A patient presents with watery diarrhea, abdominal cramps, and nausea after consuming contaminated water from a stream during a camping trip. Laboratory tests reveal oocysts in the stool sample. Which of the following parasites is most likely responsible for this infection?

Correct Answer: C

Rationale: The patient is likely infected with Cryptosporidium parvum based on the symptoms of watery diarrhea, abdominal cramps, and nausea after consuming contaminated water. Cryptosporidium is a protozoan parasite that can be transmitted through contaminated water sources, such as streams. Laboratory tests revealing oocysts in the stool sample further support the diagnosis of Cryptosporidium infection, as these oocysts are characteristic of this parasite. Giardia lamblia is another common protozoan parasite that can cause similar symptoms but is usually associated with more foul-smelling, greasy diarrhea. Entamoeba histolytica causes amoebic dysentery, which presents with bloody diarrhea and abdominal pain. Cyclospora cayetanensis also causes watery diarrhea, but it is usually associated with foodborne outbreaks rather than waterborne transmission.

Correct Answer: B

Rationale: The nurse's priority action after noticing a sudden drop in blood pressure after administering anesthesia is to assess the patient's airway, breathing, and circulation (ABCs). This is crucial to determine the immediate cause of the sudden drop in blood pressure and to ensure the patient's safety and stability. Assessment of the ABCs will help identify any potential airway obstruction, respiratory distress, or circulatory issues that may be contributing to the drop in blood pressure. Once the assessment is done, appropriate interventions can be initiated to stabilize the patient's condition. Administering vasopressors, documenting the blood pressure readings, and notifying the anesthesiologist are important actions but assessing the ABCs takes precedence in this situation to ensure the patient's immediate needs are addressed.

Correct Answer: B

Rationale: When the supervisor allocates nurses to the priority wards in response to the situation of several nurses not reporting due to the Jeepney strike, she is practicing the ethical principle of justice. Justice in healthcare pertains to the fair distribution of resources and the equitable treatment of individuals. By ensuring that nurses are allocated fairly and appropriately to address the urgent needs of the hospital and its patients, the supervisor is upholding the principle of justice. This decision aims to ensure that all patients receive the care they need despite the unexpected staffing shortage.

Correct Answer: D

Rationale: In research involving adults who are capable of providing informed consent, such as a 21-year-old subject, the absolute way to ensure autonomy and respect for the individual's rights is to obtain informed and written consent directly from the subject herself. The subject's autonomy and right to self-determination should be respected, and obtaining consent directly from the subject ensures that they are fully informed about the research, its risks, benefits, and their rights regarding anonymity and confidentiality. In this case, Nurse Carmi must explain the research process clearly to the 21-year-old subject, obtain her informed consent in writing, and ensure that her anonymity, confidentiality, and human rights are protected throughout the study.

Correct Answer: B

Rationale: Urinary incontinence is a common complication associated with prostatectomy for the treatment of benign prostatic hyperplasia (BPH). Prostate surgery, such as a prostatectomy, can disrupt the sphincter muscle that controls the flow of urine from the bladder, leading to temporary or even long-term urinary incontinence in some patients. This usually improves over time with pelvic floor exercises and other treatment options, but it is an important consideration when discussing the potential risks and benefits of prostate surgery with patients. While erectile dysfunction and retrograde ejaculation can also be potential side effects of prostate surgery, urinary incontinence is specifically associated with issues related to bladder control following the procedure. Urethral stricture, although it can occur post prostate surgery, is less common compared to urinary incontinence.

Correct Answer: A

Rationale: The patient's lack of sensation in her right leg, allowing her cat to scratch her without her noticing, is indicative of neuropathy. Neuropathy is a common diabetic complication characterized by nerve damage that can result in loss of sensation or altered sensation in different parts of the body, including the extremities. In this case, neuropathy has likely affected the patient's right lower extremity, leading to her inability to feel the cat scratching her leg and resulting in the unnoticed scratches, infection, and subsequent cellulitis.

Correct Answer: B

Rationale: Unstable angina is characterized by chest pain at rest, which is not relieved by nitroglycerin. The ECG findings in unstable angina typically show ST-segment depression or T-wave inversion. It is considered a medical emergency as it can progress to a myocardial infarction. Stable angina, on the other hand, is chest pain or discomfort that occurs with exertion and is relieved by rest or medications like nitroglycerin. Acute myocardial infarction would typically present with ST-segment elevation on ECG, while Prinzmetal's angina is characterized by transient ST-segment elevation due to coronary artery vasospasm.

Correct Answer: C

Rationale: Periodontitis is the dental condition characterized by inflammation and destruction of the supporting structures of the teeth, including the gingiva (gums), periodontal ligament, and alveolar bone. It is usually caused by untreated gingivitis, where plaque buildup along the gumline leads to bacterial infection and inflammation, resulting in destruction of the tissues that support the teeth. If left untreated, periodontitis can lead to tooth loss and other complications. Gingivitis, on the other hand, is inflammation of the gums without involvement of the supporting structures, while dental caries refer to tooth decay or cavities in the enamel. Dental abscess is a localized collection of pus caused by a bacterial infection.

Correct Answer: A

Rationale: At the concrete operational stage according to Piaget's theory, children typically demonstrate logical thinking abilities and are able to understand and work with concrete objects and events. They can also grasp concepts such as conservation and classification. These children are able to think logically about concrete events but may still struggle with abstract and hypothetical situations. Therefore, Belle, functioning at the concrete operational stage, would exhibit behaviors such as thinking logically and being able to see possibilities, as described in option A.