eChapters

Semen dilution/ extension is done to meet the following objectives

1.    To preserve the fertilizing potential of semen for a long period of time

2.    To increase the number of services per ejaculate. Ideally approximately 500 cows/ buffaloes can be inseminated from diluted/ extended semen of  a single ejaculate.

3.    Extenders provide the spermatozoa with a medium in which they are able to remain viable and fertile for a prolonged time period.

In order to be an ideal extender, it should be able to provide conducive environment to prolong sperm survival and modify the sperm structure to prepare them for freezing through the following properties:

1.    It should be isotonic with blood and should maintain this during preservation.

    ·    Radiology (Roentgenology): the science, which deals with diagnostic (radio-diagnosis) and therapeutic applications (radiotherapy) of radiant energy particularly of X-rays.

    ·    Veterinary radiology: the science, which deals with the uses of radiant energy for diagnostic (radio-diagnosis) and therapeutic applications (radiotherapy) in domestic, zoo, laboratory, exotic animals and birds.

    ·    Veterinary radiologist: a qualified person in radio-diagnosis and radiotherapy.

    ·    Radiography: is the making of film records (radiographs) of internal structures of the body by passing X-rays through the body to act on specially sensitized film.

While collecting and processing semen the following points needs to be considered:

1.    Good quality Artificial Vagina (AV) should be used for semen collection. Strict hygiene should be maintained while collecting semen.

2.    Highly scientific and flawless collection technique should be used for semen collection.   

3.    Neat semen should be maintained at close to body temperature.

4.    Semen should not come in contact with any contaminant such as lubricant, dust, infection etc. in the collection yard or in any stage of semen processing.

5.    Direct exposure of semen to sunlight or cool white fluorescent light should be avoided as it may cause chromosomal damage.

6.    Enclose all cool white light sources e.g. laminar flow hood, cold room etc. in gold or orange sleeves that absorb ultraviolet and low wavelength visible light (< 475 to 500 nm).

    1.    X-ray beam collimators: Comprised of 2 independently-acting sets of adjustable lead shutters. These are the devices made of lead and are used to restrict X-ray beam up to a desire area. In diagnostic radiology they are essential for safety of the patients, and persons and also to prevent fogging of films due to unnecessary radiations. The collimator is the most effective of beam limiting devices.

• General considerations

 • First hand information and constitution of a team

 • Gathering the disease information from records and the owner

 • Animal data

 • Previous illness

 • Present disease

 • Proforma for animal examination report

 • Observation of team

• Logical clinical examination of animals

 • Disease investigation kit

Key Points

• The most frequent physical damage in animals is an aural hematoma;

• Otitis externa is known to result in Zepp's operation, or drainboard from the lateral ear wall.

Introduction

An alternative name for the ear is the sensory organ of hearing. It could display both functional issues and structural abnormalities.

Anatomical abnormalities

Diseases of Pinna

The pinna is affected by several dermatological disorders. In rare cases, a disease only first affects the pinna or the pinna alone. A diagnosis is best determined based on the findings of a comprehensive history, a full physical and dermatologic examination, and the thoughtful selection and assessment of certain diagnostic tests, as with any dermatologic disorder.

Key Points

• Dystocia, uterine prolapse, obstetrics, and torsion of the uterus are among the common obstetrical issues in dairy animals.

• These reproductive abnormalities cause dairy farmers to suffer significant f inancial losses.

Introduction

Every instance of obstetrical complications needs to be handled right away. Along with taking the case history, a general clinical assessment and examination should be performed. Dystocia is one of the various obstetrical problems that is more common in cattle.

The X-ray film is the major element that record the image of part exposed with X-rays. Although the situation is changing with the introduction of new technologies in recent years. The film can be exposed by the direct action of X-rays, but more commonly the X-ray energy is converted into light by intensifying screens and this light is used to expose the film. The X-ray film is somewhat similar to photographic film in its basic composition. However unlike photographic film, the light (or radiation) sensitive emulsion is usually coated on both sides of the base of X- ray film so that it can be used with intensifying screens. Because of its importance to medicine, X-ray film is manufactured with consistent uniformity and quality, which facilitates standardization of exposure and processing.

Key Points

• Electrolyte Imbalance: Regularly monitor and rectify imbalances in potassium, sodium, and other electrolytes dependent on the individual situation. Prompt management requires early detection of metabolic emergencies.

• Fluid Management: To restore intravascular volume and prevent dehydration in many metabolic emergencies, adequate fluid replacement is essential.

• Continuous monitoring of vital signs, laboratory values, and clinical status is essential for evaluating the efficacy of interventions and making necessary modifications.

Introduction

A class of disorders known as "metabolic emergencies" affect metabolism and physiology abnormally in both congenital and acquired forms. Among these ailments are endocrine disorders, thyrotoxicosis, inborn metabolic inefficiencies, and illnesses linked to electrolyte imbalances. Hypercalcemia, hyponatremia, hypoglycemia, hyperglycemia, and diabetic ketoacidosis, as well as hyperuricemia, hyperuremia, and hypercreatininemia due to renal failure, lactic acidosis, hyperammoniemia, and adrenal failure, are metabolic emergencies that pose a life-threatening risk.

