eChapters

There are some methods to control male reproductive behaviour for better breeding and managemental practices i.e. Vasectomy and Caudal epididymectomy, Penile surgeries, and castration etc. • Surgical and non surgical interventions in the male reproductive system are carried out for: • To make teaser bull • To make bull sterile • To prevent the transmission of venereal diseases • Population control or Breeding management • To rectify any ailment or deformity Teaser Bull • A male animal whose capability of spermatogenesis as well as libido is maintained but it is not able to impregnate a female. • For the preparation of teaser bull or Gomer bull, Male animal should be selected well before the start of breeding season. Bull should be young vigorous and fertile. It should be of moderate adult size with mild temperament. Heavy and large sized bull is tough to handle, needs more time for surgery, has chances of more hemorrhage, and may have more post surgical complications.

Sutures or surgical threads : means a material used to hold the edges of tissue in close approximation. 

Objectives
    1.    To facilitate healing. 
    2.    Haemostatic.
    3.    To retain drainage tube and implants. 
    4.    To reduce the size of natural opening.

Aim

To depict the detail method of tendon suturing of transected gastrocnemious tendon for union.

Procedure

After cleaning, debriding and flushing the transected site thoroughly local antiseptic and antibiotic is applied.

1. To expose the tendon ends clear visual as well as proper exposer the site was enlarged by two vertical incision placed at dorsal and ventral part of the transected site.(Fig.1).
2. The three different tendons and their locations is identified. The both end of tendon of a particular group are brought close together and joins end to end and retained with strong polyester suture putting to interrupted knots at 90 degree to each other.(Fig. 2).
3. Their peritendon cover are pulled over the suturing site from their either ends and are also retained in position with additional interrupted suture running at 90 degree to each other.(Flg. 3). In this way 4 interrupted suture are required for approaching one tendon.
4. In this way all the 3 tendons are joined with their respective other ends with suture. Total no of 12 interrupted suture are required for joining all the 3 structure of the gastrocnemious tendon. At the end the suture tendons are strengthened by placing to interrupted stainless steel suture. (Fig. 4).

Finally a flushing catheter was placed at higher level and the suture site is covered with a thick dry antiseptic absorbent cotton padding.

This is a benign/malignant tumor originating from the apocrine and eccrine sweat glands in dogs. It is usually recorded in the head and neck region but it may occur on any site.

Cytology reveals clusters of moderate to severe exfoliated neoplastic cells which contain round nuclei slightly eccentric in position in the light pale granular cytoplasm. In carcinomas, clusters of basophilic epithelial cells had large nuclei and prominent nucleoli. It may also contain one or two large secretory droplets.

Indication: Irreparable damage of the meta tarsal joint.

M.mMedial malleolus

M.I., Lateral malleolus

T, Tibia

T. t., Tibial tarsal bone

T.f., Fibulartarsal bone

T.c. + 4, Fused central and fourth tarsal bones.

T.1, First tarsal bone

T.2+3, Fused second and third tarsal bones

Mt.2,Small, or second metatarsal bone

Mt.3+4, Large metatarsal or fused third or fourth metatarsal bon

Definition

Fracture of Upper 3rd of tibio-fibula Presence as a difficult Problem for the Surgeon to immobilise it Perfectly. As the fracture site generally moves within the imobiliser. Its healing becomes difficult. The aimof immobilisation technique of upper 3rd tibio-fibula fracture is to fix the upper 3rd of tibio-fibula with the anterior half of ring of thomas splint with bandages. This is an important step for achieving no movement of fracture fragment during healing.

Indication

Correction of upper 3rd fracture of tibio-fibula (Fig.1) by thomas splint application.

Laparoscopy is an operative procedure designed for the visual inspection of peritoneal cavity and biopsy of organs. Laparoscopy is a valuable diagnostic and therapeutic tool in clinical medicine. In the field of cholecystectomy, appendicectomy, vagotomy, hernia repair and adhesion release laparoscopy surgery offers significant advantages over open surgery in humans. For gynecological problems like ovarian cyst or in the case of oophorectomies and hysterectomies, laparoscopic surgery (‘scarless surgery’) is now considered a better alternative in addition to laparoscopic sterilization. Only in the last 15 years laparoscopy is widely used in different animal species for research and clinical diagnostic and therapeutic purposes. The first canine laparoscopy procedures were performed in the early 1900’s (Kelling, 1902). Anderson (1937) used dogs to perfect his skills prior to human clinical trials. The first clinical application of laparoscopy in dog’s involved ovarian function studies in the early 1960’s and Lettow reported the first laparoscopic liver biopsy procedure in a dog in 1972.

