1 Fisiopatogenia

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The speaker introduces the development of audiovisual materials to aid children in distance learning and presents a video demonstrating the construction of a water pyramid.

Introduction to Audiovisual Materials

• The speaker is developing audiovisual materials to assist children in distance learning.

• A video showcasing the construction of a water pyramid is presented as an example.

Detailed Examination Process

The detailed examination process for a feline patient with diarrhea is outlined, starting from history taking to clinical examination.

History Taking and Initial Findings

• Patient details: female mixed-breed feline, aged between two and three months, presenting with diarrhea for three days.

• Anamnesis reveals recent vaccination, parasite treatment, and living with a three-month-old dog.

Clinical Examination and Differential Diagnoses

• Clinical examination findings include abdominal palpation showing thickened intestines with liquid content and pain on palpation.

• Importance of age in determining potential diseases affecting young animals during history taking.

Vaccination Impact and Differential Diagnoses

Discussion on vaccination effects, differential diagnoses based on history, and implications for disease prevention.

Vaccination Considerations

• Significance of recent vaccination in understanding immunity development against diseases.

• Uncertainty due to unknown parasite treatment's spectrum of action impacting diagnosis accuracy.

Differential Diagnosis Insights

• Living with a young dog raises questions about cross-species infection possibilities.

Histological Analysis of Intestinal Issues

Explanation of histological aspects related to intestinal issues causing diarrhea in the feline patient.

Histological Examination Details

• Observations include intestinal dehydration levels, inflamed intestines with liquid content indicating digestive tract involvement.

Functional Aspects of Intestinal Villi

Elaboration on the functions and replenishment process of intestinal villi cells affecting digestion and absorption processes.

Intestinal Villi Functions

• Description of cell turnover within villi impacting functionality based on maturity levels.

Types of Diarrhea & Causes

Differentiation between osmotic diarrhea types caused by solutes like salts or enzyme deficiencies such as lactase leading to sugar malabsorption.

Diarrhea Classification

Intestinal Disorders and Pathogens

The discussion delves into various intestinal disorders caused by pathogens, highlighting mechanisms of action and resulting symptoms.

Mechanisms of Diarrhea

• Intestinal contents unable to be absorbed lead to solute formation, drawing water into the intestinal lumen, resulting in watery feces in secretory diarrhea.

• Bacteria altering metabolism can increase secretion by enterocytes, leading to more liquid being eliminated into the intestinal lumen.

• Diseases like parvovirus can disrupt crypt cells, reducing nutrient absorption and causing exudative diarrhea.

Causes of Altered Motility

• Medications like sympathetic mimetics can stimulate motility, increasing bowel movement frequency.

• Diarrhea types include acute and chronic; acute diarrhea may present with or without blood, with melena indicating digested blood presence.

Severe Intestinal Conditions

• Disentery is characterized by bloody feces due to intestinal damage preventing digestion of hemoglobin.

• Canine parvovirus damages intestinal crypt cells, leading to extensive bleeding and necrotic tissue presence in the small intestine.

Pathogenic Mechanisms

Exploring pathogenic mechanisms of bacteria, viruses, and parasites that cause gastrointestinal diseases.

Bacterial Pathogenesis

• Bacterial invasion progresses through colonization, penetration, and multiplication stages; toxins play a crucial role in pathogenesis.

Viral Pathogenesis

• Viruses primarily induce cell lysis as a pathogenic mechanism; histological images reveal viral impact on enterocytes leading to necrosis.

• Additional viral pathogenic mechanisms include syncytia formation and inclusion body development within host cells.

Parasitic Pathogenesis

Understanding Diarrhea in Veterinary Medicine

In this section, the speaker discusses the pathophysiology of diarrhea in veterinary medicine, focusing on various causes and diagnostic approaches.

Causes of Diarrhea

• Parasitic infections can lead to tissue compression and toxic actions due to secretions altering cellular metabolism.

• Parasites may carry other organisms like bacteria or viruses, triggering hypersensitivity reactions.

• Diarrhea is a result of altered intestinal physiological functions, leading to symptoms like yellowish mucous feces.

Diagnostic Insights

• Necropsy images reveal intestines with abnormal size, color, thickened walls, increased inflammatory cells in the mucosa, and shortened villi.

• Enteritis catarrhal is identified as the cause of diarrhea in this case study.

Etiologies of Diarrhea

• Acute diarrhea can stem from dietary factors (intolerance or allergy), toxins (plants, chemicals), infections (viral - e.g., canine distemper; bacterial - e.g., salmonella), and parasitic origins (e.g., ascarids).

• Various viral infections like feline coronavirus and feline leukemia virus can also cause diarrhea. Bacterial causes include Campylobacter jejuni and Salmonella spp.

Diagnosis and Treatment Strategies for Feline Diarrhea

This segment delves into diagnosing feline diarrhea through differential diagnosis based on clinical history and laboratory tests.

Clinical Diagnosis Process

• A cat presenting with catarrhal-type diarrhea for three days prompts differential diagnosis ruling out bacterial or toxic origins based on history.

• Presumptive diagnoses such as feline coronavirus infection or ascarid infestation are considered due to similar clinical presentations.

Laboratory Testing Importance

• Laboratory tests are crucial for confirming diagnoses by differentiating between potential causes like viral infections or parasitic infestations.

Treatment Approach