Neosporosis An Infectious Disease - 1102 Words

Neosporosis is an infectious disease prominent in both livestock and companion animals. Neosporosis was first discovered in dogs in Norway in 1984, when it caused neuromuscular degeneration that lead to hind limb paralysis. Due to the similarity of Neospora caninum to Toxoplasma gondii, neosporosis was misidentified as toxoplasmosis for many years. The two share similar life cycles and structure but vary when it comes to hosts. N. caninum thrives in cattle, dogs and related canids whereas T. gondii thrives in humans, sheep, and goats, and felids (usda). In 1988, the description of the new genus and species Neospora caninum was released, ending the misdiagnosis. Since then, neosporosis has become a serious disease for dogs and cattle†¦show more content†¦Natural infections have been observed in dogs, cattle, sheep, goats, horses, and deer. In the lab, researchers have successful induced infections in mice, rats, dogs, foxes, goats, cats, sheep, coyotes, pigs, gerbils, rabbits , sheep, and cattle (a review). This coccidian parasite is spread transplacentally with vertical route being the most common source of transmission in cattle. This route is made possible by N. caninum’s life cycle that consists of three infectious stages: tachyzoites, tissue cysts, and oocysts. The dog (the definitive host) ingests the tissue cysts found in the intermediate host and when these tissue cysts reach the gut the parasite starts a new life cycle. This cycle produces unsporulated oocytes which are then excreted in the dog’s feces, and absorbed into the environment (soil, water, and feed). In the environment the oocysts quickly sporulate. Herbivores, such as a cow, then ingest the contaminated feed or water and become infected. Systemic Effects: Etiology and Impacts Dams infected with N. caninum pass on tachyzoites through the placenta, infecting the fetus (Neosporosis in cattle Jp). Inside the fetus, the tachyzoites invade neural stem cells, transforming them into bradyzoites which allows them to slowly divide and reproduce asexually. These â€Å"bradyzoites form tissue cysts around themselves for protection† and lay dormant until the immune system of the fetus is suppressed. When this occurs they

The Right Of A Gun Is Far Too Lenient - 1321 Words

People believe that the difficulty to acquire a gun is far too lenient. Since the birth of America, gun rights have been added to the law of the land, the Constitution. Gun rights were added to a section along with other basic human rights called the Bill of Rights: restrictions of the government s power. This Gun right that allows us to own firearms is known as the Second Amendment. It states â€Å"...the right of the people to keep and bear arms, shall not be infringed†. Many people believe that none of the ten amendments of the Bill of Rights should change. Let s not change the Bill of rights, let s just make America safer and stricken the gun laws, I have gathered two helpful sources that will support my claim for my Junior Project; one†¦show more content†¦Ã¢â‚¬Å"Most gun owners buy their guns legally and use them safely, whether for self-defense, hunting, or sport shooting. Yet too often, irresponsible and dangerous individuals have been able to easily get their hands on firearms, we must strengthen our efforts to keep guns from falling into the wrong hands† (whitehouse.gov, President Obama). He believes the absolute most essential thing we can do to stop firearm brutality and mass shootings, similar to the one in Newtown, Connecticut, is to ensure the individuals who commit acts of violence cannot access guns. Although that statement is very vague, there are some steps that can be made in order to decrease the occurring of these types of events. The National Instant Criminal Background Check System or the NICS, established in 1998 by the Brady Law, is a background check system that determines if a gun should be sold to a specific person. â€Å"NICS is used by Federal Firearms Licensees (FFLs) to instantly determine whether a prospective buyer is eligible to buy firearms† (fbi.gov). The NICS has a guarantee that weapons will not be sold to those who are banned from purchasing them, including criminals. In the course of the mos t recent 18 years NICS has kept more than â€Å"1.5 million† (fbi.gov) weapons out of the wrong hands. President Obama believes we have to reinforce the framework that requires each firearm purchaser to have a background check. In the Newtown, Connecticut shooting, the weapon used was