Introduction
Temperature regulation is a critical physiological process that allows animals and birds to maintain homeostasis in varying environmental conditions. Thermoregulation involves a complex interplay of behavioral, physiological, and biochemical mechanisms that ensure the body temperature of these animals remains within a narrow, optimal range. This process is vital for maintaining metabolic functions, health, and productivity, particularly in agricultural settings where animals are often exposed to temperature extremes.In farm animals such as cattle, sheep, and pigs, thermoregulation is primarily managed through a combination of heat production, heat dissipation, and behavioral adaptations. Endothermic animals generate heat internally through metabolic processes, particularly in the muscles and liver. This heat is distributed throughout the body via the circulatory system. When ambient temperatures rise, farm animals activate various cooling mechanisms to prevent hyperthermia. These mechanisms include increased respiratory rates (panting), sweating (in species like cattle and horses), and vasodilation, where blood vessels near the skin surface expand to dissipate heat. Conversely, in cold environments, animals reduce heat loss by vasoconstriction, piloerection (raising of hair or fur), and seeking shelter or huddling together. Behavioral adaptations, such as seeking shade or water, also play a crucial role in temperature regulation.In poultry, thermoregulation is equally important but is managed differently due to their unique physiology. Birds lack sweat glands and have a higher metabolic rate compared to mammals, which means they rely more heavily on respiratory evaporative cooling and behavioral adaptations. Poultry regulate their body temperature by panting, which increases evaporative heat loss from the respiratory tract. Additionally, birds adjust their posture, such as spreading their wings or ruffling feathers, to enhance heat dissipation. During cold stress, poultry increase their metabolic rate, fluff their feathers to trap air for insulation, and reduce blood flow to peripheral areas to conserve heat. The thermal comfort zone, or thermoneutral zone, is narrower in poultry compared to larger mammals, making them more susceptible to temperature extremes.The ability of farm animals and poultry to regulate their body temperature is influenced by several factors, including age, breed, body condition, and acclimatization to the environment. Younger animals and certain breeds are more vulnerable to temperature stress due to their less developed thermoregulatory mechanisms or specific genetic traits. For instance, breeds with higher muscle mass or thicker coats may be more prone to heat stress, while those with lower body fat reserves may struggle in cold conditions. Acclimatization, or the gradual adaptation to a new thermal environment, plays a key role in enhancing the thermoregulatory capacity of these animals.

Introduction
Teratology is the branch of veterinary embryology that studies congenital malformations, often referred to as birth defects, which arise during embryonic or fetal development. Understanding teratology is crucial for veterinarians and researchers because these defects can lead to substantial animal morbidity, mortality, and economic losses in the agricultural and livestock industries. In addition, teratological research can offer insights into human congenital disorders, given the similarities between mammalian developmental processes.
Definition and Scope of Teratology
The term “teratology” derives from the Greek word teras, meaning “monster” or “marvel,” reflecting the historical observation of grossly abnormal fetuses or neonates. Teratology focuses on the etiology (causes), pathogenesis (development), and morphological consequences of developmental disorders. These abnormalities can manifest as structural, functional, or biochemical anomalies, and they can affect a wide range of systems, including the cardiovascular, skeletal, nervous, and reproductive systems. In veterinary medicine, the study of teratogens—agents that cause developmental malformations—is critical. Teratogens include drugs, environmental chemicals, infections, radiation, and nutritional deficiencies, among others. These agents can disrupt normal embryonic or fetal development, leading to a variety of abnormalities.
Causes of Teratogenesis
Teratogenic agents can be broadly classified into several categories:
1. Genetic Factors
Genetic mutations, chromosomal abnormalities, and hereditary disorders can predispose animals to developmental defects. Genetic teratogenesis can occur due to spontaneous mutations in the DNA sequence or inheritance of defective genes from one or both parents. Chromosomal anomalies, such as duplications, deletions, or translocations of

Introduction

Test of pollen viability (extent of pollen viability) is important in pollination experiments to ensure fertility/seed setting. It is also important in monitoring state of pollens during storage in ecological/ taxonomic studies as well as during research on pollen biochemistry, genetics, stigma interactions, and incompatibility studies. Pollen viability refers to the ability of pollen to accomplish post-pollination events to achieve fertilization. Pollen viability test has gained importance particularly in plant breeding and hybrid seed production experiments/ practices. In this chapter, you will be acquainted with the basics of pollen viability test. However, for more professional knowledge on the topic readers are suggested to refer specialized books.

