec. 2. In the fall of 1919, the federal government established the Department of Health. 3. Approximately 50,000 people died from this silent enemy as opposed to 40,000 in the war.
It happened in the bright, hot, dry like the desert in the summer of 1793. If you got infected by yellow fever you must of gotten bit by a tiny, fast flying, loud buzzing mosquitoes. Sadly 2,000 to 5,000 souls died because of this murderous disease. The comparison of the American doctors and French doctors you might believe do show a few similarities.
On Friday, September 9th, Officials in Miami gave the go-ahead to begin aerial spraying the insecticide Naled to interrupt the transmission of the Zika virus being spread by mosquitos. The number of people infected through local transmission in Miami has risen to 15 as of Monday, September 5th. The number of Zika cases nation wide has been confirmed by the Centers of Disease Control and Prevention to be a staggering 1,658 cases. All but one of these cases has been contracted through travel to Zika-infected areas. Over 400 of these confirmed cases involve pregnant women, seventeen of who have given birth to babies with birth defects and five of which have resulted in lost pregnancies.
Mosquitos soon became resistant and the only approach was to use more chemical sprays. Deaths of many birds were due to bio magnification caused by the extraneous amounts of toxins in water. Suzuki acknowledges how his faith on “predictive
These childhood illnesses had grown widespread in most regions other than remote villages, killing one fourth to one half of all children before they turned six years old. However, with the notable exception of influenza, survivors carried some level of immunity, and frequently absolute protection, to the majority of these illnesses. Yellow fever and falciparum malaria likewise made their way across the Atlantic from Africa to the Americas. Falciparum malaria is by far the most severe form of that plasmodial infection. These illnesses circulated throughout Native American communities as epidemics in the centuries following 1492.
One of the biggest summer nuisance would be the mosquito, but more specifically the Ades aegypti mosquito. The Aedes aegypti is the vector for yellow fever and the cause of the numerous deaths. In her book The American Plague: The Untold Story of Yellow Fever, The Epidemic the Shaped Our History, Molly Caldwell Crosby presents the idea that the mosquito is not just the only reason an epidemic occurred in the 18th century. This story accounts for the disease that broke out across the world and nearly destroyed almost all of North America’s population, which some believe could have been avoided by simple quarantine analysis and sanitary methods.
This novel “Fever 1794” gave me the knowledge of the different perspectives of Philadelphia during the yellow fever outbreak. “Fever 1793” is a novel about a girl named Matilda and how she had to go through the deadly, depressing and horrible yellow fever outbreak, which affected her life in many different areas. Yellow fever was a disease that spread across Philadelphia in the late 1790s it was a deadly disease at that time because people didn't know the exact cause and the exact way to cure people who were diagnosed with it. For instance, Dr.Benjamin Rush who was a famous doctor at the time thought bleeding people by cutting a part on their arm so the bad infected blood would come out, many people thought that getting bled would cure them,
Even though no one had cared about how sanitary the city was this was one of the reasons the disease spread. All the rotten foods and dead animals attracted mosquitoes which then spread the disease from one person to the next. Environment around the people did a major part in spreading the deadly
The American doctors couldn’t find the right cure so that was when the French doctors came to America and helped treat the fever. The fever got spread due to infected mosquitoes. Refugees came to America and brought the disease. The American doctors along with the French Doctors had similarities and differences
The major diseases that affected the people in this assigned population and time period are small pox, measles, malaria, influenza, typhus and numerous of other diseases that killed thousands of people often in tandem. Nonetheless, with the foreigner’s arrival the course of history change; to begin with, the aching bones, high fever, burning chest, abdominal pain, consumption, and the headaches all erupted as signs, symptoms, and threats to mortality (Anderson, 2007, p. 148). However, an ancient idea regarding the causation and spread of diseases contemplated that air did not act as a medium for the spread of disease; rather air itself contained miasma or pollutant. Still, medical science deals with the human body in terms of health and its
The reader knows that all was not right in the city because Jim talks about how they had influxes of pigeons and the drought or heat may have been the cause of the fevers. On page 11 in the first paragraph it talks about Catherine LeMaigre and how she was becoming sick. “It was clear that thirty-three-year-old Catherine LeMaigre was dying, and dying horribly and painfully. Between agonized gasps and groans she muttered that her stomach felt as if it were burning up.
My assigned book is the hot zone by Richard Preston, the book demonstrates about a highly contagious and lethal virus that is known as “Ebola virus” that is divided into two types the Ebola Zaire and the Ebola Sudan. The writer also mentioned about other filo viruses such as the Marburg virus and rabies. The hot zone book illustrates the origins of the virus and how it started to disperse from one person to another or from a region to another. And how epidemiologists, scientists and doctors discovered about the origin, structure, the effect on the body, symptoms that it can cause, treatment or cure and the nature of the pathogen. As well as several cases of different patients that had an experience of the disease without knowing the actual
How has the Philadelphia yellow fever epidemic of 1793 change history? An appalling contagious outbreak impacted the colossal city of America and its country’s capital. In the summer of 1793 the weather was brutally humid and mild. Therefore, this infectious disease has initiated in August and is known to be terminated approximately few months later in November. This disease has commenced by mosquitoes and caused a massive amount of deaths.
Zika is a perfect example of how infectious diseases and agents can quickly spread throughout the world due to the ease of travel, and therefore poses a major public health threat. The public health goal is to now figure out how to stop the spread of Zika by possibly eliminating the reservoir and vector, the mosquito. Prevention of Zika also depends on educating at risk populations/geographical areas on the disease and how to avoid becoming infected. There are also a multitude of neglected tropical diseases in parts of the world that receive little attention and therefore little research to prevent mortality and
Malaria is the most common disease in third world countries with a tropical climate; the disease is caused by a parasite called Plasmodium, which is transmitted through the bites of infected mosquitoes. In the human body, the parasites multiply in the liver, and then infect red blood cells. Symptoms of malaria include fever, headache, and vomiting, and usually appear between 10 and 15 days after the mosquito bite. If not treated, malaria can quickly become life-threatening by disrupting the blood supply to vital organs. In many parts of the world, the parasites have developed resistance to a number of malaria medicines.