Biology 3.3 Dna Structure Free Essays

3. 3 7. 1 DNA Structure Worksheet 1. We will write a custom essay sample on Biology 3.3 Dna Structure or any similar topic only for you Order Now Draw and label the structure of a simplified single nucleotide, including sugar, phosphate and base. 2. Complete the table below to show the pairings of the bases in DNA: Purine| Pyrimidine| Adenine| Thymine| Guanine| Cytosine| 3. Where would one find the base uracil? RNA, it replaces thymine 4. In the space below, draw a single strand of three nucleotides, naming the bonds between them and showing the correct relative position of these bonds. The sequence of these bases makes up the genetic code. The red linesrepresent covalent bonds. They are read in groups of three called triplets. These triplets arethen used to send instructions in the cell: to switch genes on and off. 5. Define the term double helix. The term double helix is two strands of DNA that twist around each other. Anti-Parallel 6. In the space below, draw a section of DNA, showing two anti-parallel strands of three nucleotides. Label the bonds which hold the bases together as well as the correct complementary base pairs. Also include the 3’ and 5’ linkages (and ends), and the distinction between purines and pyramidines. . Explain the relevance of the following in the double-helix structure of DNA: a. Complementary base pairing Complementary base pairing is when G only bonds with C and T only bonds with A and these are found on each strand of the double helix b. Hydrogen bonds Hydrogen bonds between the bases hold together the strands of DNA c. Relative positioning of the sugar-phosphate backbone and the bases The relative positioning of the sugar-phosphate backbone are on the outside and the bases are on the inside of the double helix 8. In the space below, draw the structure of a simplified nucleosome, including the H1 linker and histone proteins. 9. Nucleosomes allow the DNA to be supercoiled. a. What is the approximate length of the DNA strand in one chromosome? The length is (length of 1 bp) (number of bp per cell) which is 2 meters. b. During which phase of the cell cycle is DNA most likely to be supercoiled? Prophase c. Outline how nucleosomes help regulate transcription. 10. Distinguish between unique or single-copy genes and highly repetitive sequences: Single-copy genes| Highly-repetitive sequences| . 5% of genome makes polypeptides. Each codon (mRNA) (3 bases) codes for one amino acid. 3% codes for ‘on/off’ gene switches. Within each eukaryotic genes there are:Exons (coding regions)Introns (non-coding regions which are edited out)  Ã‚  Every gene has a ‘switch’, for example a skin cell will turn off unnecessary genes so it does not perform the wrong activity (e. g. producing bloo d)  | Makes up about 5% – 45% of the genome. Once called junk DNAAlso known as satellite DNA, each repeated sequence can be 5-300 base pairsHRSs are used in genetic fingerprinting. This is because they accumulate mutations rapidly| Not all of the base sequences in DNA are translated. Highly repetitive base sequences are not translated. They consist of sequences of between 5 and 300 bases that may be repeated up to 10 000 times. They constitute 5-45% of eukaryotic DNA. Single-copy genes or unique genes are translated and constitute a surprisingly small proportion of eukaryotic DNA. 11. Distinguish between introns and exons in eukaryotic genes. Exons (coding regions) Introns (non-coding regions which are edited out) How to cite Biology 3.3 Dna Structure, Papers