Pollen Viability Test

It is important to know the extent of viability of pollens used in pollination experiment, in finding fertility of a plant of interest, to monitor state of pollen on storage, in ecological/taxonomic studies, as well as in research on biochemistry, genetics, stigma interaction, incompatibility assay, etc. of pollen. Several pollen viability tests have been developed time-to-time. It is recommended to initially use different tests for a given pollen type to find out the most appropriate method that provides reliable result on pollen viability. It is important to note that every procedure requires standardization of protocol according to the sample used. Following different tests are used for assessing pollen viability.

1. In-vitro Pollen Germination Test

It is a simple, speedy, and quantitative test for assessing pollen viability. In this method, a collection/sample of pollen is germinated in vitro and observed under microscope. The percentage of germinating pollens (producing pollen tube) after appropriate treatment and a given period of time is determined. The percentage provides an index of viability of the pollen sample.

Introduction

Seed is a living entity (mature ovule) consisting of a tiny plant in embryonic stage along with the stored food protected by an outer layer known as seed coat. Seed is an important biological input in agriculture, which is economically important for successful crop husbandry. Cotyledons serve as the source of nutrients (proteins, carbohydrates, and oils) that not only nurture the plant at the early developmental (seedling) stages of plant but also the vegetarian (heterotroph) organisms. Being one of the important inputs in agriculture, viability of seed needs to be assessed to know the germination percentage of seeds used to raise a crop. Since viability of seeds may deteriorate on storage depending on the storage conditions. Therefore, often it becomes important to test viability/germinability and vigour of seeds before being used for raising a crop or conducting an experiment. In this chapter, we briefly discuss about the different methods which can be used for testing the viability of seeds.

Seed Viability

Seed viability can be defined as the capability of the seed to germinate and produce a normal seedling within a specified period. In other words, seed viability indicates how many seeds in a lot are alive and could develop into plants under appropriate field conditions. It is very important that most of the stored seeds are capable of germinating when sown in a field. They must possess higher viability at the beginning of storage and maintain it over the storage. A seed with high initial viability survives longer in storage; however, the viability deteriorates slowly at first and then rapidly as the storage prolongs. It is important to know the duration of storage after which a considerable decline in viability occurs under given storage conditions so that to take necessary action to revive the seeds. Excessive deterioration in vianility of seeds may lead to loss of the seed/material/ germplasm.

The process of converting the frozen semen to liquid state while retaining maximum semen quality is called thawing. The process of thawing is as important as freezing as there is equal probability of loss of semen quality in freezing and thawing. Therefore, great care should be taken while thawing to insure that it is done with minimum loss of sperm quality. There are two methods of thawing:

1.    Rapid thawing

2.    Slow thawing

The effectiveness of each method of thawing depends upon the extender composition and freezing procedure. With any thawing procedure, the recommendations of the semen supplier should be followed. The thumb rule is that rapid freezing rates require rapid thawing.

The cervical vertebrae are 7 in number.

The first and second cervical vertebrae are highly modified in conformity with the special function of support and movements of the head.

The third, fourth and fifth have the following characters:

The body is long. Ventral surface present a median ventral spine.

The dorsal surface has a flat central area which is narrow in the middle of the vertebrae, and wide at either end. On either side of this area there is a groove which lodges the longitudinal spinal vein.

The anterior extremity or head has an oval articular surface which faces forward and downward; it is strongly convex and wider above than below.

The posterior extremity is larger and has a nearly circular cotyloid cavity.

The arch is large and strong. It is perforated on either side by foramen which communicates with the foramen transverse hum. The vertebral notches are large.

The articular process are large. Their articular surface are extensive, oval in outline, and slightly concave.

X-ray photons are produced as a result of electrons hitting metal while extremely rapidly moving at high speed. This is achieved through the application of an electric current to a cathode (negative electrode) via a high voltage power source (electricity) which enables electrons to be released from the cathode into the X-ray tube. These electrons, being negatively charged, are attracted to the anode (positive electrode or target). When the electrons strike the metallic target (anode) in the tube, X-rays and heat are produced. Basically the process of producing an X-ray involves a source that produces X-rays and radiating them through a body or object, where they are absorbed at different rates until they are detected by a sensitive film or cassette. It should be mentioned at this point that most of the energy of the electrons is not converted into X-rays but is dissipated as heat. In fact 99% of the energy dissipated in the target is lost as heat, and only 1% is converted to X-ray energy.

