Incubation period

EA & JB 4 moments of waiting was observed and a bubbling appearance occurred indicating the presence of catalase. For the oxidase test, an ampule of reagent was added to the streak plate of Neisseria sicca culture, with a waiting period to see if there was any color change on the plate. For the starch hydrolysis test, grams of iodine was added to the culture plate to see if any color change will occur. All inoculated plates of the Neisseria sicca were incubated at 37 degrees Celsius…

Introduction This assignment explores several online sources that contain materials on the impact of Legionaries’ Disease to public health and its association with the role of a Public Health Inspector/Environmental Health Officer. Legionaries’ Disease is caused by roughly 35 Legionella bacteria species, with symptoms of severe pneumonia and psychological changes. (Canadian Centre for Occupational Health and Safety, 2015) With an increase of the elderly population in North America and the use…

and more in recent years in Hong Kong. Background information The first outbreak of Legionnaires’ Disease happened in 1976 which found in Philadelphia in the United States and caused 34 people to die. It is an acute bacterial disease, its incubation period is 2-10 days. Thus, the most common transmission of Legionella are disseminate sprays and droplets of water. Not transmitted by contact. Men, over 50 years old, smokers, alcoholics, immunosuppressed patients and immunocompromised patients…

allowed to travel into neighboring states; looters depleted stores while the overall level of safety was in a state of chaos. Money had zero value and a breakdown in government result in an “end of days” community response. The virus had a shift incubation period that in a matter of days took on a pandemic proportion. This was realistic, and has a valid concern for those that are ill prepared for a disaster. The fundamental food, clothing and shelter take on a whole new meaning when disaster…

There are several possible types of terrorist attacks using Weapons of Mass Destruction (WMD), using conventional firearms and explosives, or ”other means of attack (including low-tech devices and delivery, attacks on infrastructure, and cyber terrorism)”, (FEMA, 2002, P. 9). Each type of attack or a combination of several will need its own action plan by emergency managers and emergency responders, making the identification of the type of attack and weapon used critical. If an attack occurs,…

INTRODUCTION Air, water and soil constitute our natural environment but with the increasing population and the prevalent lifestyle, there is a steady strain on the air we breathe, the water we drink and the soil or land on which we live and which provides us livelihood.The Xenobiotic compounds undergo a number of processes in the environment and interact with living entities i.e., cells, organs and tissues, and cause significant impairment of physiological functions. Environmental biotechnology…

During lysogenic cycle the virus can stay inactive for a long period of time inside host cells, though it replicates in virus genes being transmitted to daughter cells of the host. In lytic cycle when the virus enters the host cell then infuses the cell with its genetic material and generates millions of copies of…

Once bitten by an infected mosquito, there is a three to six-day incubation period before symptoms emerge. In mild cases, the resulting fever would have been hard to distinguish from other diseases of the time. In severe cases, however, hemorrhaging can occur, along with “black vomit” and jaundice (Acha and Szyfres 1987)”…

1. Temperature : A temperature is an objective measurement of hot or cold. It is measured by thermometer (Paul S. Welch,1938). Its most common unit is celcius. It is an important physical property of water because temperature controls the rate of most of the chemical reaction. As temperature affects the growth, reproduction and immunity of living organisms, therefore, drastic temperature changes can be fatal to living organisms. 2. pH : pH is a numeric scale used to specify the acidity or…

During this lab, Sfr13 mutant and wild type Tetrahymena’s number of India Ink vacuoles and sizes were observed over multiple trials, and then the averages were compared to see if there was any difference between the mutant and WT. Furthermore, the two strains of Tetrahymena were stained with mCherry fluorescence, so that the oral grooves could be examined and compared under fluorescence microscopy. This experiment was designed to eliminate as much bias as possible by replicating the experiment…