Cars Enslave Us Rather Than Liberate Us free essay sample

Cars have been in use since the year 1870. Since then their number on the roads has increased many times over. They also went through a lot of changes, both on the outside as well as on the inside. That’s why I definitely agree with this statement, and there are many reasons why. Firstly I firmly believe that people must work much harder in order to afford a car. Because they are not only expensive to buy, but also cost a lot to run. Nowadays the gas price gets higher and higher and also not to mention how much it costs to fix the damages if you break your car. That’s why I am inclined to believe that one has to work more hours if he wants to have a car and still be able to live a decent life. Secondly, I think that people who own cars are worried about them, especially when their cars being stolen or damaged. We will write a custom essay sample on Cars Enslave Us Rather Than Liberate Us or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page In order to cope with this worry, they have to install expensive alarm systems and, to make matters worse, car-owners have to avoid areas of the city where cars get broken into or stolen. Thirdly, I am convinced that an additional disadvantage of the cars is that the quality of life in our cities is made worse because of them. The toxic gases that cars eliminate pollute the air we breathe and this seems to threaten our lives every day. On the other hand, there are a lot of advantages of the cars. For example, you can set off to any place you want no matter what time of the day and if there is any public transport to there. Another advantage in my view that cars are very helpful in carrying things from one place to another. For instance, what would the pizza delivery boy do without a car? To conclude, it is clear that cars seem to have made our live easier and more convenient. And I feel that, in spite of all their disadvantages people will still use cars many years from now on. Otherwise, can you imagine the world without cars? But nevertheless in my opinion more cars give us much more problems than they solve and enslave us rather than liberate. Cars enslave us rather than liberate us free essay sample Cars enslave us rather than liberate us opinion essay For the past decades cars have become an Indispensable part of our dally life. It Is almost impossible for us to imagine an existence without them. Nonetheless, in my view they do not only fulfil their positive role of enabling us to reach our destination faster. On the contrary, they tend to make our lives unbearable and they seem to be a necessary evil for the majority of society. To begin with, it seems to me that it requires a lot of effort and money to afford a car. Not only the purchase of a car Is xpensive but also it is inevitable that, as you already are the owner of a dream vehicle, you are bound to be prepared for neverendlng expenses which need to be covered during all the duration of possesing your machine. Cars can be compared to people who demand water in order to survive. We will write a custom essay sample on Cars enslave us rather than liberate us or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The price of fuel is exorbitant, but unfortunately we do not have Influence on It. Secondly. one of the main reasons for the cars to be limited is that the quality of life in our cities and In the suburbs became worse owing to the fact that there Is a surplus of vehicles on our streets. For nstance, there are permanently traffic Jams on one of the the main access roads to Warsaw, namely on a route from Krak ¶w/Katowice. This situation causes a lot of Inconvenience and frustration. both for drivers and for people who travel to Warsaw where they work. It also needs to be stated that cars produce a vast number of pollution making each city a worse place to live. The number of cars In big cities should be therefore restricted, as it is solved in other countries thanks to higher charges ot parking in the city. The role of a government should be to prepare an appropriate plan which will be put Into effect. Thirdly, since the cars cost a lot of money their owners are worried about them being stolen or damaged. In order to cope with this worry they have to Install expensive alarm systems and, to make matters worse, car-owners need to avoid places where they could fall victims to the theft of ones beloved machine. In contrast, there is obviously one vital thing which makes cars useful. It is possible to go to the far places and realise ones wishes concerned with our travel destination that you could not do in any other way. To be more precise, you can decide to prepare almost any trip on the spur of the moment. Having car in such a situation makes us independent of a public transport which, in fact, has a Ilmlted range of places which you can reach. Taking all the points Into consideration, I would say that the role of cars is undeniably of extensive importance. The arguments against these vehicles should also be considered as a way to improve our living conditions. Car Is a facilitation without which it would not be possible to live in the twenty-first century. Nevertheless, it might sometimes be a good idea to think, for Instance, of ones health and make a trip by bicycle Instead. (530 words) ton Cars enslave us rather than liberate us By polishmind For the past decades cars have become an indispensable part of our daily life. It is requires a lot of effort and money to afford a car. Not only the purchase of a car is vehicle, you are bound to be prepared for neverending expenses which need to be unfortunately we do not have influence on it. Secondly, one of the main reasons for the cars to be limited is that the quality of life in our cities and in the suburbs became worse owing to the fact that there is a surplus of vehicles on our streets. For inconvenience and frustration, both for drivers and for people who travel to Warsaw ollution making each city a worse place to live. The number of cars in big cities charges of parking in the city. The role of a government should be to prepare an appropriate plan which will be put into effect. Thirdly, since the cars cost a lot of cope with this worry they have to install expensive alarm systems and, to make fact, has a limited range of places which you can reach. Taking all the points into our living conditions. Car is a facilitation without which it would not be possible to think, for instance, of ones health and make a trip by bicycle instead.