Ultrasonography has an importance place in human practice and veterinary f ield especially in canine practice. Since many years two dimensional ultrasound has been used for scanning purposes both in human and animal practice. But the scenario has changed in human practice with development of three dimensional technology and later four dimensional ultrasonography has developed which shows movements of the objects being scanned especially in the case of fetuses. Nowadays it has been common to use these advanced technology in the human practices. Yet these technologies are in the childhood stage in the veterinary field. High cost of 3D/4D ultrasound equipment, operational difficulties in non sedated animals & lack of specific knowledge about the operation of volume scanning hinder the use of this technology in the veterinary field. Better understanding of the different application of these technologies can be made to use in research areas for the better understanding of the abnormalities, post therapeutics as well in the diagnosis of the diseases

Principle of Three Dimensional and Four Dimensional Ultrasonography

Sound waves of frequency higher than human audible frequency usually ranges from 2-13 MHz are used in ultrasonography. Depending upon on depth of tissue from the scanning surfaces frequency is selected. Three dimensional ultrasonography gives three dimensional images of the volume being scanned .it works on the same principle of 2D ultrasonography but ultrasonographic beams are sent different angles to get three dimensional image of object being scanned. Volume information is obtained either directly using 2D array probe or by reconstructing three dimensional volume from a series of continuous or non- continuous 2D images by using software (Fenster and Downey, 2000). An advancement of 3D technology is 4D ultrasound. Four dimensional ultrasound adds the fourth dimension as time and gives a dynamic real-time 3Dultrasonography of the concerned organ with a continuous volume image acquisitioned rendering process. (Khurana and Dahiya, 2004).

• General considerations

 • Cyanide poisoning

 • Nitrate poisoning

 • Nitrite poisoning

 • Oxalate poisoning

 • Strychnine poisoning

 • Arsenic poisoning

 • Lead poisoning

 • Thalium poisoning

 • Ergot poisoning

 • Carbon monoxide poisoning

 • Phenothiazine poisoning

 • Pesticide poisoning

Introduction 
Good Laboratory Practices (GLP) serve as the foundation of any efficient and high-functioning laboratory, ensuring data reliability, patient safety and adherence to regulatory standards. In an environment where accuracy, consistency and data integrity are critical, comprehensive GLP training becomes the driving force behind operational excellence. A well-structured training program strengthens the capabilities of laboratory professionals, enabling them to navigate complex regulatory landscapes while upholding the highest standards of quality and safety. In today’s rapidly evolving scientific and industrial sectors, maintaining stringent laboratory standards is imperative rather than optional. GLP provides a structured approach that ensures every test, analysis and experimental procedure is carried out with precision, ethical rigor and strict adherence to safety measures. However, beyond simply following GLP principles, continuous assessment of laboratory personnel’s competency is essential to sustaining long-term proficiency and compliance. Competency assessment in GLP plays a crucial role in verifying whether laboratory staff possess the requisite expertise to perform tests accurately and generate reliable, scientifically valid results. As a framework designed to uphold the credibility of non-clinical laboratory studies, GLP is instrumental in reinforcing research integrity and ensuring compliance with regulatory authorities. Laboratories that rigorously follow GLP guidelines contribute to reproducible and verifiable scientific findings, which are vital for regulatory approvals and critical decision-making in pharmaceuticals, healthcare and research sectors. Competency assessments function as both a quality assurance mechanism and a professional development tool, guaranteeing that laboratory personnel not only comprehend standard protocols but can also execute them effectively in real-world scenarios. With the continuous evolution of laboratory sciences, training and assessment methodologies must also advance to meet new challenges. This chapter explores the transformation of GLP training and competency evaluation, emphasizing their significance, diverse methodologies and essential components. Additionally, it highlights best practices for implementation and introduces innovative strategies designed to complement established global standards, such as those outlined by the Clinical and Laboratory Standards Institute (CLSI) and the Indian Council of Medical Research (ICMR). By embracing these advancements, laboratories can not only achieve regulatory compliance but also cultivate a culture of excellence, ensuring that their workforce remains agile, skilled and prepared to meet the demands of modern scientific landscapes.