Key Points

• Drug poisonings can be acute or chronic and result in the development of clinical signs and symptoms that may lead to animal disability or death, as well as extreme physiological and/or psychological changes.

• Drugs are substances that are used to prevent, treat, diagnose, and relive disease conditions by changing the physiology and/or psychology of the individual.

• Certain veterinary drugs have a specific antidote to counteract poisoning cases, while other veterinary drugs do not, and supportive therapy is required to counter these poisonings.

• Over-the-counter (OTC) medications, which are defined as human drugs or nutritional supplements that are available without a prescription, have potential risks for use in animals due to their increased toxicity.

Introduction

Many veterinary medications, which are used to treat both animals and birds, have the potential to poison the species to whom they are provided. These medications' toxic effects are mostly caused by giving them to the wrong species, at the wrong doses, or in the wrong combinations of medications. Certain medication poisonings can be identified due to patient individuality and eccentricities. As a result, there are many cases of these poisonings. This chapter discusses the poisoning caused by frequently and carelessly used veterinary medications, such as the toxicity of antibiotics and antibacterials, the toxicity of antiparasitic drugs, the toxicology of analgesics, the toxicity of cough treatments, the toxicity of the digestive system, the toxicity of vitamins, and the toxicity of topical preparations.

Key Points

• It might be necessary to administer oxygen or perform artificial respiration. Giving tranquilizers is not a good idea.

• Precaution: It's crucial to always follow the label's instructions on how to use pesticides since they provide information on how to do so. Warnings against using on unapproved species or in testing conditions must also be included on labels. A maximum of care should be made to prevent drift or drainage to neighboring fields, pastures, ponds, streams, or other properties outside the treatment area. In no case should amounts larger than those specifically recommended be utilized.

Introduction

It has been determined that a number of plant species are poisonous to animals. These plants not only posed a health risk to humans and animals, but they also significantly reduced cattle productivity. Many plants contain chemicals that can be dangerous or even lethal to animals. The degree of toxicity varies based on the animal species, the quantity of plant material ingested, and the particular poisonous compounds in question. In general, there are two categories of dangerous plants: those that are known to be toxic and contain toxic compounds, and those that are normally non-toxic but can turn hazardous in certain circumstances. Here are some typical plant toxicities, along with information on managing toxicity and clinical signs.

The goats play a vital role in the economy of the poor and marginal farmers of rural India. Notwithstanding the fact that the goat population has shown a steady growth over the year’s very little effort has been taken for genetic improvement at farm level. As per 20th Livestock Census, 27.74% of the livestock population is Goats. Out of 148.88 million Indigenous Goats (Including Non-descript), 27.4% are pure breed, 9.1% are graded breeds and the remaining 63.5% are non-descript breeds. So, to increase the productivity per goat, we need to improve the breed quality scientifically. Artificial insemination (AI) using frozen semen is practiced to produce superior progeny and to accelerate the up gradation of stock. The conception rate with AI is lower but it has great potential to multiply superior quality of goat with faster rate. This technique also spread elite genetic material throughout a population with increased rate of genetic improvement. This technique is also important for the breed conservation process and has paved the way for other reproductive biotechnologies. The sufficient elite germplasm of male buck is not available throughout the country to cover breeding programmed by natural mating. AI is the best solution to improve the quality and productivity per goat.

The male genital system consists of:

1. The pair gonads, the testes
2. Epididymis
3. Vas deference or ductus deference
4. Accessory glands (Seminal vesicles, prostate glands, & bulbo-urethral glands)

Ian Donald in the year 1956 used the one-dimensional A-mode (amplitude mode) to measure the parietal diameter of the fetal head and thus introduced the ultrasound in diagnostic and medicine. Ultrasonography does not use radiation or powerful magnetic field as source of energy and the equipment cost is usually affordable. This modality involves the use of sound waves in viewing the longitudinal, sagittal and transverse planes for both testes . Sound is measured in cycles per second or hertz (Hz); the audible range of sound is from 20-20,000 Hz. Diagnostic ultrasound is usually in the range of 1–20 megahertz (MHz).

The speed of sound depends on the tissues through which it propagates because density and compressibility change the speed, the sound wave travels. On an average the assumed speed of sound in soft tissue is 1540 m/s.

1. Introduction
Animal experimentation remains a cornerstone of scientific research in many fields, from medical advances to pharmaceutical testing. However, the ethical treatment of laboratory animals has become a point of significant concern worldwide. India, through the Committee for the Control and Supervision of Experiments on Animals (CCSEA), ensures that ethical standards are maintained in research institutions. Established under the Ministry of Environment, Forests, and Climate Change (MoEF&CC), CCSEA is tasked with overseeing the use of animals in experiments, ensuring that procedures adhere to ethical guidelines and international norms. CCSEA’s guidelines are in line with international standards set forth by organizations such as the International Council for Laboratory Animal Science (ICLAS) and the European Union (EU), but they are tailored to address local needs and conditions. The guidelines, which focus on the welfare of laboratory animals, emphasize the ethical review process, animal care, and the importance of minimizing animal suffering. They also stress the need for researchers to implement the 3Rs—Replacement, Reduction, and Refinement—to minimize the use of animals and ensure humane practices in research. This chapter explores the CCSEA guidelines in detail and compares them with animal welfare regulations from around the world, including the United States, European Union, Japan, and Australia. By understanding the similarities and differences between these regulations, researchers and policymakers can ensure the ethical treatment of laboratory animals on a global scale.
2. Objectives of CCSEA Guidelines
The main objective of the CCSEA guidelines is to ensure that laboratory animals are treated ethically and humanely while also supporting the validity and scientific rigor of research. The guidelines encourage researchers to prioritize animal welfare while minimizing unnecessary suffering. Specifically, CCSEA focuses on:
1. Ethical Treatment of Animals: Ensuring that animals are housed in suitable conditions, given adequate veterinary care, and provided with a comfortable environment to reduce stress.
2. Justification of Animal Use: Ensuring that animals are used only when necessary, and that their use is scientifically justified.
3. Pain and Stress Minimization: Ensuring that experimental procedures cause the least pain, distress and suffering possible.

Biological and chemical reactions in living cells are dramatically reduced at low temperature, a phenomenon that can lead to the possible long-term preservation of cells and tissues. However, freezing is fatal to most living organisms, since both intra and extracellular ice crystals are formed and results in changes to the chemical setting of cells that lead to cellular mechanical constraints and injury. The major hurdle for cells to overcome at low temperatures is the water-to-ice phase transition. Cell injury at fast cooling rates is attributed to intracellular ice formation, whereas slow cooling causes osmotic changes due to the effects of exposure to highly concentrated intra and extracellular solutions or to mechanical interactions between cells and the extracellular ice. Cryopreservation is a process that maintains biological samples in a state of suspended animation at cryogenic temperature for any considerable period and is used to preserve the fine structure of cells (Jang et al., 2017).

Introduction
The use of animals in scientific research has been a cornerstone of medical advancements for decades. However, this practice has also been the subject of intense ethical debate. This lecture explores the necessity of animal experimentation, the ethical considerations involved, and the regulatory frameworks in place to ensure the humane treatment of laboratory animals.
The Need for Laboratory Animals
Animal experimentation has played a crucial role in numerous medical breakthroughs. The importance of laboratory animals in research cannot be overemphasized. Among the various purposes for which humans use animals, experimentation involves relatively few animals and serves a noble purpose in advancing scientific knowledge and human health.
Laboratory animals are invaluable in the drug development process for several reasons:
• Similarity to human organ systems, metabolism, and enzyme functions.
• Suitability as alternatives to human subjects.
• Small size and ability to be reared in controlled environments.
• High reproductive rates.
• Potential for genetic purity, leading to reproducible and reliable results.
The Importance of Animal Welfare
While the benefits of animal experimentation are clear, it’s equally important to consider the ethical implications of using animals for research. The concept of animal welfare is embedded in the Indian Constitution, which states that it is the duty of every citizen “to protect and improve the natural environment including forests, rivers, lakes and wildlife, and to have right compassion for the living creatures” (Article 51 A (g)). This ethical consideration for animals has been emphasized by philosophers, spiritual leaders, and scientists throughout history:

The skin is the largest organ of the body that plays an important role in defending the body against minor physical injuries, providing some defense against microbial invasion, maintenance of homeostasis, water conservation, temperature conservation, supporting hair growth and heat loss. Changes in the secretion of sebaceous glands lead to compromised defence. Abnormalities of the skin may arise from specific skin disease or by the poor general health status. Therefore, a detailed clinical examination of the animal as a whole and of its skin in particular, is an essential part of the process of diagnosis. The skin has three main layers starting from outside as the epidermis, the dermis and the subcutis. The epidermis consists largely of epithelial cells and pigment. The dermis is a connective tissue layer containing blood vessels, nerves, hair follicles, sebaceous and sweat glands. The inner most subcutis contains fibrous and fatty tissues that provides insulation and support. In healthy animals, the skin has considerable elasticity. It reduces in dehydration and inflammation / injury to skin. General clinical examination should be carried out first as a routine followed by special examination

Large Animals The collection and evaluation of cerebrospinal fluid (CSF) in farm animals with signs of diseases of nervous system provides very valuable diagnostic and prognostic information. Routinely, CSF is evaluated for total protein level, erythrocyte and leukocyte counts, and a differential cell count. Additional tests are available for specific neurologic conditions. CSF is primarily produced by the choroid plexuses in the lateral, third, and fourth ventricles through plasma ultra filtration and active transport across the blood-brain barrier. Smaller amounts of CSF are generated by the ependymal lining, pia arachnoid, meningeal blood vessels, and spinal cord’s central canal. The turnover rate is about 1% per minute, meaning systemic electrolyte or acid-base changes take several minutes to affect CSF